Astron. Astrophys. Suppl. Ser.
Volume 139, Number 1, October I 1999
|Page(s)||1 - 24|
|Published online||15 October 1999|
HI observations of blue compact galaxies from the first and second Byurakan surveys*
Astronomy Department, University of Virginia, Charlottesville, VA 22903, U.S.A.
2 Département d'Astronomie Extragalactique et de Cosmologie, Observatoire de Paris, F-92195 Meudon Cedex, France
3 Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnij Arkhyz, Karachai-Circessia 357147, Russia
4 Département de Radioastronomie ARPEGES, Observatoire de Paris, F-92195 Meudon Cedex, France
Send offprint request to: Trinh X. Thuan
Accepted: 24 November 1998
We present the results of a neutral hydrogen survey of 79 galaxies from a statistical sample of 88 Blue Compact Galaxies (BCGs) selected from the First and Second Byurakan objective prism surveys to have a HII region-like spectrum, an equivalent width of the [O III] line larger than , and a velocity km s-1. The detection rate for the statistical sample is 74%. HI masses range between and with the HI mass distribution peaking at . The full width at half-maximum of the HI profile varies between km s-1 and 160 km s-1, with a mean of ~ 92 km s-1. These small widths are characteristic of dwarf galaxies. For comparison, we have also observed an additional 92 BCGs with weaker star formation and/or larger distances, and/or interesting astrophysical properties. These in general have larger widths and HI masses.
Key words: galaxies: compact / galaxies: ism / galaxies: startburst / radio lines: galaxies / radio lines: ISM
Tables 1, 2, 3 also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (188.8.131.52) or via http://cdsweb.u-strasbg.fr/Abstract.html
© European Southern Observatory (ESO), 1999