HS 2134+0400—a new very metal-poor galaxy, a representative of the void population?
Abstract
We present the 6-m SAO telescope spectroscopy of HS 2134+0400, a blue compact galaxy (BCG) discovered within the framework of a dedicated Hamburg/SAO survey for low-metallicity BCGs (HSS-LM). Its very low abundance of oxygen (12 + log(O/H) = 7.44) and other heavy elements (S, N, Ne, Ar) allows this dwarf galaxy to be assigned to the group of eight lowest-metallicity BCGs among the several thousand BCGs known in the nearby Universe. The measured heavy-element abundance ratios (S/O, Ne/O, N/O, and Ar/O) are in good agreement with the typical values found for other very metal-poor BCGs. The spatial location of HS 2134+0400 is atypical of the majority of BCGs: it lies in the Pegasus void, a large region with a very low density of galaxies with normal
- Publication:
-
Astronomy Letters
- Pub Date:
- April 2006
- DOI:
- 10.1134/S1063773706040025
- arXiv:
- arXiv:astro-ph/0508255
- Bibcode:
- 2006AstL...32..228P
- Keywords:
-
- PACS numbers 95.75.Fg - 95.85.Kr - 98.52.Sw - 98.52.Wz - 98.54.Ep - 98.54.Kt - 98.58.Hf - 98.62.Bj - 98.65.Dx-;
- 98.65.Fz;
- Astrophysics
- E-Print:
- 6 pages, including 2 tables and 2 postscript figures. Submitted to Astronomy Letters