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The stellar mass-metallicity relations of galaxies from high-z to the local

Published online by Cambridge University Press:  01 August 2006

Y. C. Liang ,
F. Hammer  and
L. C. Deng
Y. C. Liang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China; email: [email protected]
F. Hammer
Affiliation:
GEPI, Observatoire de Paris-Meudon, 92195 Meudon, France
L. C. Deng
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China; email: [email protected]
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Abstract

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The stellar mass-metallicity relations of star-forming galaxies at intermediate-z (0.4<z<1) and high-z (z≥2) are compared with the local SDSS galaxies. It shows obvious evolutionary effect, i.e., at a given stellar mass, the intermediate-z galaxies show about 0.3 dex lower metallicity, and the high-z galaxies show about 0.56 dex more metal-deficient than the local ones. These distant galaxies will produce these important parts of their metals during the consequent evolutionary process. A close-box model can explain this evolutionary process generally.

Keywords

galaxies: abundancesevolutionhigh-redshiftISMspiralstarburst
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 414
Copyright
Copyright © International Astronomical Union 2007