2005ApJ...632..210I

Query : 2005ApJ...632..210I

2005ApJ...632..210I - Astrophys. J., 632, 210-216 (2005/October-2)

SBS 0335-052W: the lowest metallicity star-forming galaxy known.

IZOTOV Y.I., THUAN T.X. and GUSEVA N.G.

Abstract (from CDS):

We present 4 m Kitt Peak telescope and 6.5 m MMT spectrophotometry of the extremely low metallicity galaxy SBS 0335-052W, the western companion of the blue compact dwarf galaxy SBS 0335-052E. These observations have been combined with published 10 m Keck data to derive for the brightest region of SBS 0335-052W an oxygen abundance 12+logO/H=7.12±0.03. This makes SBS 0335-052W the lowest metallicity star-forming galaxy known in the local universe. Using a Monte Carlo technique, we fit the spectral energy distribution of SBS 0335-052W to derive the age of the oldest stars contributing to its optical light. We find that star formation in SBS 0335-052W began less than 500 Myr ago, making it a likely nearby young dwarf galaxy.

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Journal keyword(s): Galaxies: Abundances - Galaxies: Evolution - Galaxies: Formation - Galaxies: Irregular - Galaxies: ISM - ISM: H II Regions - ISM: Abundances

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [PBT2001] SBSG 0335-052 W G 03 37 38.40 -05 02 37.5   19.14     18.85 ~ 110 1
2 SBSG 0335-052B G 03 37 44.04 -05 02 40.2   16.77 16.65   16.79 ~ 220 1
3 SBSG 0335-052 AGN 03 37 44.06 -05 02 40.2     16.65     ~ 500 1
4 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1

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