QSO Selection and Photometric Redshifts with Neural Networks (2009)
Yeche, Ch., Petitjean, P., Rich, J., Aubourg, E., Busca, N., Hamilton, J. -Ch., ...
Baryonic Acoustic Oscillations (BAO) and their effects on the matter power spectrum can be studied by using the Lyman-alpha absorption signature of the matter density field along quasar (QSO) lines...
Optical identification of XMM sources in the CFHTLS (2009)
Stalin, C. S., Petitjean, P., Srianand, R., Fox, A. J., Coppolani, F., Schwope, A.
We present optical spectroscopic identifications of X-ray sources in ~3 square degrees of the XMM-Large Scale Structure survey (XMM-LSS), also covered by the Canada France Hawaii Telescope Legacy...
Uncovering strong MgII absorbing galaxies: Imaging below the Lyman limit (2009)
Christensen, L., Noterdaeme, P., Petitjean, P., Ledoux, C., Fynbo, J. P. U.
The nature of the galaxies that give rise to absorption lines, such as damped Lyman-alpha systems (DLAs) or strong MgII lines, in quasar spectra is difficult to investigate in emission. Taking...
Noterdaeme, P., Petitjean, P., Ledoux, C., Srianand, R.
We present the results of a search for damped Lyman-alpha (DLA) systems in the Sloan Digital Sky Survey II (SDSS), Data Release 7. We use a fully automatic procedure to identify DLAs and derive their...
Ledoux, C., Vreeswijk, P. M., Smette, A., Fox, A. J., Petitjean, P., Ellison, S. L., ...
We aim to understand the nature of the absorbing neutral gas in the galaxies hosting high-redshift long-duration GRBs and to determine their physical conditions. We report the detection of a...
Noterdaeme, P., Ledoux, C., Srianand, R., Petitjean, P., Lopez, S.
We present the detection of carbon monoxide molecules (CO) at z=1.6408 towards the quasar SDSSJ160457.50+220300.5 using the VLT Ultraviolet and Visual Echelle Spectrograph. CO absorption is detected...
Gupta, N., Srianand, R., Petitjean, P., Noterdaeme, P., Saikia, D. J.
We present the results of a systematic Giant Metrewave Radio Telescope (GMRT) survey of 21-cm absorption in a representative and unbiased sample of 35 strong MgII systems in the redshift range:...
21-cm absorbers at intermediate redshifts (2009)
Gupta, N., Srianand, R., Petitjean, P., Noterdaeme, P., Saikia, D. J.
Damped Lyman-alpha systems (DLAs) seen in the spectra of high-z QSOs allow us to probe the physical conditions in protogalaxies. Our understanding of physical conditions in DLAs at high-z is...
E. Vanzella, S. Cristiani, S. Arnouts, M. Dennefeld, A. Fontana, A. Grazian, ...
Abstract. We report on low-resolution multi-object spectroscopy of 65 objects from I(AB) � 20 to I(AB) � 25 in the HDF-S obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS2)....
Obscured and powerful AGN and starburst activities at z~3.5 (2008)
Polletta, M., Omont, A., Berta, S., Bergeron, J., Stalin, C. S., Petitjean, P., ...
We report the discovery of two sources at z=3.867 and z=3.427 that exhibit powerful starburst and AGN activities. They benefit from data from radio to X rays from the CFHTLS-D1/SWIRE/XMDS surveys....
Noterdaeme, P., Petitjean, P., Ledoux, C., Srianand, R., Ivanchik, A.
We present the detection of deuterated molecular hydrogen (HD) in the remote Universe in a damped Lyman-alpha cloud at zabs=2.418 toward the quasar SDSS J143912.04+111740.5. This is a unique system...
Srianand, R., Gupta, N., Petitjean, P., Noterdaeme, P., Saikia, D. J.
We have discovered two dusty intervening MgII absorption systems at z~1.3 in the Sloan Digital Sky Survey (SDSS) database. The overall spectra of both QSOs are red (u-K>4.5 mag) and are well modelled...
First detection of CO in a high-redshift DLA (2008)
Srianand, R., Noterdaeme, P., Ledoux, C., Petitjean, P.
We present the first detection of carbon monoxide (CO) in a damped Lyman-alpha system (DLA) at z_abs =2.41837 toward SDSS J143912.04+111740.5. We also detected H_2 and HD molecules. The measured...
Recovering the topology of the IGM at z~2 (2008)
Caucci, S., Colombi, S., Pichon, C., Rollinde, E., Petitjean, P., Sousbie, T.
