Issue |
Astron. Astrophys. Suppl. Ser.
Volume 139, Number 1, October I 1999
|
|
---|---|---|
Page(s) | 1 - 24 | |
DOI | https://doi.org/10.1051/aas:1999373 | |
Published online | 15 October 1999 |
HI observations of blue compact galaxies from the first and second Byurakan surveys*
1
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
Received:
11
August
1998
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
© European Southern Observatory (ESO), 1999