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The 6dF Galaxy Survey: a low-redshift benchmark for bulge-dominated galaxies

Published online by Cambridge University Press:  01 July 2007

Matthew Colless ,
Heath Jones ,
Rob Proctor ,
Craig Harrison ,
Lachlan Campbell  and
Philip Lah
Matthew Colless
Affiliation:
Anglo-Australian Observatory, Epping, NSW, Australia email: colless@aao.gov.au
Heath Jones
Affiliation:
Anglo-Australian Observatory, Epping, NSW, Australia email: colless@aao.gov.au
Rob Proctor
Affiliation:
Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC, Australia
Craig Harrison
Affiliation:
Anglo-Australian Observatory, Epping, NSW, Australia email: colless@aao.gov.au Research School of Astronomy and Astrophysics, Australian National University, Weston Creek, ACT, Australia
Lachlan Campbell
Affiliation:
Anglo-Australian Observatory, Epping, NSW, Australia email: colless@aao.gov.au Research School of Astronomy and Astrophysics, Australian National University, Weston Creek, ACT, Australia
Philip Lah
Affiliation:
Research School of Astronomy and Astrophysics, Australian National University, Weston Creek, ACT, Australia
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Abstract

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The 6dF Galaxy Survey provides a very large sample of galaxies with reliable measurements of Lick line indices and velocity dispersions. This sample can be used to explore the correlations between mass and stellar population parameters such as age, metallicity and [α/Fe]. Preliminary results from such an analysis are presented here, and show that age and metallicity are significantly anti-correlated for both passive and star-forming galaxies. Passive galaxies have strong correlations between mass and metallicity and between age and α-element over-abundance, which combine to produce a downsizing relation between age and mass. For old passive galaxies, the different trends of M/L with mass and luminosity in different passbands result from the differential effect of the mass–metallicity relation on the luminosities in each passband. Future work with this sample will examine the Fundamental Plane of bulge-dominated galaxies and the influence of environment on relations between stellar population parameters and mass.

Keywords

galaxies: bulgesgalaxies: stellar contentgalaxies: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S245: Formation and Evolution of Galaxy Bulges , July 2007 , pp. 399 - 402
Copyright
Copyright © International Astronomical Union 2008

References

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