An HI survey for protogalaxies in the Centaurus and Fornax galaxy clusters

被引:18
作者
Barnes, DG
StaveleySmith, L
Webster, RL
Walsh, W
机构
[1] CSIRO,AUSTRALIA TELESCOPE NATL FACIL,EPPING,NSW 2121,AUSTRALIA
[2] UNIV NEW S WALES,SCH PHYS,SYDNEY,NSW 2052,AUSTRALIA
关键词
surveys; galaxies; clusters; individual; Centaurus; Eridanus; Fornax; radio lines;
D O I
10.1093/mnras/288.2.307
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The results of 21-cm neutral hydrogen survey observations, made using the 64-m Parkes telescope, are presented for two 8 degrees by 8 degrees fields, centred on the Centaurus and Fornax galaxy clusters, and a smaller 1 degrees.5 field in Eridanus. The purpose of the observations was to search for extended H I clouds with no clear optical counterparts. 31 previously catalogued galaxies were detected, with H I parameters for 16 being listed for the first time. One previously uncatalogued dwarf galaxy ('Wombat I', J0341-3851) was found near the Fornax cluster, Australia Telescope Compact Array observations give an Hi mass of 8 x 10(7) M-. and a diameter of 4 kpc for this object, which is also visible on UKST survey plates, However, no clouds with optically invisible counterparts were detected, We deduce a 99 per cent confidence limit on the total H I density of such objects in the cluster and near-cluster environment of Omega(H I) < 10(-2)h(-1)(delta V/100 km s(-1)).
引用
收藏
页码:307 / 318
页数:12
相关论文
共 56 条
[1]   LARGE PECULIAR VELOCITIES IN THE HYDRA-CENTAURUS SUPERCLUSTER [J].
AARONSON, M ;
BOTHUN, GD ;
CORNELL, ME ;
DAWE, JA ;
DICKENS, RJ ;
HALL, PJ ;
SHENG, HM ;
HUCHRA, JP ;
LUCEY, JR ;
MOULD, JR ;
MURRAY, JD ;
SCHOMMER, RA ;
WRIGHT, AE .
ASTROPHYSICAL JOURNAL, 1989, 338 (02) :654-676
[2]   1024-CHANNEL DIGITAL CORRELATOR [J].
ABLES, JG ;
COOPER, BFC ;
HUNT, AJ ;
MOOREY, GG ;
BROOKS, JW .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1975, 46 (03) :284-295
[3]   SPECTRAL EMISSION OF A SAMPLE OF IRAS GALAXIES .2. [J].
AGUERO, EL ;
SUAREZ, F ;
PAOLANTONIO, S .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1995, 107 (716) :959-965
[4]   SPECTRAL EMISSION OF A SAMPLE OF IRAS GALAXIES [J].
AGUERO, EL ;
CALDERON, JH ;
PAOLANTONIO, S ;
BOEDO, ES .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1994, 106 (703) :978-982
[5]  
BLANDHAWTHORN J, 1995, ASTROPHYS J, V447, pL77, DOI 10.1086/309575
[6]   ON THE CENTRAL SURFACE BRIGHTNESS PROBLEM IN DISK GALAXIES [J].
BOSMA, A ;
FREEMAN, KC .
ASTRONOMICAL JOURNAL, 1993, 106 (04) :1394-1404
[7]   DISCOVERY OF A HUGE LOW-SURFACE-BRIGHTNESS GALAXY - A PROTODISK GALAXY AT LOW REDSHIFT [J].
BOTHUN, GD ;
IMPEY, CD ;
MALIN, DF ;
MOULD, JR .
ASTRONOMICAL JOURNAL, 1987, 94 (01) :23-&
[8]   THE SPACE DENSITY OF LOW-PROFILE GAS-RICH GALAXIES AT THE PRESENT EPOCH [J].
BRIGGS, FH .
ASTRONOMICAL JOURNAL, 1990, 100 (04) :999-1005
[9]   A new I-band Tully-Fisher relation for the Fornax Cluster: Implication for the Fornax distance and local supercluster velocity field [J].
Bureau, M ;
Mould, JR ;
StaveleySmith, L .
ASTROPHYSICAL JOURNAL, 1996, 463 (01) :60-68
[10]   VLA OBSERVATIONS OF H-I-1225+01 [J].
CHENGALUR, JN ;
GIOVANELLI, R ;
HAYNES, MP .
ASTRONOMICAL JOURNAL, 1995, 109 (06) :2415-2427