| Issue |
A&A
Volume 434, Number 3, May II 2005
|
|
|---|---|---|
| Page(s) | 935 - 938 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20052673 | |
| Published online | 18 April 2005 | |
Research Note
Hα imaging of the local volume galaxies
I. The NGC 6946 galaxy group
1
Special Astrophysical Observatory, Russian Academy of Sciences, N.Arkhyz, KChR, 369167, Russia e-mail: ikar@luna.sao.ru
2
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
Received:
11
January
2005
Accepted:
11
February
2005
We present new Hα imaging of all known dwarf
irregular companions to NGC 6946: UGC 11583, KK 251, KK 252, KKR 55,
KKR 56, Cepheus 1, KKR 59, and KKR 60. The galaxies span a range of
blue absolute magnitudes of [ -13.6, -17.6] , relative gas content
of [0.1, 2.5] 
, current star formation activity
of ![$[0.2, ~5.2]\times 10^{-2} ~M_{\odot}$](/articles/aa/abs/2005/18/aa2673-05/aa2673-05_tex_eq2.png)
yr-1, and timescale to exhaust the
current gas supply of [6, 86] Gyr.
Key words: galaxies: dwarf / stars: formation
© ESO, 2005
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