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- · arXiv e-print (arXiv:0908.2427)
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| Title: |
| Properties of Long Gamma-Ray Burst Host Galaxies in Cosmological Simulation |
| Authors: |
| Campisi, M. A.; De Lucia, G.; Li, L. -X.; Mao, S.; Kang, X. |
| Publication: |
| eprint arXiv:0908.2427 |
| Publication Date: |
| 08/2009 |
| Origin: |
| ARXIV |
| Keywords: |
| Astrophysics - Cosmology and Extragalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena |
| Comment: |
| The paper contains 14 figures and 2 tables. Accepted MNRAS |
| Bibliographic Code: |
| 2009arXiv0908.2427C |
Abstract
We use galaxy catalogues constructed by combining high-resolution N-body simulations with semi-analytic models of galaxy formation to study the properties of Long Gamma-Ray Burst (LGRB) host galaxies. We assume that LGRBs originate from the death of massive young stars and analyse how results are affected by different metallicity constraints on the progenitor stars. As expected, the host sample with no metallicity restriction on the progenitor stars provides a perfect tracer of the cosmic star formation history. When LGRBs are required to be generated by low-metallicity stars, they trace a decreasing fraction of the cosmic star formation rate at lower redshift, as a consequence of the global increase in metallicity. We study the properties of host galaxies up to high redshift (~9), finding that they typically have low-metallicity (Z<0.5>
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