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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 225884.0, MPI für Astronomie / Publikationen_mpia
Sky distribution of Gamma-ray bursts: AN
observational test of the Friedmannian Universe
models
Authors:Vavrek, R.; Balázs, L. G.; Mészáros, A.; Bagoly, Z.; Horváth, I.
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Baltic Astronomy
Volume:13
Start Page:231
End Page:234
Review Status:not specified
Audience:Not Specified
Abstract / Description:If the Universe is described by the
Friedmannian model, then the objects located at
redshifts larger than z‚‚sime; 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.
Free Keywords:cosmology; gamma-rays: bursts
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:17 K‚‚ouml;nigstuhl, D-69117, Heidelberg,
Germany), AB(Konkoly Observatory, POB 67, H-1505,
Budapest, Hungary), AC(Astronomical Institute of
Charles University, V
Hole‚‚scaron;ovi‚‚ccaron;k‚‚aacute;ch 2, CZ-180
00, Prague 8, Czech Republic), AD(Laboratory for
Information Technology, E‚‚ouml;tv‚‚ouml;s
University, P‚‚aacute;zm‚‚aacute;ny P. s. 1/A,
H-1117, Budapest, Hungary), AE(Department of
Physics, Bolyai Military University, POB 12,
H-1456, Budapest, Hungary)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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