King, Julian A., Mortlock, Daniel J., Webb, John K., Murphy, Michael T.
Recent attempts to constrain cosmological variation in the fine structure constant, alpha, using quasar absorption lines have yielded two statistical samples which initially appear to be...
MASE: A New Data--Reduction Pipeline for the Magellan Echellette Spectrograph (2009)
Bochanski, John J., Hennawi, Joseph F., Simcoe, Robert A., Prochaska, J. Xavier, West, Andrew A., Burgasser, Adam J., ...
We introduce a data reduction package written in Interactive Data Language (IDL) for the Magellan Echellete Spectrograph (MAGE). MAGE is a medium-resolution (R ~4100), cross-dispersed, optical...
Revisiting the origin of the high metallicities of sub-damped Lyman-alpha systems (2009)
Dessauges-Zavadsky, Miroslava, Ellison, Sara L., Murphy, Michael T.
Sub-damped Lyman-alpha systems (sub-DLAs) have previously been found to exhibit a steeper metallicity evolution than the classical damped Lyman-alpha systems (DLAs), evolving to close to solar...
Ellison, Sara L., Murphy, Michael T., Dessauges-Zavadsky, Miroslava
Using a sample of 21 damped Lyman alpha systems (DLAs) and 35 sub-DLAs, we evaluate the D-index from high-resolution spectra of the Mg ii λ 2796 profile. This sample represents an increase in...
Dust depletion, chemical uniformity and environment of Ca II H&K quasar absorbers (2009)
Zych, Berkeley J., Murphy, Michael T., Hewett, Paul C., Prochaska, Jason X.
Ca ii λλ3934, 3969 absorbers, which are likely to be a subset of damped Lyman α systems (DLAs), are the most dusty quasar absorbers known with an order of magnitude more extinction in E(B - V)...
The outer halo globular clusters of M31 (2009)
Alves-Brito, Alan, Forbes, Duncan A., Mendel, Jon T., Hau, George K. T., Murphy, Michael T.
We present Keck/HIRES spectra of three globular clusters in the outer halo of M31, at projected distances beyond approximate to 80 kpc from M31. The measured recession velocities for all three...
Revisiting the origin of the high metallicities of sub-damped Lyman-alpha systems (2009)
Dessauges-Zavadsky, Miroslava, Ellison, Sara L., Murphy, Michael T.
Sub-damped Lyman-alpha systems (sub-DLAs) have previously been found to exhibit a steeper metallicity evolution than the classical damped Lyman-alpha systems (DLAs), evolving to close to solar...
Dust depletion, chemical uniformity and environment of Ca II H&K quasar absorbers (2009)
Zych, Berkeley J., Murphy, Michael T., Hewett, Paul C., Prochaska, Jason X.
Ca ii λλ3934, 3969 absorbers, which are likely to be a subset of damped Lyman α systems (DLAs), are the most dusty quasar absorbers known with an order of magnitude more extinction in E(B - V)...
Ellison, Sara L., Murphy, Michael T., Dessauges-Zavadsky, Miroslava
Using a sample of 21 damped Lyman alpha systems (DLAs) and 35 sub-DLAs, we evaluate the D-index from high-resolution spectra of the Mg ii λ 2796 profile. This sample represents an increase in...
The outer halo globular clusters of M31 (2009)
Alves-Brito, Alan, Forbes, Duncan A., Mendel, Jon T., Hau, George K. T., Murphy, Michael T.
We present Keck/HIRES spectra of three globular clusters in the outer halo of M31, at projected distances beyond approximate to 80 kpc from M31. The measured recession velocities for all three...
Revisiting the origin of the high metallicities of sub-damped Lyman-alpha systems (2009)
Dessauges-Zavadsky, Miroslava, Ellison, Sara L., Murphy, Michael T.
Sub-damped Lyman-alpha systems (sub-DLAs) have previously been found to exhibit a steeper metallicity evolution than the classical damped Lyman-alpha systems (DLAs), evolving to close to solar...
Deuterium abundance in the most metal-poor damped Lyman alpha system: converging on Ωb,0h^2 (2008)
Pettini, Max, Zych, Berkeley J., Murphy, Michael T., Lewis, Antony, Steidel, Charles C.
The most metal-poor damped Lyα system known to date, at zabs= 2.61843 in the spectrum of the QSO Q0913+072, with an oxygen abundance of only ∼1/250 of the solar value, shows six well-resolved DI...
Dust depletion, chemical uniformity and environment of CaII H&K quasar absorbers (2008)
Zych, Berkeley J., Murphy, Michael T., Hewett, Paul C., Prochaska, Jason X.
CaII 3934,3969 absorbers, which are likely to be a subset of damped Lyman alpha systems, are the most dusty quasar absorbers known, with an order of magnitude more extinction in E(B-V) than other...
Ellison, Sara L., Murphy, Michael T., Dessauges-Zavadsky, Miroslava
Using a sample of 21 damped Lyman alpha systems (DLAs) and 35 sub-DLAs, we evaluate the D-index = EW / Delta v x 1000 from high resolution spectra of the MgII lambda 2796 profile. This sample...
Laser frequency combs for astronomical observations (2008)
Steinmetz, Tilo, Wilken, Tobias, Araujo-Hauck, Constanza, Holzwarth, Ronald, Hänsch, Theodor W., Pasquini, Luca, ...
A direct measurement of the universe's expansion history could be made by observing in real time the evolution of the cosmological redshift of distant objects. However, this would require...
Stringent null constraint on cosmological evolution of the proton-to-electron mass ratio (2008)
King, Julian A., Webb, John K., Murphy, Michael T., Carswell, Robert F.
We present a strong constraint on variation of the proton-to-electron mass ratio, mu, over cosmological time scales using molecular hydrogen transitions in optical quasar spectra. Using high quality...
Murphy, Michael T., Flambaum, Victor V., Muller, Sebastien, Henkel, Christian
The Standard Model of particle physics assumes that the so-called fundamental constants are universal and unchanging. Absorption lines arising in molecular clouds along quasar sightlines offer a...
Pettini, Max, Zych, Berkeley J., Murphy, Michael T., Lewis, Antony, Steidel, Charles C.
The most metal-poor DLA known to date, at z = 2.61843 in the spectrum of the QSO Q0913+072, with an oxygen abundance only about 1/250 of the solar value, shows six well resolved D I Lyman series...
Halo gas cross sections and covering fractions of MgII absorption selected galaxies (2008)
Kacprzak, Glenn G., Churchill, Christopher W., Steidel, Charles C., Murphy, Michael T.
We examine halo gas cross sections and covering fractions, fc, of intermediate-redshift Mg II absorption selected galaxies. We computed statistical absorber halo radii, Rx, using current values of...
Diffuse interstellar bands in z < 0.6 Ca ii absorbers (2008)
Ellison, Sara L., York, Brian A., Murphy, Michael T., Zych, Berkeley J., Smith, Arfon M., Sarre, Peter J.
The diffuse interstellar bands (DIBs) probably arise from complex organic molecules whose strength in local galaxies correlates with neutral hydrogen column density, N(H i), and dust reddening, E(...
Revisiting VLT/UVES constraints on a varying fine-structure constant (2008)
Murphy, Michael T., Webb, Jonathan K., Flambaum, Victor V.
Abstract not available.
Diffuse interstellar bands in z < 0.6 Ca ii absorbers (2008)
Ellison, Sara L., York, Brian A., Murphy, Michael T., Zych, Berkeley J., Smith, Arfon M., Sarre, Peter J.
The diffuse interstellar bands (DIBs) probably arise from complex organic molecules whose strength in local galaxies correlates with neutral hydrogen column density, N(H i), and dust reddening, E(...
Revisiting VLT/UVES constraints on a varying fine-structure constant (2008)
Murphy, Michael T., Webb, Jonathan K., Flambaum, Victor V.
