We present 21-cm observations of a 10 × 2 deg2 region in the Virgo cluster, obtained as part of the Arecibo Galaxy Environment Survey. 289 sources are detected over the full redshift range (−2000 < vhel < +20 000 km s−1) with 95 belonging to the cluster (vhel < 3000 km s−1). We combine our observations with data from the optically selected Virgo Cluster Catalogue (VCC) and the...
We present 21-cm observations of a 5 × 1 deg2 region in the Virgo cluster, obtained as part of the Arecibo Galaxy Environment Survey. 13 cluster members are detected, together with 36 objects in the background. We compare and contrast the results from this area with a larger 10 × 2 deg2 region. We combine the two data sets to produce an H i mass function, which shows a higher...
We have conducted the first blind H i survey covering 480 deg2 and a heliocentric velocity range from 300 to 1900 km s−1 to investigate the H i content of the nearby spiral-rich Ursa Major region and to look for previously uncatalogued gas-rich objects. Here we present the catalogue of H i sources. The H i data were obtained with the four-beam receiver mounted on the 76.2-m...
One explanation for the disparity between cold dark matter (CDM) predictions of galaxy numbers and observations could be that there are numerous dark galaxies in the Universe. These galaxies may still contain baryons, but no stars, and may be detectable in the 21-cm line of atomic hydrogen. The results of surveys for such objects, and simulations that do/do not predict their...
We analyse the properties of three unusual dwarf galaxies in the Centaurus A group discovered with the HIPASS survey. From their optical morphology, they appear to be low surface brightness dwarf spheroidals, yet they are gas rich (MH i/LB > 1) with gas-mass-to-stellar light ratios larger than typical dwarf irregular galaxies. Therefore these systems appear different from any...
extractor (Polyfind, written by R. F. Minchin) based on a peak flux threshold. The automatic extractor is essentially based on the cross-correlation with templates method described by Davies et al. (2001
We have carried out an extremely long integration time (9000 s beam−1) 21-cm blind survey of 60 deg2 in Centaurus using the Parkes multibeam system. We find that the noise continues to fall as throughout, enabling us to reach an H i column-density limit of 4.2 × 1018 cm−2 for galaxies with a velocity width of 200 km s−1 in the central 32 deg2 region, making this the deepest...
Minchin et al. have recently placed limits on the cosmological significance of gas-rich low surface brightness (LSB) galaxies as a proportion of the total population of gas-rich galaxies by carrying out a very deep survey (HIDEEP) for neutral hydrogen (H i) with the Parkes multibeam system. Such a survey avoids the surface brightness selection effects that limit the usefulness of...
The Arecibo Galaxy Environment Survey (AGES) is one of several H i surveys utilizing the new Arecibo L-band Feed Array (ALFA) fitted to the 305-m radio telescope at Arecibo. The survey is specifically designed to investigate various galactic environments to higher sensitivity, higher velocity resolution and higher spatial resolution than previous fully sampled, 21-cm multibeam...
Epidemiologic studies have suggested that aromatic amines (and nitroaromatic hydrocarbons) may be carcinogenic for human pancreas. Pancreatic tissues from 29 organ donors (13 smokers, 16 non-smokers) were examined for their ability to metabolize aromatic amines and other carcinogens. Microsomes showed no activity for cytochrome P450 (P450) 1A2-dependent N-oxidation of 4...
R. Bhathal 9 W. J. G. de Blok 4 P. J. Boyce 8 M. J. Disney 8 R. D. Ekers 4 K. C. Freeman 7 B. K. Gibson 10 P. A. Henning 12 H. Jerjen 7 P. M. Knezek 11 B. Koribalski 4 M. Marquarding 4 R. F. Minchin 8
. Kesteven 12 P. M. Knezek 3 B. S. Koribalski 12 S. Mader 12 M. Marquarding 12 R. F. Minchin 4 J. O'Brien 14 M. E. Putman 1 S. D. Ryder 2 E. M. Sadler 0 J. Stevens 11 13 I. M. Stewart 9 F. Stootman 19 M. Waugh
11 M. J. Kesteven 15 P. M. Knezek 4 B. S. Koribalski 15 S. Mader 15 M. Marquarding 15 R. F. Minchin 16 J. O'Brien 11 T. Oosterloo 5 R. M. Price 7 M. E. Putman 2 S. D. Ryder 3 E. M. Sadler 0 I. M
. Garcia 12 B. K. Gibson 16 J. Harnett 11 P. A. Henning 6 M. Howlett 16 H. Jerjen 17 M. J. Kesteven 15 V. A. Kilborn 7 16 P. M. Knezek 4 B. S. Koribalski 15 S. Mader 15 M. Marquarding 15 R. F. Minchin 12 J
P. A. Henning 6 H. Jerjen 8 M. J. Kesteven 14 P. M. Knezek 3 S. Mader 14 M. Marquarding 14 R. F. Minchin 7 J. O'Brien 8 T. Oosterloo 4 R. M. Price 6 M. E. Putman 1 S. D. Ryder 2 E. M. Sadler 0 I. M
. Koribalski 8 R. C. Kraan-Korteweg D. F. Malin 3 M. Marquarding 8 R. F. Minchin 12 J. R. Mould 14 R. M. Price 4 M. E. Putman 14 S. D. Ryder 3 E. M. Sadler 9 A. Schro der 1 F. Stootman 11 R. L. Webster 15 W. E