We investigate how well the 3D density field of neutral hydrogen in the Intergalactic Medium (IGM) can be reconstructed using the Lyman-alpha absorptions observed along lines of sight to quasars...
Molecular hydrogen in high-redshift Damped Lyman-alpha systems: The VLT/UVES database (2008)
Noterdaeme, P., Ledoux, C., Petitjean, P., Srianand, R.
We present the current status of ongoing searches for molecular hydrogen in high-redshift (1.8 < zabs = 20 and z_abs > 1.8, which have data that include redshifted H2 Lyman and/or Werner-band...
Obscured and powerful AGN and starburst activities at z ~ 3.5 (2008)
Polletta, M., Omont, A., Berta, S., Bergeron, J., Stalin, C. S., Petitjean, P., ...
Obscured and powerful AGN and starburst activities at z ~ 3.5 (2008)
Polletta, M., Omont, A., Berta, S., Bergeron, J., Stalin, C. S., Petitjean, P., ...
Aims. Short phases of coeval powerful starburst and AGN activity during the lifetimes of the most massive galaxies are predicted by various models of galaxy formation and evolution. In spite of their...
J.P. Mücket, R. Riediger, P. Petitjean
Introduction The study of the Lyff absorbers seen in quasar spectra is a very sensitive way to probe the baryonic material in the whole redshift range 0 ! z ! 5. In particular the evolution of the...
Reanalysis of the LLS in QSO HS 1700+6416 (2007)
. We take advantage of the unique information provided by the recent HST observations of three Lyman limit systems toward QSO HS 1700+6416 by Reimers et al. (1992) to constrain photoionization models...
The second detection of CO at redshift larger than 4 (2007)
Guilloteau Omont Mcmahon, S. Guilloteau, A. Omont, R. G. Mcmahon, P. Cox, P. Petitjean
. We report the detection of the 3mm J=5-4 CO line ( rest =576267.70 MHz) in the radio quiet quasar BRI 1335-0415 at redshift 4.41 with the IRAM interferometer. After BR 1202-0725 at z=4.69, this is...
Adaptive Optics Observation of QSOs Fields (2007)
Th'eodore Service, P. Petitjean, M. Bremer, C. Ledoux
We present preliminary results of AO imaging of quasars fields obtained with the CFHT adaptive optics system. The different issues that can be adressed by QSOs imaging are illustrated. 1 Introduction...
Noterdaeme, P., Ledoux, C., Petitjean, P., Petit, F. Le, Srianand, R., Smette, A.
We probe the physical conditions in high-redshift damped Ly-alpha systems using the observed molecular fraction and the rotational excitation of molecular hydrogen. We report two new detections of H2...
Evidence for overdensity around zem > 4 quasars from the proximity effect (2007)
Guimarães, R., Petitjean, P., Rollinde, E., De Carvalho, R. R., Djorgovski, S. G., Srianand, R., ...
We study the density field around zem > 4 quasars using high-quality medium spectral resolution Echelle Spectrograph and Imager–Keck spectra ( R∼ 4300 , signal-to-noise ratio (S/N) > 25) of 45...
Physical conditions in the neutral interstellar medium at z=2.43 toward Q2348-011 (2007)
Noterdaeme, P., Petitjean, P., Srianand, R., Ledoux, C., Petit, F. Le
We obtained a high-resolution VLT-UVES spectrum of the quasar Q2348-011 over a wavelength range that covers most of the prominent metal and molecular absorption lines from the log N(HI)=20.50+-0.10...
Vreeswijk, P. M., Ledoux, C., Smette, A., Ellison, S. L., Jaunsen, A. O., Andersen, M. I., ...
Publicación ISI
Vreeswijk, P. M., Ledoux, C., Smette, A., Ellison, S. L., Jaunsen, A. O., Andersen, M. I., ...
Publicación ISI
Detecting cold gas at intermediate redshifts: GMRT survey using Mg II systems (2006)
Gupta, Neeraj, Srianand, R., Petitjean, P., Khare, P., Saikia, D. J., York, D. G.
Intervening HI 21-cm absorption systems at z > 1.0 are very rare and only 4 confirmed detections have been reported in the literature. Despite their scarcity, they provide interesting and unique...
The ECLAIRs micro-satellite mission for gamma-ray burst multi-wavelength observations (2006)
Schanne, S., Barret, D., Basa, S., Boer, M., Casse, F., ...
Gamma-ray bursts (GRB), at least those with a duration longer than a few seconds are the most energetic events in the Universe and occur at cosmological distances. The ECLAIRs micro-satellite, to be...
