On the detectability of HI 21-cm in MgII absorption system (2009)
We investigate the effect of two important, but oft neglected, factors which can affect the detectability of HI 21-cm absorption in MgII absorption systems: The effect of line-of-sight geometry of...
New searches for HI 21-cm in damped Lyman-alpha absorption systems (2009)
Curran, S. J., Tzanavaris, P., Darling, J. K., Whiting, M. T., Athreya, R., ...
We present the results of three separate searches for HI 21-cm absorption in a total of twelve damped Lyman-alpha absorption systems (DLAs) and sub-DLAs over the redshift range z = 0.86-3.37. We find...
Blind Wide Area Surveys: Where will we find redshifted atomic and molecular absorption? (2009)
Curran, S. J., Whiting, M. T., Webb, J. K.
Spectroscopy of redshifted radio absorption of atomic and molecular species provide excellent probes of the cold component of the gas in the early Universe which can be used to address many important...
Double and single recycled pulsars: an evolutionary puzzle? (2009)
Belczynski, K., Lorimer, D. R., Ridley, J. P., Curran, S. J.
We investigate the statistics of isolated recycled pulsars and double neutron star binaries in the Galactic disk. Since recycled pulsars are believed to form through accretion and spinup in close...
HI 21-cm absorption and unified schemes of active galactic nuclei (2009)
HI 21-cm absorption has never been detected in z > 0.1 AGN in which the ultra-violet luminosity exceeds logL ~ 23 W/Hz. We explore the implications that this has for the consensus that it is the...
Where is the Cold Neutral Gas in the Hosts of High Redshift AGN? (2008)
Curran, S. J., Whiting, M. T., Webb, J. K.
Previous surveys for HI 21-cm absorption in z > 0.1 radio galaxies and quasars yield a 40% detection rate, which is attributed to unified schemes of active galactic nuclei (AGN). In this paradigm...
The Large-Scale Atomic and Molecular Gas in the Circinus Galaxy (2008)
Curran, S. J., Koribalski, B. S., Bains, I.
We have used the ATCA and the SEST to map the large-scale atomic and molecular gas in the nearby Circinus galaxy. The HI mosaic of Circinus exhibits the warps in position angle and inclination...
Ionised carbon and galaxy activity (2008)
We investigate the possibility that the decrease in the relative luminosity of the 158 micron [CII] line with the far-infrared luminosity in extragalactic sources stems from a stronger contribution...
A Survey for Redshifted Molecular and Atomic Absorption Lines II (2008)
Curran, S. J., Whiting, M. T., Wiklind, T., Webb, J. K., Murphy, M. T., Purcell, C. R.
We present the results of a z>2.9 survey for HI 21-cm and molecular absorption in the hosts of radio quasars using the GMRT and the Tidbinbilla 70-m telescope. Previously published searches, which...
Christiansen, J. L., Derekas, A., Kiss, L. L., Ashley, M. C. B., Curran, S. J., Hamacher, D. W., ...
We present a new catalogue of variable stars compiled from data taken for the University of New South Wales Extrasolar Planet Search. From 2004 October to 2007 May, 25 target fields were each...
S. J. Curran, P. Bergman, A. Heikkila, S. Aalto
Molecular gas conditions in NGC 4945 and the Circinus galaxy
Centaurus A: Molecular gas shells or large-scale outflow?
S. J. Curran, A. G. Polatidis, S. Aalto, R. S. Booth
Global molecular gas properties of Seyfert galaxies I. The observational data
S. J. Curran, G. Rydbeck, R. S. Booth
Abstract. The Circinus galaxy, a type 2 Seyfert, is suspected to have a molecular gas ring structure with a diameter of
S. J. Curran, J. K. Webb, R. Bandiera, E. Corbelli, M. T. Murphy, V. V. Flambaum
We present a catalogue of the 316 damped Lyman alpha absorbers taken from the literature. All damped Lyman alpha absorbers are included, with no selection on redshift or quasar magnitude. Of these,...
