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Study of Blue Compact Dwarf Galaxies at Redshift 0.2 ~ 0.5 UsingSDSS DR7

Published online by Cambridge University Press:  11 July 2011

M. Koleva ,
Ph. Prugniel ,
I. Vauglin ,
J. Chung ,
E.-C. Sung ,
S.-C. Rey ,
S. Kim ,
Y. Lee  and
J. Kyeong
J. Chung
Affiliation:
Department of Astronomy and Space science, Chungnam National University, Daejeon, Korea Korea Astronomy and Space Science Institute, Daejeon, Korea
E.-C. Sung
Affiliation:
Korea Astronomy and Space Science Institute, Daejeon, Korea
S.-C. Rey
Affiliation:
Department of Astronomy and Space science, Chungnam National University, Daejeon, Korea
S. Kim
Affiliation:
Department of Astronomy and Space science, Chungnam National University, Daejeon, Korea
Y. Lee
Affiliation:
Department of Astronomy and Space science, Chungnam National University, Daejeon, Korea
J. Kyeong
Affiliation:
Korea Astronomy and Space Science Institute, Daejeon, Korea
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Abstract

We present a mass-metallicity (M–Z) relation of 412 blue compact dwarf galaxies at z = 0.2 ~ 0.5 using the Sloan Digital Sky Survey (SDSS) DR7 spectroscopic data. We found a variation of mass-metallicity relations depending on the redshift in which metallicity evolution of low mass galaxies appear to be stronger than that of high mass galaxies. The specific star formation rate (SSFR) shows tight correlation with galaxy mass in the sense that low mass galaxies have substantially high SSFR. We also discuss environmental effect in the SSFR vs galaxy mass relation. At a given mass, merging system shows systematically higher SSFR than isolated one.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 48: CRAL-2010 A Universe of Dwarf Galaxies , 2011 , pp. 127 - 128
Copyright
© EAS, EDP Sciences, 2011

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