Vreeswijk, P. M., Ledoux, C., Smette, A., Ellison, S. L., Jaunsen, A., Andersen, M. I., ...
We present high-resolution spectroscopic observations of GRB060418, obtained with VLT/UVES. These observations were triggered using the VLT Rapid-Response Mode (RRM), which allows for automated...
The ECLAIRs micro-satellite for multi-wavelength studies of gamma-ray burst prompt emission (2006)
Schanne, S., Barret, D., Basa, S., Boer, M., Cordier, B., ...
The cosmological revolution of 1997 has established that (at least long duration) gamma-ray bursts (GRB) are among the most energetic events in the Universe and occur at cosmological distances. The...
Ledoux, C., Petitjean, P., Fynbo, J. P. U., Moller, P., Srianand, R.
We used our database of VLT-UVES quasar spectra to build up a sample of 70 Damped Lyman-alpha (DLA) or strong sub-DLA systems with total neutral hydrogen column densities of log N(HI)>20 and...
Coppolani, F., Petitjean, P., Stoehr, F., Rollinde, E., Pichon, C., Colombi, S., ...
We present the transverse flux correlation function of the Lyman-alpha forest in quasar absorption spectra at z~2.1 from VLT-FORS and VLT-UVES observations of a total of 32 pairs of quasars; 26 pairs...
Molecular Hydrogen in a Damped Lyman-alpha System at z_abs=4.224 (2006)
Ledoux, C., Petitjean, P., Srianand, R.
We present the direct detection of molecular hydrogen at the highest redshift known today (z_abs=4.224) in a Damped Lyman-alpha (DLA) system toward the quasar PSS J1443+2724. This absorber is...
The most metal-poor damped Ly alpha system at z (2006)
Erni, P., Richter, P., Ledoux, C., Petitjean, P.
To constrain the conditions for very early nucleosynthesis in the Universe we compare the chemical enrichment pattern of an extremely metal-poor damped Lyman alpha (DLA) absorber with predictions...
Relative abundance pattern along the profile of high redshift Damped Lyman-alpha systems (2006)
Rodriguez, E., Petitjean, P., Aracil, B., Ledoux, C., Srianand, R.
We investigated abundance ratios along the profiles of six high-redshift Damped Lyman-alpha systems, three of them associated with H2 absorption, and derived optical depths in each velocity pixel....
The ECLAIRs micro-satellite mission for gamma-ray burst multi-wavelength observations (2006)
Schanne, S., Barret, D., Basa, S., Boer, M., Casse, F., ...
Gamma-ray bursts (GRB), at least those with a duration longer than a few seconds are the most energetic events in the Universe and occur at cosmological distances. The ECLAIRs micro-satellite, to be...
The ECLAIRs micro-satellite mission for gamma-ray burst multi-wavelength observations (2006)
Schanne, S., Barret, D., Basa, S., Boer, M., Casse, F., ...
Gamma-ray bursts (GRB), at least those with a duration longer than a few seconds are the most energetic events in the Universe and occur at cosmological distances. The ECLAIRs micro-satellite, to be...
The ECLAIRs micro-satellite mission for gamma-ray burst multi-wavelength observations (2006)
Schanne, S., Barret, D., Basa, S., Boer, M., Casse, F., ...
Gamma-ray bursts (GRB), at least those with a duration longer than a few seconds are the most energetic events in the Universe and occur at cosmological distances. The ECLAIRs micro-satellite, to be...
The correlation of the Lyman-alpha forest and metals in close pairs of hight-redshift quasars (2005)
Coppolani, F., Petitjean, P., Stoehr, F., Rollinde, E., Pichon, C., Colombi, S., ...
We derive the transverse flux correlation function in the Lyman-alpha forest at z~2.1 from VLT-FORS observations of a total of 32 pairs of quasars. The shape and correlation length of the transverse...
Barbuy, B., Spite, M., Spite, F., Hill, V., Cayrel, R., Plez, B., ...
We have carried out a new determination of abundances in the very metal-poor CH/CN strong stars CS 29497-34 and CS 22948-27, using high-resolution spectra obtained with the HARPS spectrograph at the...
HST STIS observations of four QSO pairs (2005)
Aracil, B., Petitjean, P., Smette, A., Surdej, J., Mucket, J. P., Cristiani, S.
We present HST STIS observations of four quasar pairs with redshifts 0.84
Ivanchik, A., Petitjean, P., Varshalovich, D., Aracil, B., Srianand, R., Chand, H., ...
