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Stellar populations and AGN in the bulges of SDSS galaxies

Published online by Cambridge University Press:  01 December 2006

Vivienne Wild ,
Guinevere Kauffmann  and
Tim Heckman
Vivienne Wild
Affiliation:
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild Str. 1, 85748 Garching, Germany
Guinevere Kauffmann
Affiliation:
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild Str. 1, 85748 Garching, Germany
Tim Heckman
Affiliation:
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD21218, US
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Abstract

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We present a new method for measuring the recent star formation history (SFH) of galaxies from their 4000Å break and Balmer absorption line strength. By making use of the whole 3750-4150Å spectral region, the method achieves a higher signal-to-noise ratio than traditional indices. The new technique is ideally suited to finding evidence for weak or old starbursts in good quality spectra, or studying post-starburst galaxies at high redshift. On application to massive, bulge dominated galaxies in the SDSS, we find clear correlations between the recent star formation history of bulges and the properties of the AGN.

Keywords

galaxies: bulgesgalaxies: activemethods: statistical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 529 - 530
Copyright
Copyright © International Astronomical Union 2007

References

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