Sky distribution of gamma-ray bursts: An observational test of the Friedmannian Universe models

R. Vavrek, L. G. Balázs, A. Mészáros, Z. Bagoly, I. Horváth

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

If the Universe is described by the Friedmannian model, then the objects located at redshifts larger than z ≃ 0.1 should be distributed isotropically on the sky. In order to fulfil the Cosmological Principle for these redshifts, the objects should be distributed homogeneously and isotropically. Various statistical isotropy tests are surveyed. Spherical tesselation, graph theoretical and multiscale methods are used to test the intrinsic isotropy of GRBs. The long gamma-ray bursts being at these redshifts - show the isotropy; however, the conclusion is not decisive yet. Contrary to this, the short and intermediate bursts are not distributed isotropically; however, the redshifts are not known for these objects yet.

Original languageEnglish
Pages (from-to)231-234
Number of pages4
JournalBaltic Astronomy
Volume13
Issue number2
Publication statusPublished - Dec 1 2004

Keywords

  • Cosmology
  • Gamma-rays: bursts

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Sky distribution of gamma-ray bursts: An observational test of the Friedmannian Universe models'. Together they form a unique fingerprint.

  • Cite this