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20 April 2024 |
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SBS 0335-052W - an Extremely Low Metallicity Dwarf Galaxy | | V.A.Lipovetsky
; F.H.Chaffee
; Y.I.Izotov
; C.B.Foltz
; A.Y.Kniazev
; U.Hopp
; | | Date: |
25 Feb 1999 | | Subject: | astro-ph | | Abstract: | 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. | | Source: | arXiv, astro-ph/9902368 | | Services: | Forum | Review | PDF | Favorites | |
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