| Issue |
A&A
Volume 454, Number 1, July IV 2006
|
|
|---|---|---|
| Page(s) | 119 - 123 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20065110 | |
| Published online | 03 July 2006 | |
Oxygen abundance variations in the system of the two blue compact dwarf galaxies SBS 0335-052E and SBS 0335-052W
1
Institute for Astrophysics, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany e-mail: papade@astro.physik.uni-goettingen.de
2
Main Astronomical Observatory, Ukrainian National Academy of Sciences, Zabolotnoho 27, Kyiv 03680, Ukraine
3
Astronomy Department, University of Virginia, Charlottesville, VA 22903, USA
Received:
2
December
2005
Accepted:
16
March
2006
We present 3.6 m ESO telescope spectroscopic observations
of the system of the two blue compact dwarf galaxies SBS 0335-052 W and SBS 0335-052 E.
The oxygen abundance in SBS 0335-052W is 
, confirming
that this galaxy is the most metal-deficient emission-line galaxy known.
We find that the oxygen abundance in SBS 0335-052E varies from region to region
in the range from 7.20 to 7.31, suggesting the presence of an abundance gradient
over a spatial scale of 
1 kpc.
Signatures of early carbon-type Wolf-Rayet stars are detected in cluster #3
of SBS 0335-052 E, corresponding to the emission of 20 to 130 WC4 stars, depending on the adopted luminosity of a single WC4 star in the
C iv λ4658 emission line.
Key words: galaxies: fundamental parameters / galaxies: starburst / galaxies: abundances
© ESO, 2006
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