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The role of cold gas on the stellar mass - metallicity relation of nearby galaxies

Published online by Cambridge University Press:  17 July 2013

Thomas M. Hughes
Thomas M. Hughes*
Affiliation:
Kavli Institute for Astronomy & Astrophysics, Peking University, China email: [email protected]
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Abstract

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We investigate the relationship between stellar mass, metallicity and gas content for a magnitude- and volume-limited sample of 260 nearby late-type galaxies in different environments. Combining new oxygen abundance measurements with ultraviolet to near-infrared photometry and Hi 21 cm line observations, we observe the relationship between stellar mass and metallicity. We also find that, at fixed stellar mass, galaxies with lower gas fractions typically possess higher oxygen abundances. Gas-poor galaxies are typically more metal-rich. Our results indicate that internal evolutionary processes, rather than environmental effects, play a key role in shaping the stellar mass-metallicity relation.

Keywords

cosmology: observationsgalaxies: evolutiongalaxies: spiral
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S295: The intriguing life of massive galaxies , August 2012 , pp. 336
Copyright
Copyright © International Astronomical Union 2013 

References

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