Nuza2006 长暴宿主星系在等级理论中的模拟

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astro-ph/0611122 [abs, ps, pdf, other] :

Title: The host galaxies of long-duration GRBs in a cosmological hierarchical scenario
Authors: Sebastian E. Nuza, Patricia B. Tissera, Leonardo J. Pellizza, Diego G. Lambas, Cecilia Scannapieco, Maria E. De Rossi
Comments: 9 pages, 9 figures, submitted to MNRAS

We developed a Monte Carlo code to generate long-duration gamma ray burst (LGRB) events within cosmological hydrodynam ical simulations consistent with the concordance $\Lambda$CDM model. As structure is assembled, LGRBs are generated in the substructure that formed galaxies today. We adopted the collapsar model so that LGRBs are produced by single, mas sive stars at the final stage of their evolution. We found that the observed properties of the LGRB host galaxies (HGs) are reproduced if LGRBs are also required to be generated by low metallicity stars. The low metallicity condition imposed on the progenitor stars of LGRBs selects a sample of HGs with mean gas abundances of 12 + log O/H $\approx 8.6$. For $z<1$>