A new limit on the possible cosmological variation of the proton-to-electron mass ratio \mu=m_p/m_e is estimated by measuring wavelengths of H_2 lines of Lyman and Werner bands from two absorption...
A VLT/FORS2 spectroscopic survey in the HDF-S (2005)
Vanzella, E., Cristiani, S., Arnouts, S., Dennefeld, M., Fontana, A., Grazian, A., ...
We report on low-resolution multi-object spectroscopy of 65 objects from I(AB) ~= 20 to I(AB) ~= 25 in the HDF-S obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS2). 18 objects...
Starburst activity in the host galaxy of the z=2.58 quasar J1409+5628 (2005)
Beelen, A., Cox, P., Pety, J., Carilli, C. L., Bertoldi, F., Momjian, E., ...
We report the detection of CO emission from the optically luminous, radio-quiet quasar J140955.5+562827, at a redshift z_CO =2.583. We also present VLA continuum mapping results and VLBA high spatial...
A kinematical analysis of NGC 2992 (2005)
Marquez, I., Boisson, C., Durret, F., Petitjean, P.
We present long slit spectroscopy for the [OIII] and H$\\alpha$ wavelength ranges along nine different position angles for the Sa Seyfert 1.9 galaxy NGC 2992. Double profiles are present in several...
Near infrared observations of quasars with extended ionized envelopes (2005)
Marquez, I., Durret, F., Petitjean, P.
We have observed a sample of 15 and 8 quasars with redshifts between 0.11 and 0.87 (mean value 0.38) in the J and K\' bands respectively. Eleven of the quasars were previously known to be associated...
Integral field spectroscopy of the radio galaxy 3C 171 (2005)
Marquez, I., Pecontal, E., Durret, F., Petitjean, P.
We have performed integral field spectroscopy of the radio galaxy 3C 171 (redshift z=0.238) with the TIGER instrument at the Canada France Hawaii telescope in the Hbeta-[OIII]4959-5007 wavelength...
The sub-DLA toward HE0001-2340: galaxy formation at z=2 (2005)
Richter, P., Ledoux, C., Petitjean, P., Bergeron, J.
We present a detailed analysis of chemical abundances in a sub-damped Ly alpha absorber (sub-DLA) at z=2.187 towards the quasar HE0001-2340 (z_em=2.28) using VLT/UVES data. This sub-DLA system...
The mass-metallicity relation for high-redshift damped Ly-alpha galaxies (2005)
Ledoux, C., Petitjean, P., Moller, P., Fynbo, J., Srianand, R.
We used our database of ESO VLT-UVES spectra of quasars to build up a sample of 67 Damped Lyman-alpha (DLA) systems with redshifts 1.7
The density structure around quasars from optical depth statistics (2005)
Rollinde, E., Srianand, R., Theuns, T., Petitjean, P., Chand, H.
We present a method for studying the proximity effect and the density structure around redshift z=2-3 quasars. It is based on the probability distribution of Lyman-alpha pixel optical depths and its...
Oxygen isotopic exchange: A useful tool for characterizing oxygen conducting oxides (2005)
Bassat, Jean-Marc, Petitjean, P., Fouletier, J., Lalanne, Cécile, Caboche, C., Mauvy, Fabrice, ...
The 18O/16O isotope exchange depth profile technique (IEDP) followed by SIMS characterizations was applied to dense membranes of pure ionic conductors and mixed ionic/electronic conducting materials....
The ECLAIRs micro-satellite for multi-wavelength studies of gamma-ray burst prompt emission (2005)
Schanne, S., Barret, D., Basa, S., Boer, M., Cordier, B., ...
The cosmological revolution of 1997 has established that (at least long duration) gamma-ray bursts (GRB) are among the most energetic events in the Universe and occur at cosmological distances. The...
The ECLAIRs micro-satellite for multi-wavelength studies of gamma-ray burst prompt emission (2005)
Schanne, S., Barret, D., Basa, S., Boer, M., Cordier, B., ...
The cosmological revolution of 1997 has established that (at least long duration) gamma-ray bursts (GRB) are among the most energetic events in the Universe and occur at cosmological distances. The...
Oxygen isotopic exchange: A useful tool for characterizing oxygen conducting oxides (2005)
Bassat, Jean-Marc, Petitjean, P., Fouletier, J., Lalanne, Cécile, Caboche, C., Mauvy, Fabrice, ...
The 18O/16O isotope exchange depth profile technique (IEDP) followed by SIMS characterizations was applied to dense membranes of pure ionic conductors and mixed ionic/electronic conducting materials....