ASTRONOMY AND ASTROPHYSICS (2007)
S. J. Curran, G. Rydbeck, R. S. Booth
Abstract. From previous work on the Circinus galaxy we postulated that 50 % of the molecular gas in this type 2 Seyfert nucleus is distributed in a sub-kiloparsec circumnuclear ring, probably...
Dense molecular gas in Seyfert galaxies (2007)
S. J. Curran, S. Aalto, R. S. Booth, Co J
Abstract. We have used the 20 m Onsala and 15 m SEST
S. J. Curran, A. G. Polatidis, S. Aalto, R. S. Booth
Global molecular gas properties of Seyfert galaxies II. Analysis of the results
Curran, S. J., Tzanavaris, P., Pihlstroem, Y. M., Webb, J. K.
We present the results of a survey for 21-cm absorption in four never previously searched damped Lyman-alpha absorption systems (DLAs) with the Westerbork Synthesis Radio Telescope. We add our...
HI and OH absorption in the lensing galaxy of MG J0414+0534 (2007)
Curran, S. J., Darling, J., Bolatto, A. D., Whiting, M. T., Bignell, C., Webb, J. K.
We report the detection of \HI 21-cm absorption in the $z=0.96$ early-type lensing galaxy towards MG J0414+0534 with the Green Bank Telescope. The absorption, with total $N_{\rm HI}=1.6 \times...
Detection of broad 21-cm absorption at z = 0.656 in the complex sight-line towards 3C336 (2007)
Curran, S. J., Tzanavaris, P., Murphy, M. T., Webb, J. K., Pihlstroem, Y. M.
We report the detection of 21-cm absorption at z = 0.656 towards 1622+238 (3C336). The line is very broad with a Full-Width Half Maximum (FWHM) of 235 km/s, giving a velocity integrated optical depth...
A Search for Propylene Oxide and Glycine in Sagittarius B2 (LMH) and Orion (2007)
Cunningham, M. R., Jones, P. A., Godfrey, P. D., Cragg, D. M., Bains, I., Burton, M. G., ...
We have used the Mopra Telescope to search for glycine and the simple chiral molecule propylene oxide in the Sgr B2 (LMH) and Orion KL, in the 3-mm band. We have not detected either species, but have...
Murphy, M. T., Curran, S. J., Webb, J. K., Menager, H., Zych, B. J.
A correlation between the metallicity, [M/H], and rest-frame MgII equivalent width, EW, is found from 49 DLAs and strong sub-DLAs drawn from the literature over the redshift range 0.23 sigma...
A search for propylene oxide and glycine in Sagittarius B2 (LMH) and Orion (2007)
Cunningham, M. R., Jones, P. A., Godfrey, P. D., Cragg, D. M., Bains, I., Burton, M. G., ...
A search for propylene oxide and glycine in Sagittarius B2 (LMH) and Orion (2007)
Cunningham, M. R., Jones, P. A., Godfrey, P. D., Cragg, D. M., Bains, I., Burton, M. G., ...
Tzanavaris, P., Murphy, M. T., Webb, J. K., Flambaum, V. V., Curran, S. J.
Nine quasar absorption spectra at 21-cm and UV rest-wavelengths are used to estimate possible variations in x=alpha^2 g_p mu, (alpha is the fine structure constant, g_p the proton g-factor and...
A survey for redshifted molecular and atomic absorption lines I (2006)
Curran, S. J., Whiting, M. T., Murphy, M. T., Webb, J. K., Longmore, S. N., Pihlstroem, Y. M., ...
We are currently undertaking a large survey for redshifted atomic and molecular absorption ... only one clear and one tentative detection were obtained: HI absorption at z = 0.097 in PKS 1555-140 and...
The detectability of HI 21-cm absorption in damped Lyman-alpha systems (2006)
In this paper we investigate the possible reasons why HI 21-cm absorption in damped Lyman-alpha systems (DLAs) has only been detected at low redshift... We suggest that the lack of 21-cm absorption...
