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Fossil Galaxy Groups; Scaling Relations, Galaxy Properties and Formation of BCGs

Published online by Cambridge University Press:  01 August 2006

Habib G. Khosroshahi
Affiliation:
School of Physics and Astronomy, University of Birmingham, UK email: habib@star.sr.bham.ac.uk
T. J. Ponman
Affiliation:
School of Physics and Astronomy, University of Birmingham, UK email: habib@star.sr.bham.ac.uk
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Abstract

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We study fossil galaxy groups, their hot gas and the galaxy properties. Fossils are more X-ray luminous than non-fossil groups, however, they fall comfortably on the conventional L-T relation of galaxy groups and clusters indicating that their X-ray luminosity and temperature are both boosted, arguably, as a result of their early formation. The central dominant galaxy in fossils have optical luminosity comparable to the brightest cluster galaxies (BCGs), however, the isophotal shapes of the central galaxy in fossils are non-boxy in contrast to the isophotes of majority of the BCGs.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2007

References

Khochfar, S., & Burkert, A. 2005, MNRAS 359, 137.CrossRefGoogle Scholar
Khosroshahi, , Ponman, & Jones, 2006a, MNRAS submitted.Google Scholar
Khosroshahi, , Ponman, & Jones, 2006b, MNRAS Letters 372, 68.CrossRefGoogle Scholar