Are gamma-ray bursts cosmological?

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

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 we discuss 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 we derive 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.

Original languageEnglish
JournalJournal of the Korean Physical Society
Volume35
Issue numberSUPPL. 3
Publication statusPublished - 1999

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gamma ray bursts
luminosity
brightness distribution
galactic halos
isotropy
spatial distribution
estimates

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Are gamma-ray bursts cosmological? / Horváth, I.

In: Journal of the Korean Physical Society, Vol. 35, No. SUPPL. 3, 1999.

Research output: Contribution to journalArticle

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