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26 April 2024 |
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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
; | | Date: |
31 Jul 1996 | | Subject: | astro-ph | | Affiliation: | Special Astrophysical Observatory, Russia, MMT Observatory, University of Arizona, Main Astronomical Observatory, Ukraine, Universitats-Sternwarte, Munich, Germany | | 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. | | Source: | arXiv, astro-ph/9607164 | | Services: | Forum | Review | PDF | Favorites | |
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