A CH3CN and HCO+ survey towards southern methanols masers associated with star formation (2006)
Purcell, C. R., Balasubramanyam, R., Burton, M. G., Walsh, A. J., Minier, V., Hunt-Cunningham, M. R., ...
A CH3CN and HCO+ survey towards southern methanols masers associated with star formation (2006)
Purcell, C. R., Balasubramanyam, R., Burton, M. G., Walsh, A. J., Minier, V., Hunt-Cunningham, M. R., ...
A CH3CN and HCO+ survey towards southern methanol masers associated with star formation (2005)
Purcell, C. R., Balasubramanyam, R., Burton, M. G., Walsh, A. J., Minier, V., Hunt-Cunningham, M. 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=5-4 and 6-5 rotational transitions...
Rotating wall vessel bioreactors have been proposed as a means of controlling the fluid dynamic environment during long-term culture of mammalian cells and engineered tissues. In this study, we show...
Rotating wall vessel bioreactors have been proposed as a means of controlling the fluid dynamic environment during long-term culture of mammalian cells and engineered tissues. In this study, we show...
Rotating wall vessel bioreactors have been proposed as a means of controlling the fluid dynamic environment during long-term culture of mammalian cells and engineered tissues. In this study, we show...
Chemical modification of polyurethane membranes with RGD-containing motifs (2005)
Curran, S.J., Oates, M., Hunt, J.A., Black, R.A.
Paper examining chemical modification of polyurethane membranes with RGD-containing motifs.
Tzanavaris, P., Webb, J. K., Murphy, M. T., Flambaum, V. V., Curran, S. J.
Quasar absorption spectra at 21-cm and UV rest-wavelengths are used to estimate the time variation of x=alpha^2 g_p mu, where alpha is the fine structure constant, g_p the proton g factor, and...
Spin temperatures and covering factors for HI 21-cm absorption in damped Lyman-alpha systems (2004)
Curran, S. J., Murphy, M. T., Pihlstroem, Y. M., Webb, J. K., Purcell, C. R.
We investigate the practice of assigning high spin temperatures to damped Lyman-alpha absorption systems (DLAs) not detected in HI 21-cm absorption. In particular, Kanekar & Chengaulr (2003) have...
Measuring Changes in the Fundamental Constants with Redshifted Radio Absorption Lines (2004)
Curran, S. J., Kanekar, N., Darling, J. K.
Strong evidence has recently emerged for a variation in the fine structure constant, $\alpha\equiv e^2/\hbar c$, over the history of the Universe. This was concluded from a detailed study of the...
Molecular fraction limits in damped Lyman-alpha absorption systems (2004)
Curran, S. J., Murphy, M. T., Pihlstroem, Y. M., Webb, J. K., Bolatto, A. D., Bower, G. 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...
Annular-flow bioreactors are normally operated under laminar Couette flow conditions in order to minimise shear-induced damage to cells. In this study, we computed the fluid shear stresses in model...
Annular-flow bioreactors are normally operated under laminar Couette flow conditions in order to minimise shear-induced damage to cells. In this study, we computed the fluid shear stresses in model...
Annular-flow bioreactors are normally operated under laminar Couette flow conditions in order to minimise shear-induced damage to cells. In this study, we computed the fluid shear stresses in model...
Atomic and Molecular Absorption at High Redshift (2003)
Curran, S. J., Webb, J. K., Murphy, M. T., Pihlström, Y. 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...
Deep Searches for High Redshift Molecular Absorption (2003)
Curran, S. J., Webb, J. K., Murphy, M. 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...
H_2-bearing damped Lyman-alpha systems as tracers of cosmological chemical evolution (2003)
Murphy, M. T., Curran, S. 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...
Murphy, M. T., Curran, S. J., Webb, J. K.
We describe initial results of a search for redshifted molecular absorption toward four millimetre-loud, optically faint quasars. A wide frequency bandwidth of up to 23 GHz per quasar was scanned...
Curran, S.J., Rice, J.M., Chen, R., Donegan, G., Williams, D.F., Hunt, J.A., ...
