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arXiv · astro-ph/9607164

SBS 0335-052W - a new, extremely low metallicity dwarf galaxy

V. A. Lipovetsky·F. Chaffee·C. Foltz·Yu. I. Izotov·A. Yu. Kniazev·Ulrich Hopp
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Abstract

We present Multiple Mirror Telescope (MMT) spectrophotometry and 3.5m Calar Alto telescope R, I photometry of the western component of the extremely low-metallicity blue compact galaxy SBS 0335-052. We argue that both components, separated by 24 kpc, are members of an unique, physically connected system. It is shown that SBS 0335-052W has the same redshift as SBS 0335-052 and has an extremely low oxygen abundance, 12 + log (O/H) = 7.45+-0.22, comparable to those in I Zw 18 and SBS 0335--052. The (R-I) color profiles are very blue in both galaxies due to the combined effect of ionized gas and a young stellar population. We argue that SBS 0335--052W is likely to be a nearby young dwarf galaxy with age not exceeding 10^8 yr. The implications of this conclusion to the question of galaxy formation and to the properties of primeval dwarf galaxies are discussed.

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V. A. Lipovetsky, F. Chaffee, C. Foltz, Yu. I. Izotov, A. Yu. Kniazev, Ulrich Hopp. 1996-07-30. SBS 0335-052W - a new, extremely low metallicity dwarf galaxy. https://arxiv.org/abs/astro-ph/9607164

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