Abstract not available.
Murphy, Michael T., Flambaum, Victor V., Muller, Sébastien, Henkel, Christian
The Standard Model of particle physics assumes that the so-called fundamental constants are universal and unchanging. Absorption lines arising in molecular clouds along quasar sightlines offer a...
Cosmic dynamics in the era of Extremely Large Telescopes (2008)
Liske, Jochen, Grazian, Andrea, Vanzella, Eros, Dessauges, Miroslava, Viel, Matteo, Pasquini, Luca, ...
The redshifts of all cosmologically distant sources are expected to experience a small, systematic drift as a function of time due to the evolution of the Universe's expansion rate. A measurement of...
Cosmic dynamics in the era of Extremely Large Telescopes (2008)
Liske, Jochen, Grazian, Andrea, Vanzella, Eros, Dessauges, Miroslava, Viel, Matteo, Pasquini, Luca, ...
The redshifts of all cosmologically distant sources are expected to experience a small, systematic drift as a function of time due to the evolution of the Universe's expansion rate. A measurement of...
Laser frequency combs for astronomical observations (2008)
Steinmetz, Tilo, Wilken, Tobias, Araujo-Hauck, Constanza, Holzwarth, Ronald, Hänsch, Theodor W., Pasquini, Luca, ...
A direct measurement of the universe's expansion history could be made by observing in real time the evolution of the cosmological redshift of distant objects. However, this would require...
Laser frequency combs for astronomical observations (2008)
Steinmetz, Tilo, Wilken, Tobias, Araujo-Hauck, Constanza, Holzwarth, Ronald, Hänsch, Theodor W., Pasquini, Luca, ...
A direct measurement of the universe's expansion history could be made by observing in real time the evolution of the cosmological redshift of distant objects. However, this would require...
Diffuse interstellar bands in z < 0.6 Ca ii absorbers (2008)
Ellison, Sara L., York, Brian A., Murphy, Michael T., Zych, Berkeley J., Smith, Arfon M., Sarre, Peter J.
The diffuse interstellar bands (DIBs) probably arise from complex organic molecules whose strength in local galaxies correlates with neutral hydrogen column density, N(H i), and dust reddening, E(...
Revisiting VLT/UVES constraints on a varying fine-structure constant (2008)
Murphy, Michael T., Webb, Jonathan K., Flambaum, Victor V.
Abstract not available.
Cosmic dynamics in the era of Extremely Large Telescopes (2008)
Liske, Jochen, Grazian, Andrea, Vanzella, Eros, Dessauges, Miroslava, Viel, Matteo, Pasquini, Luca, ...
The redshifts of all cosmologically distant sources are expected to experience a small, systematic drift as a function of time due to the evolution of the Universe's expansion rate. A measurement of...
Murphy, Michael T., Flambaum, Victor V., Muller, Sébastien, Henkel, Christian
The Standard Model of particle physics assumes that the so-called fundamental constants are universal and unchanging. Absorption lines arising in molecular clouds along quasar sightlines offer a...
Diffuse interstellar bands in z < 0.6 Ca ii absorbers (2008)
Ellison, Sara L., York, Brian A., Murphy, Michael T., Zych, Berkeley J., Smith, Arfon M., Sarre, Peter J.
The diffuse interstellar bands (DIBs) probably arise from complex organic molecules whose strength in local galaxies correlates with neutral hydrogen column density, N(H i), and dust reddening, E(...
Revisiting VLT/UVES constraints on a varying fine-structure constant (2008)
Murphy, Michael T., Webb, J. K., Flambaum, Victor V.
Abstract not available.
Laser frequency combs for astronomical observations (2008)
Steinmetz, Tilo, Wilken, Tobias, Araujo-Hauck, Constanza, Holzwarth, Ronald, Hänsch, Theodor W., Pasquini, Luca, ...
A direct measurement of the universe's expansion history could be made by observing in real time the evolution of the cosmological redshift of distant objects. However, this would require...
Ca II and Na I absorption signatures from extraplanar gas in the halo of the Milky Way (2008)
Ben Bekhti, N., Richter, P., Westmeier, T, Murphy, Michael T.
We analyse absorption characteristics and physical conditions of extraplanar intermediate- and high-velocity gas to study the distribution of the neutral and weakly ionised Milky Way halo gas and its...
Pettini, Max, Zych, Berkeley J., Murphy, Michael T., Lewis, Antony M., Steidel, Charles C.
The most metal-poor damped Lyα system known to date, at z abs = 2.61843 in the spectrum of the QSO Q0913+072, with an oxygen abundance of only ∼1/250 of the solar value, shows six...
Stringent null constraint on cosmological evolution of the proton-to-electron mass ratio (2008)
King, Julian A., Webb, J. K., Murphy, Michael T., Carswell, R. F.
We present a strong constraint on variation of the proton-to-electron mass ratio mu over cosmological time scales using molecular hydrogen transitions in optical quasar spectra. Using high quality...
Halo gas cross sections and covering fractions of Mg II absorption selected galaxies (2008)
Kacprzak, Glenn G., Churchill, Christopher W., Steidel, Charles C., Murphy, Michael T.
We examine halo gas cross sections and covering fractions, fc , of intermediate-redshift Mg II absorption selected galaxies. We computed statistical absorber halo radii, Rx, using current values of...
Murphy, Michael T., Flambaum, Victor V., Muller, Sebastien, Henkel, Christian
The Standard Model of particle physics assumes that the so-called fundamental constants are universal and unchanging. Absorption lines arising in molecular clouds along quasar sightlines offer a...
Cosmic dynamics in the era of Extremely Large Telescopes (2008)
Liske, Jochen, Grazian, Andrea, Vanzella, Eros, Dessauges, Miroslava, Viel, Matteo, Pasquini, Luca, ...
The redshifts of all cosmologically distant sources are expected to experience a small, systematic drift as a function of time due to the evolution of the Universe's expansion rate. A measurement of...
Diffuse interstellar bands in z < 0.6 Ca ii absorbers (2008)
Ellison, Sara L., York, Brian A., Murphy, Michael T., Zych, Berkeley J., Smith, Arfon M., Sarre, Peter J.
The diffuse interstellar bands (DIBs) probably arise from complex organic molecules whose strength in local galaxies correlates with neutral hydrogen column density, N(H i), and dust reddening, E(...
Revisiting VLT/UVES constraints on a varying fine-structure constant (2008)
Murphy, Michael T., Webb, J. K., Flambaum, Victor V.
Abstract not available.
Murphy, Michael T., Flambaum, Victor V., Muller, Sebastien, Henkel, Christian
The Standard Model of particle physics assumes that the so-called fundamental constants are universal and unchanging. Absorption lines arising in molecular clouds along quasar sightlines offer a...
Laser frequency combs for astronomical observations (2008)
Steinmetz, Tilo, Wilken, Tobias, Araujo-Hauck, Constanza, Holzwarth, Ronald, Hänsch, Theodor W., Pasquini, Luca, ...
A direct measurement of the universe's expansion history could be made by observing in real time the evolution of the cosmological redshift of distant objects. However, this would require...
Ca II and Na I absorption signatures from extraplanar gas in the halo of the Milky Way (2008)
Ben Bekhti, N., Richter, P., Westmeier, T, Murphy, Michael T.
We analyse absorption characteristics and physical conditions of extraplanar intermediate- and high-velocity gas to study the distribution of the neutral and weakly ionised Milky Way halo gas and its...
Pettini, Max, Zych, Berkeley J., Murphy, Michael T., Lewis, Antony M., Steidel, Charles C.
The most metal-poor damped Lyα system known to date, at z abs = 2.61843 in the spectrum of the QSO Q0913+072, with an oxygen abundance of only ∼1/250 of the solar value, shows six well-resolved D...
