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The HIPASS catalogue - III. Optical counterparts and isolated dark galaxies


Doyle, MT and Drinkwater, MJ and Rohde, DJ and Pimbblet, KA and Read, M and Meyer, MJ and Zwaan, MA and Ryan-Weber, E and Stevens, JB and Koribalski, BS and Webster, RL and Staveley-Smith, L and Barnes, DG and Howlett, M and Kilborn, VA and Waugh, M and Pierce, MJ and Bhathal, R and de Blok, WJG and Disney, MJ and Ekers, RD and Freeman, KC and Garcia, DA and Gibson, BK and Harnett, J and Henning, PA and Jerjen, H and Kesteven, MJ and Knezek, PM and Mader, S and Marquarding, M and Minchin, RF and O'Brien, J and Oosterloo, T and Price, RM and Putman, ME and Ryder, SD and Sadler, EM and Stewart, IM and Stootman, F and Wright, AE, The HIPASS catalogue - III. Optical counterparts and isolated dark galaxies, Monthly Notices of the Royal Astronomical Society, 361, (1) pp. 34-44. ISSN 0035-8711 (2005) [Refereed Article]

DOI: doi:10.1111/j.1365-2966.2005.09159.x


We present the largest catalogue to date of optical counterparts for H I radio-selected galaxies, HOPCAT. Of the 4315 H I radio-detected sources from the H I Parkes All Sky Survey (HIPASS) catalogue, we find optical counterparts for 3618 (84 percent) galaxies. Of these, 1798 (42 per cent) have confirmed optical velocities and 848 (20 per cent) are single matches without confirmed velocities. Some galaxy matches are members of galaxy groups. From these multiple galaxy matches, 714 (16 per cent) have confirmed optical velocities and a further 258 (6 per cent) galaxies are without confirmed velocities. For 481 (11 per cent), multiple galaxies are present but no single optical counterpart can be chosen and 216 (5 per cent) have no obvious optical galaxy present. Most of these 'blank fields' are in crowded fields along the Galactic plane or have high extinctions. Isolated 'dark galaxy' candidates are investigated using an extinction cut of A Bj < 1 mag and the blank-fields category. Of the 3692 galaxies with an A Bj extinction < 1 mag, only 13 are also blank fields. Of these, 12 are eliminated either with follow-up Parkes observations or are in crowded fields. The remaining one has a low surface brightness optical counterpart. Hence, no isolated optically dark galaxies have been found within the limits of the HIPASS survey. © 2005 RAS.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Stevens, JB (Dr Jamie Stevens)
ID Code:46664
Year Published:2005
Web of Science® Times Cited:164
Deposited By:Physics
Deposited On:2007-08-29
Last Modified:2007-08-29

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