Oxygen isotopic exchange: A useful tool for characterizing oxygen conducting oxides (2005)
Bassat, Jean-Marc, Petitjean, P., Fouletier, Jacques, Lalanne, Cécile, Caboche, C., Mauvy, Fabrice, ...
The 18O/16O isotope exchange depth profile technique (IEDP) followed by SIMS characterizations was applied to dense membranes of pure ionic conductors and mixed ionic/electronic conducting materials....
Oxygen isotopic exchange: A useful tool for characterizing oxygen conducting oxides (2005)
Bassat, Jean-Marc, Petitjean, P., Fouletier, Jacques, Lalanne, Cécile, Caboche, C., Mauvy, Fabrice, ...
The 18O/16O isotope exchange depth profile technique (IEDP) followed by SIMS characterizations was applied to dense membranes of pure ionic conductors and mixed ionic/electronic conducting materials....
The ECLAIRs micro-satellite for multi-wavelength studies of gamma-ray burst prompt emission (2004)
Schanne, S., Barret, D., Basa, S., Boer, M., Cordier, B., ...
The cosmological revolution of 1997 has established that (at least long duration) gamma-ray bursts (GRB) are among the most energetic events in the Universe and occur at cosmological distances. The...
Barbuy, B., Spite, M., Spite, F., Hill, V., Cayrel, R., Plez, B., ...
We have carried out a new determination of abundances in the very metal-poor CH/CN strong stars CS 29497-34 and CS 22948-27, using high-resolution spectra obtained with the HARPS spectrograph at the...
Starburst activity in the host galaxy of the z=2.58 quasar J1409+5628 (2004)
Beelen, A., Cox, P., Pety, J., Carilli, C. L., Bertoldi, F., Momjian, E., ...
We report the detection of CO emission from the optically luminous, radio-quiet quasar J140955.5+562827, at a redshift z_CO =2.583. We also present VLA continuum mapping results and VLBA high spatial...
Chand, H., Srianand, R., Petitjean, P., Aracil, B.
Development of fundamental physics relies on the constancy of various fundamental quantities such as the fine structure constant. Detecting or constraining the possible time variations of these...
Barbuy, B., Spite, M., Spite, F., Hill, V., Cayrel, R., Plez, B., ...
We have carried out a new determination of abundances in the very metal-poor CH/CN strong stars CS 29497-34 and CS 22948-27, using high-resolution spectra obtained with the HARPS spectrograph at the...
Starburst activity in the host galaxy of the z=2.58 quasar J1409+5628 (2004)
Beelen, A., Cox, P., Pety, J., Carilli, C. L., Bertoldi, F., Momjian, E., ...
We report the detection of CO emission from the optically luminous, radio-quiet quasar J140955.5+562827, at a redshift z_CO =2.583. We also present VLA continuum mapping results and VLBA high spatial...
Barbuy, B., Spite, M., Spite, F., Hill, V., Cayrel, R., Plez, B., ...
We have carried out a new determination of abundances in the very metal-poor CH/CN strong stars CS 29497-34 and CS 22948-27, using high-resolution spectra obtained with the HARPS spectrograph at the...
Starburst activity in the host galaxy of the z=2.58 quasar J1409+5628 (2004)
Beelen, A., Cox, P., Pety, J., Carilli, C. L., Bertoldi, F., Momjian, E., ...
We report the detection of CO emission from the optically luminous, radio-quiet quasar J140955.5+562827, at a redshift z_CO =2.583. We also present VLA continuum mapping results and VLBA high spatial...
Starburst activity in the host galaxy of the z=2.58 quasar J1409+5628 (2004)
Beelen, A., Cox, P., Pety, J., Carilli, C. L., Bertoldi, E., Momjian, E., ...
The VLT-UVES survey for molecular hydrogen in high-redshift damped Lyman-alpha systems (2003)
Ledoux, C., Petitjean, P., Srianand, R.
We have searched for molecular hydrogen in damped Lyman-alpha (DLA) and sub-DLA systems at z>1.8 using UVES at the VLT. Out of the 33 systems in our sample, 8 have firm and 2 have tentative...
Rollinde, E., Petitjean, P., Pichon, C., Colombi, S., Aracil, B., D'Odorico, V., ...
We study the clustering of matter in the intergalactic medium from the Lyman-alpha forests seen in the spectra of pairs or groups of z ~ 2 quasars observed with FORS2 and UVES at the VLT-UT2 Kueyen...
Does the proton-to-electron mass ratio vary in the course of cosmological evolution? (2002)
Ivanchik, A., Petitjean, P., Rodriguez, E., Varshalovich, D.
