The host galaxies of long-duration gamma-ray bursts in a cosmological hierarchical scenario

We developed a Monte Carlo code to generate long-duration gamma-ray burst (LGRB) events within cosmological hydrodynamical simulations consistent with the concordance A cold dark matter model. As structure is assembled, LGRBs are generated in the substructure that formed galaxies today. We adopted t...

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Detalles Bibliográficos
Publicado: 2007
Materias:
Cosmology: theory
Galaxy: abundances
Galaxy: evolution
Gamma-rays: bursts
Methods: N-body simulations
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v375_n2_p665_Nuza
http://hdl.handle.net/20.500.12110/paper_00358711_v375_n2_p665_Nuza
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00358711_v375_n2_p665_Nuza
record_format dspace
spelling paper:paper_00358711_v375_n2_p665_Nuza2023-06-08T15:01:22Z The host galaxies of long-duration gamma-ray bursts in a cosmological hierarchical scenario Cosmology: theory Galaxy: abundances Galaxy: evolution Gamma-rays: bursts Methods: N-body simulations We developed a Monte Carlo code to generate long-duration gamma-ray burst (LGRB) events within cosmological hydrodynamical simulations consistent with the concordance A cold dark matter 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, massive 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 ≈ 8.6. For z < 1 the simulated HGs of low-metallicity LGRB progenitors tend to be faint, slow rotators with high star formation efficiency, compared with the general galaxy population, in agreement with observations. At higher redshift, our results suggest that larger systems with high star formation activity could also contribute to the generation of LGRBs from low-metallicity progenitors since the fraction of low-metallicity gas available for star formation increases for all systems with look-back time. Under the hypothesis of our LGRB model, our results support the claim that LGRBs could be unbiased tracers of star formation at high redshifts. © 2007 RAS. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v375_n2_p665_Nuza http://hdl.handle.net/20.500.12110/paper_00358711_v375_n2_p665_Nuza
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cosmology: theory
Galaxy: abundances
Galaxy: evolution
Gamma-rays: bursts
Methods: N-body simulations
spellingShingle Cosmology: theory
Galaxy: abundances
Galaxy: evolution
Gamma-rays: bursts
Methods: N-body simulations
The host galaxies of long-duration gamma-ray bursts in a cosmological hierarchical scenario
topic_facet Cosmology: theory
Galaxy: abundances
Galaxy: evolution
Gamma-rays: bursts
Methods: N-body simulations
description We developed a Monte Carlo code to generate long-duration gamma-ray burst (LGRB) events within cosmological hydrodynamical simulations consistent with the concordance A cold dark matter 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, massive 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 ≈ 8.6. For z < 1 the simulated HGs of low-metallicity LGRB progenitors tend to be faint, slow rotators with high star formation efficiency, compared with the general galaxy population, in agreement with observations. At higher redshift, our results suggest that larger systems with high star formation activity could also contribute to the generation of LGRBs from low-metallicity progenitors since the fraction of low-metallicity gas available for star formation increases for all systems with look-back time. Under the hypothesis of our LGRB model, our results support the claim that LGRBs could be unbiased tracers of star formation at high redshifts. © 2007 RAS.
title The host galaxies of long-duration gamma-ray bursts in a cosmological hierarchical scenario
title_short The host galaxies of long-duration gamma-ray bursts in a cosmological hierarchical scenario
title_full The host galaxies of long-duration gamma-ray bursts in a cosmological hierarchical scenario
title_fullStr The host galaxies of long-duration gamma-ray bursts in a cosmological hierarchical scenario
title_full_unstemmed The host galaxies of long-duration gamma-ray bursts in a cosmological hierarchical scenario
title_sort host galaxies of long-duration gamma-ray bursts in a cosmological hierarchical scenario
publishDate 2007
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v375_n2_p665_Nuza
http://hdl.handle.net/20.500.12110/paper_00358711_v375_n2_p665_Nuza
_version_ 1768542683864760320

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