Stringent null constraint on cosmological evolution of the proton-to-electron mass ratio (2008)
King, Julian A., Webb, John K., Murphy, Michael T., Carswell, Robert F.
We present a strong constraint on variation of the proton-to-electron mass ratio mu over cosmological time scales using molecular hydrogen transitions in optical quasar spectra. Using high quality...
Halo gas cross sections and covering fractions of Mg II absorption selected galaxies (2008)
Kacprzak, Glenn G., Churchill, Christopher W., Steidel, Charles C., Murphy, Michael T.
We examine halo gas cross sections and covering fractions, fc , of intermediate-redshift Mg II absorption selected galaxies. We computed statistical absorber halo radii, Rx, using current values of...
Dolan, Amy C., Murphy, Michael T., Redmond, Lucas J., Sexton, Karen, Duffield, Debbie
Effects of alternate mating strategies on the opportunity for sexual selection are widely debated, and recent studies have concluded that the effects of extrapair (EP) paternity on the opportunity...
Diffuse Interstellar Bands in z < 0.6 CaII Absorbers (2007)
Ellison, Sara L., York, Brian A., Murphy, Michael T., Zych, Berkeley J., Smith, Arfon M., Sarre, Peter J.
The diffuse interstellar bands (DIBs) probably arise from complex organic molecules whose strength in local galaxies correlates with neutral hydrogen column density, N(HI), and dust reddening,...
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Davies, Richard, Eisenhauer, Frank, Schreiber, Natasha Forster, ...
Low-ionization transitions such as the MgII 2796/2803 doublet trace cold gas in the vicinity of galaxies. It is not clear whether this gas is part of the interstellar medium of large proto-disks,...
Murphy, Michael T., Webb, John K., Flambaum, Victor V.
In their Letter [Phys. Rev. Lett. 92, 121302 (2004)] (also [Astron. Astrophys. 417, 853 (2004)]), Srianand et al. analysed optical spectra of heavy-element species in 23 absorption systems along...
The host galaxies of strong CaII QSO absorption systems at z (2007)
Zych, Berkeley J., Murphy, Michael T., Pettini, Max, Hewett, Paul C., Ryan-Weber, Emma V., Ellison, Sara L.
We present new imaging and spectroscopic observations of the fields of five QSOs with very strong intervening CaII absorption systems at redshifts z
A Correlation Between Galaxy Morphology and MgII Halo Absorption Strength (2007)
Kacprzak, Glenn G., Churchill, Christopher W., Steidel, Charles C., Murphy, Michael T., Evans, Jessica L.
(Abridged) We compared the quantified morphological properties of 37 intermediate redshift MgII absorption selected galaxies to the properties of the absorbing halo gas, observed in the spectra of...
Bouché, Nicolas, Murphy, Michael T., Péroux, Céline, Davies, Richard, Eisenhauer, Frank, Förster Schreiber, Natascha M., ...
Bouché, Nicolas, Murphy, Michael T., Péroux, Céline, Davies, Richard, Eisenhauer, Frank, Schreiber, Natascha M. Förster, ...
Low-ionization transitions such as the Mg ii λ2796/2803 doublet trace cold gas in the vicinity of galaxies. It is not clear whether this gas is part of the interstellar medium of large protodisks,...
Bouché, Nicolas, Murphy, Michael T., Péroux, Céline, Davies, Richard, Eisenhauer, Frank, Schreiber, Natascha M. Förster, ...
Low-ionization transitions such as the Mg ii λ2796/2803 doublet trace cold gas in the vicinity of galaxies. It is not clear whether this gas is part of the interstellar medium of large protodisks,...
Future wavelength calibration standards at ESO : the Laser Frequency Comb (2007)
Araujo-Hauck, Constanza, Pasquini, Luca, Manescau, Antonio, Udem, Thomas, Hänsch, Theodor W., Holzwarth, Ronald, ...
A new technique for precise wavelength calibration of high-resolution spectrographs using frequency combs has recently been proposed. After introducing the basic concepts and advantages of this...
Are strong Mg II absorbers the signature of outflows? (2007)
Bouché, Nicolas, Murphy, Michael T., Csabai, István, Wild, Vivienne
Abstract not available.
Are strong z equivalent to 0.5 MgII absorbers the signature of super-winds? (2007)
Bouché, Nicolas, Murphy, Michael T., Péroux, Celine, Csabai, István, Wild, Vivienne
In the process of galaxy formation, super-nova driven feedback from low-mass galaxies is the process that most readily account for the galaxy mass-metallicity relation and for the shallower galaxy...
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Davies, Richard, Eisenhauer, Frank, Schreiber, Natascha M. Foerster, ...
Low-ionization transitions such as the Mg II gamma 2796/2803 doublet trace cold gas in the vicinity of galaxies. It is not clear whether this gas is part of the interstellar medium of large...
Detection of broad 21-cm absorption at z(abs)=0.656 in the complex sight-line towards 3C 336 (2007)
Curran, Stephen J., Tzanavaris, Panayiotis, Murphy, Michael T., Webb, Jonathan K.
We report the detection of 21-cm absorption at z(abs) = 0.656 towards 1622 + 238 (3C 336). The line is very broad with a full width to half-maximum of 235 km s(-1), giving a velocity-integrated...
A correlation between galaxy morphology and Mg II halo absorption strength (2007)
Kacprzak, Glenn G., Churchill, Christopher W., Steidel, Charles C., Murphy, Michael T., Evans, Jessica L.
We compared the quantified morphological properties of 37 intermediate redshift Mg II absorption selected galaxies to the properties of the absorbing halo gas [ 0.03 angstrom
Murphy, Michael T., Udem, Thomas, Holzwarth, Ronald, Sizmann, Andreas, Pasquini, Luca, Araujo-Hauck, Costanza, ...
We describe a possible new technique for precise wavelength calibration of high-resolution astronomical spectrographs using femtosecond-pulsed mode-locked lasers controlled by stable oscillators such...
Murphy, Michael T., Webb, Jonathan K., Flambaum, Victor V.
A comment on the letter by R. Srianand et al., [Phys. Rev. Lett. 92, 121302 (2004)]. The authors of the letter offer a reply.
Tzanavaris, Panayiotis, Murphy, Michael T., Webb, Jonathan K., Flambaum, Victor V., Curran, Stephen J.
Nine quasar absorption spectra at 21-cm and ultraviolet (UV) rest-frame wavelengths are used to estimate possible variations in x equivalent to alpha(2)g(p)mu, where alpha is the fine structure...
The host galaxies of strong CaII quasar absorption systems at z < 0.5 (2007)
Zych, Berkeley J., Murphy, Michael T., Pettini, Max, Hewett, Paul C., Ryan-Weber, Emma V., Ellison, Sara L.
We present new imaging and spectroscopic observations of the fields of five quasars with very strong intervening Ca II absorption systems at redshifts z(abs) < 0.5 selected from the Sloan Digital Sky...
The connection between metallicity and metal-line kinematics in (sub-)damped Ly (2007)
Murphy, Michael T., Curran, Stephen J., Webb, Jonathan K., Ménager, H., Zych, Berkeley J.
Abstract not available.
Murphy, Michael T., Tzanavaris, Panayiotis, Webb, Jonathan K., Lovis, Christophe
Echelle spectrographs currently provide some of the most precise and detailed spectra in astronomy, the interpretation of which sometimes depends on the wavelength calibration accuracy. In some...
Bouché, Nicolas, Murphy, Michael T., Péroux, Céline, Davies, Richard, Eisenhauer, Frank, Schreiber, Natascha M. Förster, ...
Low-ionization transitions such as the Mg ii λ2796/2803 doublet trace cold gas in the vicinity of galaxies. It is not clear whether this gas is part of the interstellar medium of large protodisks,...