The possible cosmological variation of the proton-to-electron mass ratio was estimated by measuring the H_2 wavelengths in the high-resolution spectrum of the quasar Q~0347-382. Our analysis yielded...
A VLT/FORS2 spectroscopic survey in the HDF-S (2002)
Vanzella, E., Cristiani, S., Arnouts, S., Dennefeld, M., Fontana, A., Grazian, A., ...
We report on low-resolution multi-object spectroscopy of 65 objects from I(AB) ~= 20 to I(AB) ~= 25 in the HDF-S obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS2). 18 objects...
HST STIS observations of four QSO pairs (2002)
Aracil, B, Petitjean, P, Smette, A, Surdej, Jean, Mucket, JP, Cristiani, S
We present HST STIS observations of four quasar pairs with redshifts 0.84
Ledoux, C., Srianand, R., Petitjean, P.
We report the detection of H_2, CI, CI*, CI** and Cl I lines in a near Solar-metallicity ([Zn/H]=-0.13) damped Lyman-alpha (DLA) system at z_abs=1.962 observed on the line of sight to the quasar Q...
A collimated flow driven by radiative pressure from the nucleus of quasar Q~1511+091 (2002)
Srianand, R., Petitjean, P., Ledoux, C., Hazard, C.
High velocity outflows from quasars are revealed by the absorption signatures they produce in the spectrum of the quasar. Clues on the nature and origin of these flows are important for our...
HST STIS observations of four QSO pairs (2002)
Aracil, B., Petitjean, P., Smette, A., Surdej, J., Mucket, J. P., Cristiani, S.
We present HST STIS observations of four quasar pairs with redshifts 0.84
Adaptive Optics imaging of Quasar Hosts (2002)
We present the results of adaptive-optics imaging of 12 (z < 0.6) quasars in the H and K bands using the PUEO system mounted on the Canada-France-Hawaii telescope. The QSOs (m_V > 15.0) themselves...
Ledoux, C., Bergeron, J., Petitjean, P.
We analyse a sample of 24 damped Lyman-alpha (DLA)/moderate DLA systems at 0.3
HST STIS observations of four QSO pairs (2002)
Aracil, B., Petitjean, P., Smette, A., Surdej, J., Mucket, J. P., Cristiani, S.
We present HST STIS observations of four quasar pairs with redshifts 0.84
A VLT/FORS2 spectroscopic survey in the HDF-S (2002)
Vanzella, E., Cristiani, S., Arnouts, S., Dennefeld, M., Fontana, A., Grazian, A., ...
We report on low-resolution multi-object spectroscopy of 65 objects from I(AB) ~= 20 to I(AB) ~= 25 in the HDF-S obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS2). 18 objects...
HST STIS observations of four QSO pairs (2002)
Aracil, B., Petitjean, P., Smette, A., Surdej, J., Mucket, J. P., Cristiani, S.
We present HST STIS observations of four quasar pairs with redshifts 0.84
A VLT/FORS2 spectroscopic survey in the HDF-S (2002)
Vanzella, E., Cristiani, S., Arnouts, S., Dennefeld, M., Fontana, A., Grazian, A., ...
We report on low-resolution multi-object spectroscopy of 65 objects from I(AB) ~= 20 to I(AB) ~= 25 in the HDF-S obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS2). 18 objects...
Do the Fundamental Constants Vary in the Course of the Cosmological Evolution? (2001)
Ivanchik, A., Rodriguez, E., Petitjean, P., Varshalovich, D.
We estimate the cosmological variation of the proton-to-electron mass ratio \mu=m_p/m_e by measuring the wavelengths of molecular hydrogen transitions in the early universe. The analysis is performed...
H_2 molecules in damped systems (2001)
Srianand, R., Petitjean, P., Ledoux, C.
Damped Lyman alpha systems seen in the spectra of high-z QSOs arise in high-density neutral gas in which molecular hydrogen (H_2) should be conspicuous. Systematic searches to detect the H_2 lines...
HD Molecular Lines in an Absorption System at Redshift z = 2.3377 (2001)
Varshalovich, D., Ivanchik, A., Petitjean, P., Srianand, R., Ledoux, C.
We have analyzed the spectrum of the quasar PKS 1232+082 obtained by Petitjean et al. (2000). HD molecular lines are identified in an absorption system at the redshift z=2.3377. The column density of...
Rollinde, E., Petitjean, P., Pichon, C.
We study the physical properties of the Lyman-alpha forest by applying the inversion method described by Pichon et al. (2001) to the high resolution and high S/N ratio spectrum of the z_em=2.40...
