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 known decrease in the relative luminosity of the 158 micrometre C[II] line with the far-infrared luminosity in extragalactic sources is due to evolutionary...
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...
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...
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 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...
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...
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.
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,...
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,...
CN and HNC Line Emission in IR Luminous Galaxies (2001)
S. Aalto, A. G. Polatidis, S. J. Curran
We have observed HNC 1-0, CN 1-0 & 2-1 line emission in a sample of 13 IR luminous (LIRGs, LIR > 10 11 L ) starburst and Seyfert galaxies. HNC 1-0 is detected in 9, CN 1-0 is detected in 10 and CN...
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...
In order to test if the molecular "shells" observed by Charmandaris et al. (2000) could be due to a molecular outflow, we have mapped CO in J = 1 # 0 and 2 # 1 along the jet axis of Centaurus A....
S. J. Curran, A. G. Polatidis, S. Aalto
We use the data published in Paper I and Curran et al. (2000) to determine the global molecular gas luminosities and distributions in a sample of 22 Seyfert galaxies. From this we find definite...
S. J. Curran, P. Bergman, A. Heikkila, S. Aalto
We present results of a multi-transition study of the dense molecular gas in the central part of the hybrid star-burst/Seyfert galaxies NGC 4945 and the Circinus galaxy. From the results of radiative...
S. J. Curran, A. G. Polatidis, S. Aalto, R. S. Booth
In this paper we present large-scale maps of the J = 1 # 0 transitions of CO and HCN in a sample of 7 near-by Seyfert galaxies. These are the first large-scale maps of CO in NGCs 2273 and 5033 and of...
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.
Dierences in the dense gas between type 1 and type 2 Seyferts (2000)
We have used observations of the CO J = 1 # 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...
Dense molecular gas in Seyfert galaxies (2000)
S. J. Curran, S. Aalto, R. S. Booth
We have used the 20 m Onsala and 15 m SEST telescopes to observe the CO J = 1 # 0 (simultaneously with CO J = 2 # 1 at SEST) and HCN J = 1 # 0 (simultaneously with CS J = 3 # 2 at SEST) transitions...
Astronomy And Astrophysics (1999)
S. J. Curran, G. Rydbeck, R. S. Booth
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 associated with...
Astronomy And Astrophysics (1998)
S. J. Curran, G. Rydbeck, R. S. Booth
The Circinus galaxy, a type 2 Seyfert, is suspected to have a molecular gas ring structure with a diameter of # 500 pc. We have mapped the lowest three rotational transitions of 12 CO in the central...