Future wavelength calibration standards at ESO : the Laser Frequency Comb (2007)
Araujo-Hauck, Constanza, Pasquini, Luca, Manescau, Antonio, Udem, Thomas, Hänsch, Theodor W., Holzwarth, Ronald, ...
A new technique for precise wavelength calibration of high-resolution spectrographs using frequency combs has recently been proposed. After introducing the basic concepts and advantages of this...
Are strong Mg II absorbers the signature of outflows? (2007)
Bouché, Nicolas, Murphy, Michael T., Csabai, István, Wild, Vivienne
Abstract not available.
Are strong z equivalent to 0.5 MgII absorbers the signature of super-winds? (2007)
Bouché, Nicolas, Murphy, Michael T., Péroux, Celine, Csabai, István, Wild, Vivienne
In the process of galaxy formation, super-nova driven feedback from low-mass galaxies is the process that most readily account for the galaxy mass-metallicity relation and for the shallower galaxy...
Bouche, Nicolas, Murphy, Michael T., Davies, Richard, Eisenhauer, Frank, Schreiber, Natascha M. Foerster, ...
Low-ionization transitions such as the Mg II gamma 2796/2803 doublet trace cold gas in the vicinity of galaxies. It is not clear whether this gas is part of the interstellar medium of large...
Detection of broad 21-cm absorption at z(abs)=0.656 in the complex sight-line towards 3C 336 (2007)
Curran, Stephen J., Tzanavaris, Panayiotis, Murphy, Michael T., Webb, Jonathan K.
We report the detection of 21-cm absorption at z(abs) = 0.656 towards 1622 + 238 (3C 336). The line is very broad with a full width to half-maximum of 235 km s(-1), giving a velocity-integrated...
A correlation between galaxy morphology and Mg II halo absorption strength (2007)
Kacprzak, Glenn G., Churchill, Christopher W., Steidel, Charles C., Murphy, Michael T., Evans, Jessica L.
We compared the quantified morphological properties of 37 intermediate redshift Mg II absorption selected galaxies to the properties of the absorbing halo gas [ 0.03 angstrom
Murphy, Michael T., Udem, Thomas, Holzwarth, Ronald, Sizmann, Andreas, Pasquini, Luca, Araujo-Hauck, Costanza, ...
We describe a possible new technique for precise wavelength calibration of high-resolution astronomical spectrographs using femtosecond-pulsed mode-locked lasers controlled by stable oscillators such...
Murphy, Michael T., Webb, Jonathan K., Flambaum, Victor V.
A comment on the letter by R. Srianand et al., [Phys. Rev. Lett. 92, 121302 (2004)]. The authors of the letter offer a reply.
Tzanavaris, Panayiotis, Murphy, Michael T., Webb, Jonathan K., Flambaum, Victor V., Curran, Stephen J.
Nine quasar absorption spectra at 21-cm and ultraviolet (UV) rest-frame wavelengths are used to estimate possible variations in x equivalent to alpha(2)g(p)mu, where alpha is the fine structure...
The host galaxies of strong CaII quasar absorption systems at z < 0.5 (2007)
Zych, Berkeley J., Murphy, Michael T., Pettini, Max, Hewett, Paul C., Ryan-Weber, Emma V., Ellison, Sara L.
We present new imaging and spectroscopic observations of the fields of five quasars with very strong intervening Ca II absorption systems at redshifts z(abs) < 0.5 selected from the Sloan Digital Sky...
The connection between metallicity and metal-line kinematics in (sub-)damped Ly (2007)
Murphy, Michael T., Curran, Stephen J., Webb, Jonathan K., Ménager, H., Zych, Berkeley J.
Abstract not available.
Murphy, Michael T., Tzanavaris, Panayiotis, Webb, Jonathan K., Lovis, Christophe
Echelle spectrographs currently provide some of the most precise and detailed spectra in astronomy, the interpretation of which sometimes depends on the wavelength calibration accuracy. In some...
Bouché, Nicolas, Murphy, Michael T., Péroux, Céline, Davies, Richard, Eisenhauer, Frank, Schreiber, Natascha M. Förster, ...
Low-ionization transitions such as the Mg ii λ2796/2803 doublet trace cold gas in the vicinity of galaxies. It is not clear whether this gas is part of the interstellar medium of large protodisks,...
Are strong z equivalent to 0.5 MgII absorbers the signature of super-winds? (2007)
Bouché, Nicolas, Murphy, Michael T., Péroux, Celine, Csabai, István, Wild, Vivienne
In the process of galaxy formation, super-nova driven feedback from low-mass galaxies is the process that most readily account for the galaxy mass-metallicity relation and for the shallower galaxy...
Are strong Mg II absorbers the signature of outflows? (2007)
Bouché, Nicolas, Murphy, Michael T., Csabai, István, Wild, Vivienne
Abstract not available.
Bouche, Nicolas, Murphy, Michael T., Davies, Richard, Eisenhauer, Frank, Schreiber, Natascha M. Foerster, ...
Low-ionization transitions such as the Mg II gamma 2796/2803 doublet trace cold gas in the vicinity of galaxies. It is not clear whether this gas is part of the interstellar medium of large...
Detection of broad 21-cm absorption at z(abs)=0.656 in the complex sight-line towards 3C 336 (2007)
Curran, Stephen J., Tzanavaris, Panayiotis, Murphy, Michael T., Webb, Jonathan K.
We report the detection of 21-cm absorption at z(abs) = 0.656 towards 1622 + 238 (3C 336). The line is very broad with a full width to half-maximum of 235 km s(-1), giving a velocity-integrated...
Future wavelength calibration standards at ESO : the Laser Frequency Comb (2007)
Araujo-Hauck, Constanza, Pasquini, Luca, Manescau, Antonio, Udem, Thomas, Hänsch, Theodor W., Holzwarth, Ronald, ...
A new technique for precise wavelength calibration of high-resolution spectrographs using frequency combs has recently been proposed. After introducing the basic concepts and advantages of this...
Tzanavaris, Panayiotis, Murphy, Michael T., Webb, Jonathan K., Flambaum, Victor V., Curran, Stephen J.
Nine quasar absorption spectra at 21-cm and ultraviolet (UV) rest-frame wavelengths are used to estimate possible variations in x equivalent to alpha(2)g(p)mu, where alpha is the fine structure...
A correlation between galaxy morphology and Mg II halo absorption strength (2007)
Kacprzak, Glenn G., Churchill, Christopher W., Steidel, Charles C., Murphy, Michael T., Evans, Jessica L.
We compared the quantified morphological properties of 37 intermediate redshift Mg II absorption selected galaxies to the properties of the absorbing halo gas [ 0.03 angstrom
The connection between metallicity and metal-line kinematics in (sub-)damped Ly (2007)
Murphy, Michael T., Curran, Stephen J., Webb, Jonathan K., Ménager, H., Zych, Berkeley J.
Abstract not available.
The host galaxies of strong CaII quasar absorption systems at z < 0.5 (2007)
Zych, Berkeley J., Murphy, Michael T., Pettini, Max, Hewett, Paul C., Ryan-Weber, Emma V., Ellison, Sara L.
We present new imaging and spectroscopic observations of the fields of five quasars with very strong intervening Ca II absorption systems at redshifts z(abs) < 0.5 selected from the Sloan Digital Sky...
Murphy, Michael T., Tzanavaris, Panayiotis, Webb, Jonathan K., Lovis, Christophe
Echelle spectrographs currently provide some of the most precise and detailed spectra in astronomy, the interpretation of which sometimes depends on the wavelength calibration accuracy. In some...
Murphy, Michael T., Udem, Thomas, Holzwarth, Ronald, Sizmann, Andreas, Pasquini, Luca, Araujo-Hauck, Costanza, ...