Inversion of the Lyman-$\alpha$ forest: 3D investigation of the intergalactic medium (2001)
Pichon, C., Vergely, J. L., Rollinde, E., Colombi, S., Petitjean, P.
We discuss the implementation of Bayesian inversion methods in order to recover the properties of the intergalactic medium from observations of the neutral hydrogen Lyman-$\alpha$ absorptions...
A near-solar metallicity damped Lyman-alpha system toward the BAL quasar Tol 1037-2703 (2001)
We report the detection of a Broad Absorption Line (BAL) outflow in the spectrum of Tol 1037-2703 with three main BALs at 36000, 25300 and 22300~\kms outflow velocities. Although the overall flow is...
Adaptive optics imaging of low and intermediate redshift quasars (2001)
Marquez, I., Petitjean, P., Theodore, B., Bremer, M., Monnet, G.
We present the results of adaptive-optics imaging in the H and K bands of 12 low and intermediate redshift (z15.0) themselves as reference for the correction, have typical spatial resolution of...
Extent of Lyman-alpha complexes from HST observations of four pairs of quasars (2001)
Aracil, B, Petitjean, P, Smette, A, Surdej, Jean, Mücket, J
The 17th IAP Colloquium "Gaseous matter in galaxies and intergalactic space. Observational and theoretical results, with special emphasis on new data from FUSE, HST and VLT'
Integral field spectroscopy of the radio galaxy 3C 171 (2000)
Marquez, I., Pecontal, E., Durret, F., Petitjean, P.
We have performed integral field spectroscopy of the radio galaxy 3C 171 (redshift z=0.238) with the TIGER instrument at the Canada France Hawaii telescope in the Hbeta-[OIII]4959-5007 wavelength...
Results of a careful analysis of the absorption systems with zabs = zem seen toward the bright, z_em ~ 3.91, gravitationally lensed quasar APM 08279+5255 are presented. Two of the narrow-line...
Integral field spectroscopy of the radio galaxy 3C 171 (2000)
Marquez, I., Pecontal, E., Durret, F., Petitjean, P.
We have performed integral field spectroscopy of the radio galaxy 3C 171 (redshift z=0.238) with the TIGER instrument at the Canada France Hawaii telescope in the Hbeta-[OIII]4959-5007 wavelength...
Integral field spectroscopy of the radio galaxy 3C 171 (2000)
Marquez, I., Pecontal, E., Durret, F., Petitjean, P.
We have performed integral field spectroscopy of the radio galaxy 3C 171 (redshift z=0.238) with the TIGER instrument at the Canada France Hawaii telescope in the Hbeta-[OIII]4959-5007 wavelength...
Abysmal prognosis of patients with type 2 diabetes entering dialysis (1999)
Chantrel, F, Enache, I, Bouiller, M, Kolb, I, Kunz, K, Petitjean, P, ...
Identification of absorbing galaxies towards the QSO J2233-606 in the Hubble Deep Field South (1998)
Tresse, L., Dennefeld, M., Petitjean, P., Cristiani, S., White, S.
We present spectroscopic observations of galaxies lying within 1' from the QSO J2233-606 in the HDF-S. Several are found to be coincident in redshift with absorption line systems seen in the HST...
Near infrared observations of quasars with extended ionized envelopes (1998)
Marquez, I., Durret, F., Petitjean, P.
We have observed a sample of 15 and 8 quasars with redshifts between 0.11 and 0.87 (mean value 0.38) in the J and K' bands respectively. Eleven of the quasars were previously known to be associated...
On the kinematics of damped Lyman-alpha systems (1998)
Ledoux, C., Petitjean, P., Bergeron, J., Wampler, E. J., Srianand, R.
We report on high spectral resolution observations of five damped Ly-alpha absorbers. Line velocity profiles and heavy element abundances are discussed. Nitrogen is found to have abundances less than...
Molecules in the $z_{\rm abs}$~=~2.8112 damped system toward PKS~0528--250 (1998)
We present a detailed analysis of a high resolution spectrum of the damped Ly$\alpha$ system at $z_{\rm abs}$~=~2.8112toward PKS~0528-250. The absorption redshift is slightly larger than the emission...
A kinematical analysis of NGC 2992 (1998)
Marquez, I., Boisson, C., Durret, F., Petitjean, P.
We present long slit spectroscopy for the [OIII] and H$\alpha$ wavelength ranges along nine different position angles for the Sa Seyfert 1.9 galaxy NGC 2992. Double profiles are present in several...
