Gamma-Ray Bursts May Be Biased Tracers of Star Formation

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dc.creatorCen, Renyue
dc.creatorFang, Taotao
dc.date2007-10-24
dc.date.accessioned2026-07-07T08:38:19Z
dc.date.available2026-07-07T08:38:19Z
dc.descriptionBased on a simulation of galaxy formation in the standard cosmological model, we suggest that a consistent picture for Gamma-Ray Bursts and star formation may be found that is in broad agreement with observations: GRBs preferentially form in low metallicity environments and in galaxies substantially less luminous that L*. We find that the computed formation rate of stars with metallicity less than 0.1Zsun agrees remarkably well with the rate evolution of Gamma-Ray Bursts observed by Swift from z=0 to z=4, whereas the evolution of total star formation rate is weaker by a factor of about 4. Given this finding, we caution that any inference of star formation rate based on observed GRB rate may require a more involved exercise than a simple proportionality.
dc.descriptionsubmitted to ApJL, 4 pages
dc.identifierhttps://arxiv.org/abs/0710.4370
dc.identifierhttp://arxiv.org/abs/0710.4370
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/140687
dc.subjectAstrophysics
dc.titleGamma-Ray Bursts May Be Biased Tracers of Star Formation
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