We describe a possible new technique for precise wavelength calibration of high-resolution astronomical spectrographs using femtosecond-pulsed mode-locked lasers controlled by stable oscillators such...
Murphy, Michael T., Webb, Jonathan K., Flambaum, Victor V.
A comment on the letter by R. Srianand et al., [Phys. Rev. Lett. 92, 121302 (2004)]. The authors of the letter offer a reply.
Are strong z equivalent to 0.5 MgII absorbers the signature of super-winds? (2007)
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Csabai, Istvan, Wild, Vivienne
In the process of galaxy formation, super-nova driven feedback from low-mass galaxies is the process that most readily account for the galaxy mass-metallicity relation and for the shallower galaxy...
Are strong Mg II absorbers the signature of outflows? (2007)
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Csabai, Istvan, Wild, Vivienne
Abstract not available.
Detection of broad 21-cm absorption at z(abs)=0.656 in the complex sight-line towards 3C 336 (2007)
Curran, Stephen J., Tzanavaris, Panayiotis, Murphy, Michael T., Webb, J. K., Pihlstrom, Ylva M.
We report the detection of 21-cm absorption at z(abs) = 0.656 towards 1622 + 238 (3C 336). The line is very broad with a full width to half-maximum of 235 km s(-1), giving a velocity-integrated...
A correlation between galaxy morphology and Mg II halo absorption strength (2007)
Kacprzak, Glenn G., Churchill, Christopher W., Steidel, Charles C., Murphy, Michael T., Evans, Jessica L.
We compared the quantified morphological properties of 37 intermediate redshift Mg II absorption selected galaxies to the properties of the absorbing halo gas [ 0.03 angstrom
The connection between metallicity and metal-line kinematics in (sub-)damped Ly (2007)
Murphy, Michael T., Curran, Stephen J., Webb, J. K., Menager, H., Zych, Berkeley J.
Abstract not available.
Murphy, Michael T., Tzanavaris, Panayiotis, Webb, J. K., Lovis, Christophe
Echelle spectrographs currently provide some of the most precise and detailed spectra in astronomy, the interpretation of which sometimes depends on the wavelength calibration accuracy. In some...
Murphy, Michael T., Udem, Thomas, Holzwarth, Ronald, Sizmann, Andreas, Pasquini, Luca, Araujo-Hauck, Costanza, ...
We describe a possible new technique for precise wavelength calibration of high-resolution astronomical spectrographs using femtosecond-pulsed mode-locked lasers controlled by stable oscillators such...
Murphy, Michael T., Webb, J. K., Flambaum, Victor V.
A comment on the letter by R. Srianand et al., [Phys. Rev. Lett. 92, 121302 (2004)]. The authors of the letter offer a reply.
Tzanavaris, Panayiotis, Murphy, Michael T., Webb, J. K., Flambaum, Victor V., Curran, Stephen J.
Nine quasar absorption spectra at 21-cm and ultraviolet (UV) rest-frame wavelengths are used to estimate possible variations in x equivalent to alpha(2)g(p)mu, where alpha is the fine structure...
The host galaxies of strong CaII quasar absorption systems at z < 0.5 (2007)
Zych, Berkeley J., Murphy, Michael T., Pettini, Max, Hewett, Paul C., Ryan-Weber, Emma V., Ellison, Sara L.
We present new imaging and spectroscopic observations of the fields of five quasars with very strong intervening Ca II absorption systems at redshifts z(abs) < 0.5 selected from the Sloan Digital Sky...
Future wavelength calibration standards at ESO : the Laser Frequency Comb (2007)
Araujo-Hauck, Constanza, Pasquini, Luca, Manescau, Antonio, Udem, Thomas, Hänsch, Theodor W., Holzwarth, Ronald, ...
A new technique for precise wavelength calibration of high-resolution spectrographs using frequency combs has recently been proposed. After introducing the basic concepts and advantages of this...
The CODEX-ESPRESSO experiment: cosmic dynamics, fundamental physics, planets and much more (2007)
Cristiani, Stefano, Avila, Gerardo, Bonifacio, Piercarlo, Bouchy, Francois, Carswell, B., D'Odorico, Sandro D., ...
CODEX, a high-resolution, super-stable spectrograph to be fed by the E-ELT, the most powerful telescope ever conceived, will for the first time provide the possibility of directly measuring the...
Bouché, Nicolas, Murphy, Michael T., Péroux, Céline, Davies, Richard, Eisenhauer, Frank, Schreiber, Natascha M. Förster, ...
Low-ionization transitions such as the Mg ii λ2796/2803 doublet trace cold gas in the vicinity of galaxies. It is not clear whether this gas is part of the interstellar medium of large protodisks,...
Are strong z equivalent to 0.5 MgII absorbers the signature of super-winds? (2007)
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Csabai, Istvan, Wild, Vivienne
In the process of galaxy formation, super-nova driven feedback from low-mass galaxies is the process that most readily account for the galaxy mass-metallicity relation and for the shallower galaxy...
Are strong Mg II absorbers the signature of outflows? (2007)
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Csabai, Istvan, Wild, Vivienne
Abstract not available.
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Davies, Richard, Eisenhauer, Frank, Schreiber, Natascha M. Foerster, ...
Low-ionization transitions such as the Mg II gamma 2796/2803 doublet trace cold gas in the vicinity of galaxies. It is not clear whether this gas is part of the interstellar medium of large...
Detection of broad 21-cm absorption at z(abs)=0.656 in the complex sight-line towards 3C 336 (2007)
Curran, Stephen J., Tzanavaris, Panayiotis, Murphy, Michael T., Webb, J. K., Pihlstrom, Ylva M.
We report the detection of 21-cm absorption at z(abs) = 0.656 towards 1622 + 238 (3C 336). The line is very broad with a full width to half-maximum of 235 km s(-1), giving a velocity-integrated...
A correlation between galaxy morphology and Mg II halo absorption strength (2007)
Kacprzak, Glenn G., Churchill, Christopher W., Steidel, Charles C., Murphy, Michael T., Evans, Jessica L.
We compared the quantified morphological properties of 37 intermediate redshift Mg II absorption selected galaxies to the properties of the absorbing halo gas [ 0.03 angstrom
The connection between metallicity and metal-line kinematics in (sub-)damped Ly (2007)
Murphy, Michael T., Curran, Stephen J., Webb, J. K., Menager, H., Zych, Berkeley J.
Abstract not available.
Murphy, Michael T., Tzanavaris, Panayiotis, Webb, J. K., Lovis, Christophe
Echelle spectrographs currently provide some of the most precise and detailed spectra in astronomy, the interpretation of which sometimes depends on the wavelength calibration accuracy. In some...
Murphy, Michael T., Udem, Thomas, Holzwarth, Ronald, Sizmann, Andreas, Pasquini, Luca, Araujo-Hauck, Costanza, ...
We describe a possible new technique for precise wavelength calibration of high-resolution astronomical spectrographs using femtosecond-pulsed mode-locked lasers controlled by stable oscillators such...
Murphy, Michael T., Webb, J. K., Flambaum, Victor V.
A comment on the letter by R. Srianand et al., [Phys. Rev. Lett. 92, 121302 (2004)]. The authors of the letter offer a reply.
Tzanavaris, Panayiotis, Murphy, Michael T., Webb, J. K., Flambaum, Victor V., Curran, Stephen J.
Nine quasar absorption spectra at 21-cm and ultraviolet (UV) rest-frame wavelengths are used to estimate possible variations in x equivalent to alpha(2)g(p)mu, where alpha is the fine structure...
The host galaxies of strong CaII quasar absorption systems at z < 0.5 (2007)
Zych, Berkeley J., Murphy, Michael T., Pettini, Max, Hewett, Paul C., Ryan-Weber, Emma V., Ellison, Sara L.
