Are gamma-ray bursts cosmological?

Details Are gamma-ray bursts cosmological? Are gamma-ray bursts cosmological?

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jkps...35s.629h&link_type=abstract

Journal of the Korean Physical Society, Vol. 35, p. S629 - S632

Mathematics

Logic

Gamma-Ray Bursts: Origin, Gamma-Ray Bursts: Cosmology

Scientific paper

Gamma-ray burst sources are distributed with a high level of isotropy, which is compatible with either a cosmological origin or an extended Galactic halo origin. The brightness distribution is another indicator used to characterize the spatial distribution in distance. In this paper the author discusses detailed fits of the BATSE gamma-ray burst peak-flux distributions with Friedmann models taking into account possible density evolution and standard candle luminosity functions. A chi-square analysis is used to estimate the goodness of the fits and the author derives the significance level of limits on the density evolution and luminosity function parameters. Cosmological models provide a good fit over a range of parameter space which is physically reasonable.

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