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Sky Distribution of Gamma-Ray Bursts: an Observational Test of the Friedmannian Universe Models

Vavrek, Roland and Balázs, Lajos György and Mészáros, A. and Bagoly, Zsolt and Horváth, István (2004) Sky Distribution of Gamma-Ray Bursts: an Observational Test of the Friedmannian Universe Models. Baltic Astronomy, 13 (2). pp. 231-234. ISSN 1392-0049

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Abstract

If the Universe is described by the Friedmannian model, then the objects located at redshifts larger than z similar or equal to 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.

Item Type: Article
Subjects: Q Science / természettudomány > QB Astronomy, Astrophysics / csillagászat, asztrofizika
Depositing User: Erika Bilicsi
Date Deposited: 28 Mar 2013 13:09
Last Modified: 28 Mar 2013 13:09
URI: http://real.mtak.hu/id/eprint/4490

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