We present new imaging and spectroscopic observations of the fields of five quasars with very strong intervening Ca II absorption systems at redshifts z(abs) < 0.5 selected from the Sloan Digital Sky...
Future wavelength calibration standards at ESO : the Laser Frequency Comb (2007)
Araujo-Hauck, Constanza, Pasquini, Luca, Manescau, Antonio, Udem, Thomas, Hänsch, Theodor W., Holzwarth, Ronald, ...
A new technique for precise wavelength calibration of high-resolution spectrographs using frequency combs has recently been proposed. After introducing the basic concepts and advantages of this...
The CODEX-ESPRESSO experiment: cosmic dynamics, fundamental physics, planets and much more (2007)
Cristiani, Stefano, Avila, Gerardo, Bonifacio, Piercarlo, Bouchy, Francois, Carswell, B., D'Odorico, Sandro D., ...
CODEX, a high-resolution, super-stable spectrograph to be fed by the E-ELT, the most powerful telescope ever conceived, will for the first time provide the possibility of directly measuring the...
Revision of VLT/UVES constraints on a varying fine-structure constant (2006)
Murphy, Michael T., Webb, John K., Flambaum, Victor V.
We critically review the current null results on a varying fine-structure constant, alpha, derived from VLT/UVES quasar absorption spectra, focusing primarily on the many-multiplet analysis of 23...
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Csabai, Istvan, Wild, Vivienne
We measure the mean halo-mass of z=0.5 MgII absorbers using the cross-correlation (over co-moving scales 0.05-13h^{-1}Mpc) between 1806 MgII quasar absorption systems and ~250,000 Luminous Red...
Exploring variations in the fundamental constants with ELTs: The CODEX spectrograph on OWL (2006)
Molaro, Paolo, Murphy, Michael T., Levshakov, Sergei, Di Trieste, Osservatorio Astronomico, ...
Cosmological variations in the fine structure constant, alpha, can be probed through precise velocity measurements of metallic absorption lines from intervening gas clouds seen in spectra of distant...
A CH3CN and HCO+ survey towards southern methanol masers associated with star formation (2006)
Purcell, Cormac R., Balasubramanyam, Ramesh, Burton, Michael G., Walsh, Andrew J., Minier, Vincent, Hunt-Cunningham, Maria R., ...
We present the initial results of a 3-mm spectral-line survey towards 83 methanol maser-selected massive star-forming regions. Here, we report observations of the J Combining double low line 5-4 and...
A CH3CN and HCO+ survey towards southern methanol masers associated with star formation (2006)
Purcell, Cormac R., Balasubramanyam, Ramesh, Burton, Michael G., Walsh, Andrew J., Minier, Vincent, Hunt-Cunningham, Maria R., ...
We present the initial results of a 3-mm spectral-line survey towards 83 methanol maser-selected massive star-forming regions. Here, we report observations of the J Combining double low line 5-4 and...
A CH3CN and HCO+ survey towards southern methanol masers associated with star formation (2006)
Purcell, Cormac R., Balasubramanyam, Ramesh, Burton, Michael G., Walsh, Andrew J., Minier, Vincent, Hunt-Cunningham, Maria R., ...
We present the initial results of a 3-mm spectral-line survey towards 83 methanol maser-selected massive star-forming regions. Here, we report observations of the J Combining double low line 5-4 and...
A CH3CN and HCO+ survey towards southern methanol masers associated with star formation (2006)
Purcell, Cormac R., Balasubramanyam, Ramesh, Burton, Michael G., Walsh, Andrew J., Minier, Vincent, Hunt-Cunningham, Maria R., ...
We present the initial results of a 3-mm spectral-line survey towards 83 methanol maser-selected massive star-forming regions. Here, we report observations of the J Combining double low line 5-4 and...
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Csabai, Istvan, Wild, Vivienne
We measure the mean halo mass of z ≃ 0.5 Mg II absorbers using the cross-correlation (over comoving scales 0.05-13 h-1 Mpc) between 1806 Mg II quasar absorption systems and ∼250 000...
Aldenius, M., Johansson, Sveneric G., Murphy, Michael T.
The most precise method of investigating possible space–time variations of the fine-structure constant, α≡ (1/ħc)(e2/4πε0) , using high-redshift quasar absorption...
Curran, Stephen J., Whiting, Matthew T., Murphy, Michael T., Webb, J. K., Longmore, Steven N., Pihlstrom, Ylva M., ...
We are currently undertaking a large survey for redshifted atomic and molecular absorption lines at radio frequencies. In this paper, we present the results from the first phase of this survey: the...
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Csabai, Istvan, Wild, Vivienne
We measure the mean halo mass of z ≃ 0.5 Mg II absorbers using the cross-correlation (over comoving scales 0.05-13 h-1 Mpc) between 1806 Mg II quasar absorption systems and ∼250 000...
Aldenius, M., Johansson, Sveneric G., Murphy, Michael T.
The most precise method of investigating possible space–time variations of the fine-structure constant, α≡ (1/ħc)(e2/4πε0) , using high-redshift quasar absorption...
Curran, Stephen J., Whiting, Matthew T., Murphy, Michael T., Webb, Jonathan K., Longmore, Steven N., Pihlstrom, Ylva M., ...
We are currently undertaking a large survey for redshifted atomic and molecular absorption lines at radio frequencies. In this paper, we present the results from the first phase of this survey: the...
A CH3CN and HCO+ survey towards southern methanol masers associated with star formation (2006)
Purcell, Cormac R., Balasubramanyam, Ramesh, Burton, Michael G., Walsh, Andrew J., Minier, Vincent, Hunt-Cunningham, Maria R., ...
We present the initial results of a 3-mm spectral-line survey towards 83 methanol maser-selected massive star-forming regions. Here, we report observations of the J Combining double low line 5-4 and...
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Csabai, Istvan, Wild, Vivienne
We measure the mean halo mass of z ≃ 0.5 Mg II absorbers using the cross-correlation (over comoving scales 0.05-13 h-1 Mpc) between 1806 Mg II quasar absorption systems and ∼250 000...
Aldenius, M., Johansson, Sveneric G., Murphy, Michael T.
The most precise method of investigating possible space–time variations of the fine-structure constant, α≡ (1/ħc)(e2/4πε0) , using high-redshift quasar absorption...
Curran, Stephen J., Whiting, Matthew T., Murphy, Michael T., Webb, J. K., Longmore, Steven N., Pihlstrom, Ylva M., ...
We are currently undertaking a large survey for redshifted atomic and molecular absorption lines at radio frequencies. In this paper, we present the results from the first phase of this survey: the...
CODEX : measuring the expansion of the universe (2005)
Pasquini, Luca, Cristiani, Stefano, Dekker, Hans, Haehnelt, Martin, Molaro, Paolo, Pepe, Francesco, ...
CODEX, a high-resolution, super-stable spectrograph to be fed by OWL, the most powerful telescope ever conceived, will for the first time provide the possibility of directly measuring the change of...
Deep searches for high redshift molecular absorption (2005)
Curran, Stephen J., Webb, J. K., Murphy, Michael T., Kuno, N.
Millimetre-band scans of the frequency space towards optically dim quasars is potentially a highly efficient method for detecting new high redshift molecular absorption systems. Here we describe...
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Csabai, Istvan
Abstract not available.
Spin temperatures and covering factors for HI 21-cm absorption in damped Lyman α systems (2005)
Curran, Stephen J., Murphy, Michael T., Pihlstrom, Ylva M., Webb, J. K., Purcell, Cormac R.
We investigate the practice of assigning high spin temperatures to damped Lyman α absorption systems (DLAs) not detected in H i 21-cm absorption. In particular, Kanekar & Chengalur have attributed...