Paper presented at the Second Meeting of the European Tissue Engineering Society focusing on cell-seeding and proliferation on the lumina of PLLA tubules in a Dynamic Couette-Taylor Bioreactor.
Curran, S.J., Rice, J.M., Chen, R., Donegan, G., Williams, D.F., Hunt, J.A., ...
Paper presented at the Second Meeting of the European Tissue Engineering Society focusing on cell-seeding and proliferation on the lumina of PLLA tubules in a Dynamic Couette-Taylor Bioreactor.
Curran, S.J., Rice, J.M., Chen, R., Donegan, G., Williams, D.F., Hunt, J.A., ...
Paper presented at the Second Meeting of the European Tissue Engineering Society focusing on cell-seeding and proliferation on the lumina of PLLA tubules in a Dynamic Couette-Taylor Bioreactor.
A 22GHz search for molecular absorption at z~3 with the upgraded ATCA (2002)
Curran, S. J., Murphy, M. T., Webb, J. K., Pihlstroem, Y. M.
We report a lambda > 1cm 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, M. T., Flambaum, V. V., Curran, S. J.
We report preliminary 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,...
Does the fine structure constant vary? A detailed investigation into systematic effects (2002)
Murphy, M. T., Webb, J. K., Flambaum, V. V., Curran, S. J.
We have previously presented 5.7-sigma evidence for a smaller alpha at redshifts 0.2 < z_abs < 3.7 from a sample of 128 Keck/HIRES quasar absorption systems: da/a = (-0.57 +/- 0.10) x 10^{-5}. A...
Time evolution of the fine structure constant (2002)
Murphy, M. T., Webb, J. K., Flambaum, V. V., Curran, S. J.
We present a short review of the current quasar (QSO) absorption line constraints on possible variation of the fine structure constant, alpha = e^2/(hbar*c). Particular attention is paid to recent...
A search for molecules in damped Lyman-alpha absorbers occulting millimetre-loud quasars (2002)
Curran, S. J., Murphy, M. T., Webb, J. K., Rantakyro, F., Johansson, L. E. B., Nikolic, S.
We have used the SEST 15-metre and Onsala 20-metre telescopes to perform deep (r.m.s. >~ 30 mJy) integrations of various molecular rotational transitions towards damped Lyman-alpha absorption systems...
Curran, S. J., Webb, J. K., Murphy, M. T., Bandiera, R., Corbelli, E., Flambaum, V. V.
We present a catalogue of the 322 damped Lyman alpha absorbers taken from the literature. All damped Lyman alpha absorbers are included, with no selection on redshift or quasar magnitude. Of these,...
Shear stress effects on freely suspended cells in an annular flow bioreactor (2002)
Paper examining the shear stress effects on freely suspended cells in an annular flow bioreactor.
CN and HNC Line Emission in IR Luminous Galaxies (2001)
Aalto, S., Polatidis, A. G., Huttemeister, S., Curran, S. J.
We have observed HNC 1-0, CN 1-0 and 2-1 line emission in a sample of 13 IR luminous (LIRGs, L_IR > 10E11 Lo) starburst and Seyfert galaxies. HNC 1-0 is detected in 9, CN 1-0 is detected in 10 and CN...
Mass transport and hydrodynamic modelling for an annular flow bioreactor (2001)
Paper describing mass transport and hydrodynamic modelling for an annular flow bioreactor.
Mass transport and hydrodynamic modelling for an annular flow bioreactor (2001)
Paper describing mass transport and hydrodynamic modelling for an annular flow bioreactor.
Mass transport and hydrodynamic modelling for an annular flow bioreactor (2001)
Paper describing mass transport and hydrodynamic modelling for an annular flow bioreactor.
Electrostatic spinning for tissue engineering applications (2001)
Paper examining electrostatic spinning for tissue engineering applications.
0 transition in a sample of 20 Seyfert galaxies in order to test the result of Heckman et al. (1989), who find that type 2 Seyferts have a higher molecular gas content than type 1 Seyferts. From our...