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Outer stellar disks of lenticular galaxies

Published online by Cambridge University Press:  17 August 2012

Olga K. Sil'chenko
Olga K. Sil'chenko*
Affiliation:
Sternberg Astronomical Institute of the Lomonosov Moscow State University, University av. 13, 119991, Moscow, Russia email: [email protected]
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Abstract

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By studying the radial distribution of the properties of stellar populations in 15 nearby S0 galaxies, I have found that the outer stellar disks are mostly old, with SSP-equivalent ages of 8–15 Gyr, often being older than the bulges. This fact throws doubt on the currently accepted paradigm that S0 galaxies were formed at z=0.4 through the quenching of star formation in spiral galaxies.

Keywords

galaxies: elliptical and lenticularcDgalaxies: evolutiongalaxies: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S284: The Spectral Energy Distribution of Galaxies , September 2011 , pp. 251 - 253
Copyright
Copyright © International Astronomical Union 2012

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