CODEX : measuring the expansion of the universe (2005)
Pasquini, Luca, Cristiani, Stefano, Dekker, Hans, Haehnelt, Martin, Molaro, Paolo, Pepe, Francesco, ...
CODEX, a high-resolution, super-stable spectrograph to be fed by OWL, the most powerful telescope ever conceived, will for the first time provide the possibility of directly measuring the change of...
Deep searches for high redshift molecular absorption (2005)
Curran, Stephen J., Webb, Jonathan K., Murphy, Michael T., Kuno, N.
Millimetre-band scans of the frequency space towards optically dim quasars is potentially a highly efficient method for detecting new high redshift molecular absorption systems. Here we describe...
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Csabai, Istvan
Abstract not available.
Spin temperatures and covering factors for HI 21-cm absorption in damped Lyman α systems (2005)
Curran, Stephen J., Murphy, Michael T., Pihlstrom, Ylva M., Webb, Jonathan K., Purcell, Cormac R.
We investigate the practice of assigning high spin temperatures to damped Lyman α absorption systems (DLAs) not detected in H i 21-cm absorption. In particular, Kanekar & Chengalur have...
Exploring variations in the fundamental constants with ELTs: the CODEX spectrograph on OWL (2005)
Molaro, Paolo, Murphy, Michael T., Levshakov, Sergei A.
Cosmological variations in the fine structure constant, α, can be probed through precise velocity measurements of metallic absorption lines from intervening gas clouds seen in spectra of...
Tzanavaris, Panayiotis, Webb, J. K., Murphy, Michael T., Flambaum, Victor V., Curran, Stephen J.
Abstract not available.
Exploring variations in the fundamental constants with ELTs: the CODEX spectrograph on OWL (2005)
Molaro, Paolo, Murphy, Michael T., Levshakov, Sergei A.
Cosmological variations in the fine structure constant, α, can be probed through precise velocity measurements of metallic absorption lines from intervening gas clouds seen in spectra of...
Tzanavaris, Panayiotis, Webb, Jonathan K., Murphy, Michael T., Flambaum, Victor V., Curran, Stephen J.
Abstract not available.
CODEX : measuring the expansion of the universe (2005)
Pasquini, Luca, Cristiani, Stefano, Dekker, Hans, Haehnelt, Martin, Molaro, Paolo, Pepe, Francesco, ...
CODEX, a high-resolution, super-stable spectrograph to be fed by OWL, the most powerful telescope ever conceived, will for the first time provide the possibility of directly measuring the change of...
Deep searches for high redshift molecular absorption (2005)
Curran, Stephen J., Webb, J. K., Murphy, Michael T., Kuno, N.
Millimetre-band scans of the frequency space towards optically dim quasars is potentially a highly efficient method for detecting new high redshift molecular absorption systems. Here we describe...
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine, Csabai, Istvan
Abstract not available.
Spin temperatures and covering factors for HI 21-cm absorption in damped Lyman α systems (2005)
Curran, Stephen J., Murphy, Michael T., Pihlstrom, Ylva M., Webb, J. K., Purcell, Cormac R.
We investigate the practice of assigning high spin temperatures to damped Lyman α absorption systems (DLAs) not detected in H i 21-cm absorption. In particular, Kanekar & Chengalur have attributed...
Exploring variations in the fundamental constants with ELTs: the CODEX spectrograph on OWL (2005)
Molaro, Paolo, Murphy, Michael T., Levshakov, Sergei A.
Cosmological variations in the fine structure constant, α, can be probed through precise velocity measurements of metallic absorption lines from intervening gas clouds seen in spectra of...
Tzanavaris, Panayiotis, Webb, J. K., Murphy, Michael T., Flambaum, Victor V., Curran, Stephen J.
Abstract not available.
Biogeography of the birds of the Bahamas with special reference to the island of San Salvador (2004)
Michael T. Murphy, Jonathan Zysik, Aaron Pierce
We used original data (mist net captures) from San Salvador and Andros Island and literature sources for 19 islands in the Bahamas to conduct a biogeographic analysis of the permanent resident,...
Atomic and molecular absorption at high redshift (2004)
Curran, Stephen J., Webb, J. K., Murphy, Michael T., Pihlstrom, Ylva M.
Strong constraints on possible variations in fundamental constants can be derived from HI 21-cm and molecular rotational absorption lines observed towards quasars. With the aim of forming a...
Cosmological evolution of heavy-element and H-2 abundances (2004)
Curran, Stephen J., Webb, J. K., Murphy, Michael T., Carswell, R. F.
Spectroscopic observations of distant quasars have resulted in the detection of molecular hydrogen in intervening damped Lyman alpha absorption clouds (DLAs). We use observations compiled from...
Murphy, Michael T., Liske, Jochen
We use Sloan Digital Sky Survey (SDSS) Data Release 2 quasi-stellar object (QSO) spectra to constrain the dust-reddening caused by intervening damped Lyman alpha systems (DLAs). Comparing the...
Molecular fraction limits in damped Lyman alpha absorption systems (2004)
Curran, Stephen J., Murphy, Michael T., Pihlstrom, Ylva M., Webb, J. K., Bolatto, A. D., Bower, Geoffrey C.
We have used the Green Bank Telescope (GBT) and Berkeley-Illinois-Maryland Association (BIMA) array to search for redshifted millimetre absorption in a sample of damped Lyman alpha absorption systems...
H-2-bearing damped Lyman-alpha systems as tracers of cosmological chemical evolution (2004)
Murphy, Michael T., Curran, Stephen J., Webb, J. K.
The chemical abundances in damped Lyman-alpha systems (DLAs) show more than 2 orders of magnitude variation at a given epoch, possibly because DLAs arise in a wide variety of host galaxies. This...
The clustering of luminous red galaxies around MgII absorbers (2004)
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine
We study the cross-correlation between 212 Mg ii quasar absorption systems and ∼20 000 luminous red galaxies (LRGs) selected from the Sloan Digital Sky Survey Data Release 1 in the redshift...
Murphy, Michael T., Flambaum, Victor V., Webb, J. K., Dzuba, Vladimir V., Prochaska, Jason X., Wolfe, Arthur M.
We present evidence for variations in the fine-structure constant from Keck/HIRES spectra of 143 quasar absorption systems over the redshift range 0.2 < zabs < 4.2. This includes 15 new systems,...
Atomic and molecular absorption at high redshift (2004)
Curran, Stephen J., Webb, J. K., Murphy, Michael T., Pihlstrom, Ylva M.
Strong constraints on possible variations in fundamental constants can be derived from HI 21-cm and molecular rotational absorption lines observed towards quasars. With the aim of forming a...
Cosmological evolution of heavy-element and H-2 abundances (2004)
Curran, Stephen J., Webb, J. K., Murphy, Michael T., Carswell, R. F.
Spectroscopic observations of distant quasars have resulted in the detection of molecular hydrogen in intervening damped Lyman alpha absorption clouds (DLAs). We use observations compiled from...
Murphy, Michael T., Liske, Jochen
We use Sloan Digital Sky Survey (SDSS) Data Release 2 quasi-stellar object (QSO) spectra to constrain the dust-reddening caused by intervening damped Lyman alpha systems (DLAs). Comparing the...
Molecular fraction limits in damped Lyman alpha absorption systems (2004)
Curran, Stephen J., Murphy, Michael T., Pihlstrom, Ylva M., Webb, J. K., Bolatto, A. D., Bower, Geoffrey C.
We have used the Green Bank Telescope (GBT) and Berkeley-Illinois-Maryland Association (BIMA) array to search for redshifted millimetre absorption in a sample of damped Lyman alpha absorption systems...
H-2-bearing damped Lyman-alpha systems as tracers of cosmological chemical evolution (2004)
Murphy, Michael T., Curran, Stephen J., Webb, J. K.
