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Chemical enrichment of ICM in a hierarchical galaxy formation model including SNe Ia

Published online by Cambridge University Press:  06 October 2004

Masahiro Nagashima
Affiliation:
Department of Physics, University of Durham, South Road, Durham DH1 3LE, U.K. Department of Physics, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan email: masa@scphys.kyoto-u.ac.jp
Cedric G. Lacey
Affiliation:
Department of Physics, University of Durham, South Road, Durham DH1 3LE, U.K.
Carlton M. Baugh
Affiliation:
Department of Physics, University of Durham, South Road, Durham DH1 3LE, U.K.
Carlos S. Frenk
Affiliation:
Department of Physics, University of Durham, South Road, Durham DH1 3LE, U.K.
Shaun Cole
Affiliation:
Department of Physics, University of Durham, South Road, Durham DH1 3LE, U.K.
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Abstract

Metal enrichment of intracluster medium (ICM) is reanalysed in the hierarchical galaxy formation scenario. In order to investigate metal abundances of $\alpha$ and iron-peak elements, we incorporate metal production processes by type Ia supernovae (SNe Ia) as well as type II supernovae (SNe II) into the GALFORM model of semi-analytic galaxy formation. We find that a top-heavy initial mass function (IMF) of stars with a power index $x\simeq 0.35$ for starburst is required under the constraint that the IMF for quiescent disc star formation is the Kennicutt IMF. Our model shows an only mild evolution of [Fe/H] as suggested by a recent observation.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Copyright
© 2004 International Astronomical Union
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