SBSG 0335−052W: An Extremely Low Metallicity Dwarf Galaxy | Zendy

V. A. Lipovetsky | Zendy; Frederic H. Chaffee | Zendy; Y. I. Izotov | Zendy; Craig B. Foltz | Zendy; A. Y. Kniazev | Zendy; U. Hopp | Zendy

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SBSG 0335−052W: An Extremely Low Metallicity Dwarf Galaxy

Author(s) -

V. A. Lipovetsky,

Frederic H. Chaffee,

Y. I. Izotov,

Craig B. Foltz,

A. Y. Kniazev,

U. Hopp

Publication year - 1999

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/307335

Subject(s) - physics , astrophysics , metallicity , dwarf galaxy , galaxy , astronomy , photometry (optics) , stellar population , redshift , star formation , stars

We present Multiple Mirror Telescope (MMT) and Keck II telescope 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. The components, separated by 22 kpc, appear to be members of a unique, physically connected system. It is shown that SBS 0335-052W consists of at least three stellar clusters and has the same redshift as SBS 0335-052. The oxygen abundance in its two brightest knots is extremely low, 12+log(O/H)= 7.22+/-0.03 and 7.13+/-0.08, respectively. These values are lower than in SBS 0335-052 and are nearly the same as those in I Zw 18. The (R-I) color profiles are very blue in both galaxies due to the combined effects of ionized gas and a young stellar population emission. We argue that SBS 0335-052W is likely to be a nearby, young dwarf galaxy

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