The chemical abundances in damped Lyman-alpha systems (DLAs) show more than 2 orders of magnitude variation at a given epoch, possibly because DLAs arise in a wide variety of host galaxies. This...
The clustering of luminous red galaxies around MgII absorbers (2004)
Bouche, Nicolas, Murphy, Michael T., Peroux, Celine
We study the cross-correlation between 212 Mg ii quasar absorption systems and ∼20 000 luminous red galaxies (LRGs) selected from the Sloan Digital Sky Survey Data Release 1 in the redshift...
Murphy, Michael T., Flambaum, Victor V., Webb, J. K., Dzuba, Vladimir V., Prochaska, Jason X., Wolfe, Arthur M.
We present evidence for variations in the fine-structure constant from Keck/HIRES spectra of 143 quasar absorption systems over the redshift range 0.2 < zabs < 4.2. This includes 15 new systems,...
Cosmological Evolution of Heavy Element and Molecular Hydrogen Abundances (2003)
Curran, Stephen J., Webb, John K., Murphy, Michael T., Carswell, Robert F.
Spectroscopic observations of distant quasars have resulted in the detection of molecular hydrogen in intervening damped Lyman-alpha absorption clouds (DLAs). We use observations compiled from...
Webb, J. K., Murphy, Michael T., Flambaum, Victor V., Curran, Stephen J.
We report results from a third sample of quasar absorption line spectra from the Keck telescope which has been studied to search for any possible variation of the fine structure constant, α. This...
A 22-GHz search for molecular absorption at z similar to 3 with the upgraded ATCA (2003)
Curran, Stephen J., Murphy, Michael T., Webb, J. K., Pihlstrom, Ylva M.
We report a λ. ≲ 1 cm search for rotational molecular absorption towards quasars, now possible with the upgraded Australia Telescope Compact Array (ATCA). The targets were PKS 0201+113, PKS...
Webb, J. K., Murphy, Michael T., Flambaum, Victor V., Curran, Stephen J.
We report results from a third sample of quasar absorption line spectra from the Keck telescope which has been studied to search for any possible variation of the fine structure constant, α. This...
A 22-GHz search for molecular absorption at z similar to 3 with the upgraded ATCA (2003)
Curran, Stephen J., Murphy, Michael T., Webb, J. K., Pihlstrom, Ylva M.
We report a λ. ≲ 1 cm search for rotational molecular absorption towards quasars, now possible with the upgraded Australia Telescope Compact Array (ATCA). The targets were PKS 0201+113, PKS...
Probing variations in the fundamental constants with quasar absorption lines (2002)
Precision cosmology challenges many aspects of fundamental physics. In particular, quasar absorption lines test the assumed constancy of fundamental constants over cosmological time-scales and...
Probing variations in the fundamental constants with quasar absorption lines (2002)
Precision cosmology challenges many aspects of fundamental physics. In particular, quasar absorption lines test the assumed constancy of fundamental constants over cosmological time-scales...
Probing variations in the fundamental constants with quasar absorption lines (2002)
Precision cosmology challenges many aspects of fundamental physics. In particular, quasar absorption lines test the assumed constancy of fundamental constants over cosmological time-scales...
Probing variations in the fundamental constants with quasar absorption lines (2002)
Precision cosmology challenges many aspects of fundamental physics. In particular, quasar absorption lines test the assumed constancy of fundamental constants over cosmological time-scales...
Probing variations in the fundamental constants with quasar absorption lines (2002)
Precision cosmology challenges many aspects of fundamental physics. In particular, quasar absorption lines test the assumed constancy of fundamental constants over cosmological time-scales...
Probing variations in the fundamental constants with quasar absorption lines (2002)
Precision cosmology challenges many aspects of fundamental physics. In particular, quasar absorption lines test the assumed constancy of fundamental constants over cosmological time-scales...
Probing variations in the fundamental constants with quasar absorption lines (2002)
Precision cosmology challenges many aspects of fundamental physics. In particular, quasar absorption lines test the assumed constancy of fundamental constants over cosmological time-scales and...
A search for molecules in damped Lyman-alpha absorbers occulting millimetre-loud quasars (2002)
Curran, Stephen J., Murphy, Michael T., Webb, J. K., Rantakyro, Fredrik T., Johansson, L. E. B., Nikolic, Silvana
We have used the SEST 15-metre and Onsala 20-metre telescopes to perform deep (rms ≳ 30 mJy) integrations of various molecular rotational transitions towards damped Lyman-alpha absorption...
Time evolution of the fine structure constant (2002)
Murphy, Michael T., Webb, J. K., Flambaum, Victor V., Curran, Stephen J.
We present a short review of the current quasar (QSO) absorption line constraints on possible variation of the fine structure constant, α ≡ e2/¯hc. Particular attention is paid to...
A search for molecules in damped Lyman-alpha absorbers occulting millimetre-loud quasars (2002)
Curran, Stephen J., Murphy, Michael T., Webb, J. K., Rantakyro, Fredrik T., Johansson, L. E. B., Nikolic, Silvana
We have used the SEST 15-metre and Onsala 20-metre telescopes to perform deep (rms ≳ 30 mJy) integrations of various molecular rotational transitions towards damped Lyman-alpha absorption systems...
Time evolution of the fine structure constant (2002)
Murphy, Michael T., Webb, J. K., Flambaum, Victor V., Curran, Stephen J.
We present a short review of the current quasar (QSO) absorption line constraints on possible variation of the fine structure constant, α ≡ e2/¯hc. Particular attention is paid to...
High Frequency of Extra-Pair Paternity in Eastern Kingbirds (2001)
Diane L. Rowe, Michael T. Murphy, Robert C. Fleischer, Paul G. Wolf
Genetic parentage in the socially monogamous and territorial Eastern Kingbird (Tyrannus tyrannus) was examined in a central New York population by multilocus DNA fingerprinting. Extra-pair young were...
Relativistic corrections in atoms and space-time variation of the fine structure constant (2001)
Dzuba, V. A., Flambaum, Victor V., Murphy, Michael T., Webb, J. K.
Comparison of quasar absorption line spectra with laboratory spectra provides the best probe for variability of the fine structure constant, α = e 2/ħc, over cosmological time-scales. We...
Relativistic corrections in atoms and space-time variation of the fine structure constant (2001)
Dzuba, V. A., Flambaum, Victor V., Murphy, Michael T., Webb, J. K.
Comparison of quasar absorption line spectra with laboratory spectra provides the best probe for variability of the fine structure constant, α = e 2/ħc, over cosmological time-scales. We...
IS REPRODUCTION BY TREE SWALLOWS COST FREE? (2000)
Michael T. Murphy, Brian Armbrecth, Ekaterini Vlamis, Aaron Pierce
Catalogue of candidate emission-line objects in the Small Magellanic Cloud (1999)
Murphy, Michael T., Bessell, Michael S.
H\alpha and [O III] narrow band, wide field (7 * 7 degree), CCD images of the Small Magellanic Cloud were compared and a catalogue of candidate planetary nebulae and H\alpha emission-line stars was...
Costs and benefits of parental care in eastern kingbirds (1997)
Maigret, Jennifer L., Murphy, Michael T.
We manipulated brood sizes of eastern kingbirds (Tyrannus tyrannus) to measure the costs and benefits of parental care and to test whether kingbirds showed evidence of individual optimization of...
Structuring Technology Outsourcing Relationships: Customer Concerns, Strategies And Processes (1996)
NAGEL, TREVOR W., MURPHY, MICHAEL T.
Outsourcing information technology is an increasingly appealing option for corporations who seek to focus their resources on core activities by shedding responsibility for data processing and related...
Vita.
Thesis (Ph. D.)--University of Kansas, Systematics and Ecology, 1985.
Thesis (M.A.)--University of Kansas, Systematics and Ecology, 1981.