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GRB Host Galaxies and Galaxy Evolution

Published online by Cambridge University Press:  21 April 2007

E. Emsellem ,
H. Wozniak ,
G. Massacrier ,
J.-F. Gonzalez ,
J. Devriendt ,
N. Champavert ,
S. Courty ,
G. Björnsson  and
E.H. Gudmundsson
S. Courty
Affiliation:
Science Institute, University of Iceland, Dunhaga 3, IS–107 Reykjavik, Iceland
G. Björnsson
Affiliation:
Science Institute, University of Iceland, Dunhaga 3, IS–107 Reykjavik, Iceland
E.H. Gudmundsson
Affiliation:
Science Institute, University of Iceland, Dunhaga 3, IS–107 Reykjavik, Iceland
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Abstract

Galaxy properties in general and properties of host galaxies ofgamma-ray bursts (GRBs) in particular are investigated, usingN-body/Eulerian hydrodynamic simulations and the stellar populationsynthesis model, Starburst99. We identify simulated galaxiesthat have optical star formation rate and SFR-to-luminosity ratiosimilar to those observed in a well-defined sample of ten hostgalaxies. The specific rates of the numerical counterparts are equalto or higher than the median values estimated at the differentredshifts. At intermediate redshift, our overall population shows thatthe faintest and bluest galaxies are also the objects with the highestspecific rates. These results suggest that GRB host galaxies arelikely to be drawn from the high specific SFR sub-population ofgalaxies, rather than the high SFR galaxy population.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 24: CRAL-2006. Chemodynamics: From First Stars to Local Galaxies , 2007 , pp. 283 - 284
Copyright
© EAS, EDP Sciences, 2007

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