Star-formation at z=4.7 in the environment of the QSO BR1202-07 (1998)
Fontana, A., D'Odorico, S., Giallongo, E., Cristiani, S., Monnet, G., Petitjean, P.
We present here the spectrum of the galaxy companion to the z=4.7 quasar BR1202-0725, in the optical range 6000-9000 A, corresponding to 1050-1580 A rest-frame. We detect a strong Lya emission line...
A kinematical analysis of NGC 2992 (1998)
Marquez, I., Boisson, C., Durret, F., Petitjean, P.
We present long slit spectroscopy for the [OIII] and H$\\alpha$ wavelength ranges along nine different position angles for the Sa Seyfert 1.9 galaxy NGC 2992. Double profiles are present in several...
Near infrared observations of quasars with extended ionized envelopes (1998)
Marquez, I., Durret, F., Petitjean, P.
We have observed a sample of 15 and 8 quasars with redshifts between 0.11 and 0.87 (mean value 0.38) in the J and K\' bands respectively. Eleven of the quasars were previously known to be associated...
A kinematical analysis of NGC 2992 (1998)
Marquez, I., Boisson, C., Durret, F., Petitjean, P.
We present long slit spectroscopy for the [OIII] and H$\\alpha$ wavelength ranges along nine different position angles for the Sa Seyfert 1.9 galaxy NGC 2992. Double profiles are present in several...
Near infrared observations of quasars with extended ionized envelopes (1998)
Marquez, I., Durret, F., Petitjean, P.
We have observed a sample of 15 and 8 quasars with redshifts between 0.11 and 0.87 (mean value 0.38) in the J and K\' bands respectively. Eleven of the quasars were previously known to be associated...
Spatial distribution of the Ly-alpha forest (1998)
Petitjean, P, Surdej, Jean, Remy, M, Smette, A, Mucket, J, Shaver, P
The Young Universe: Galaxy Formation and Evolution at Intermediate and High Redshift ASP Conference Series; Vol. 146
A companion to a quasar at redshift 4.7 (1996)
Petitjean, P., Pecontal, E., Valls-Gabaud, D., Charlot, S.
There is a growing consensus that the emergence of quasars at high redshifts is related to the onset of galaxy formation, suggesting that the detection of concentrations of gas accompanying such...
A new start for the VLTI (1996)
Paresce, F., Mourard, F., Bedding, T., Beletic, J., Leinert, C., Haniff, C., ...
Dilepton and trilepton production by neutrinos in Gargamelle at CERN SPS energies (1990)
Haatuft, A, Myklebost, K, Olsen, J M, Willutzky, M, Petitjean, P
Properties of the $\overline{p}$p annihilations into strange particles at 702 and 757 MeV/c (1990)
Ganguli, S N, Gurtu, A, Malhotra, P K, Raghavan, R, Subramanian, A, Cerrada-Canales, M, ...
Antibacterial activities of erythromycins A, B, C, and D and some of their derivatives (1985)
Dubost, M, ...
The MICs of erythromycins A, B, C, and D and some of their derivatives were determined against 21 gram-positive and 15 gram-negative microorganisms. Antibacterial activity was confined to...
Dilepton and trilepton production by neutrinos in Gargamelle at CERN SPS energies (1983)
Haatuft, A., Myklebost, K., Olsen, J.M., Willutzky, M., Petitjean, P.
Dilepton and trilepton production by neutrinos in Gargamelle at CERN SPS energies (1983)
Haatuft, A., Myklebost, K., Olsen, J.M., Willutzky, M., Petitjean, P.
Antibacterial activities of erythromycins A, B, C, and D and some of their derivatives.
Kibwage, I O, Hoogmartens, J, Roets, E, Vanderhaeghe, H, Verbist, L, Dubost, M, ...
The MICs of erythromycins A, B, C, and D and some of their derivatives were determined against 21 gram-positive and 15 gram-negative microorganisms. Antibacterial activity was confined to...
Antibacterial activities of erythromycins A, B, C, and D and some of their derivatives.
Kibwage, I O, Hoogmartens, J, Roets, E, Vanderhaeghe, H, Verbist, L, Dubost, M, ...
The MICs of erythromycins A, B, C, and D and some of their derivatives were determined against 21 gram-positive and 15 gram-negative microorganisms. Antibacterial activity was confined to...
QSO Absorption Lines As Chronicle Of The Structure Formation History
J.P. Mücket, R. Riediger, P. Petitjean, Mucket Et, Hernquist Et Al
onding quantities from observations quantitatively it could be expected that further investigations could lead to new constraints with respect to the underlying cosmological models. Since...