Star formation efficiency and host galaxies of Gamma-Ray Bursts

Courty, S. and Björnsson, G. and Gudmundsson, E. H. (2005) Star formation efficiency and host galaxies of Gamma-Ray Bursts. Il nuovo cimento C, 28 (4\5). pp. 661-664. ISSN 1826-9885

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Gamma-ray bursts are likely to be associated with regions of active star formation and may therefore be useful as cosmological tracers of galaxy formation. Using hydrodynamical/N-body simulations the cosmological properties of host galaxies are investigated. Assuming the hosts to be efficient star-forming objects, i.e. with high specific star formation rates, the majority of the candidate hosts are found to below mass, young galaxies with a moderate star formation rate. This picture, consistent with most observations of GRB host galaxies, corroborates the idea that gamma-ray bursts do not follow the cosmic star formation rate. More importantly the hosts should contribute to unveil the faint end of the galaxy luminosity function.

Item Type: Article
Additional Information: Paper presented at the “4th Workshop on Gamma-Ray Burst in the Afterglow Era”, Rome, October 18-22, 2004.
Uncontrolled Keywords: Origin, formation, evolution, age, and star formation ; γ-ray sources; γ-ray bursts ; Statistical and correlative studies of properties (luminosity and mass functions; mass-to-light ratio; Tully-Fisher relation, etc.)
Subjects: 500 Scienze naturali e Matematica > 520 Astronomia e scienze connesse
Depositing User: Marina Spanti
Date Deposited: 16 Mar 2020 17:56
Last Modified: 16 Mar 2020 17:56

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