Raikov 2010 伽玛暴的空间分布的不均匀性

主要内容:


精彩摘抄:

伽玛暴的红移分布和距离分布。

和伽玛暴关联的类星体的红移分布。

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Title:		Non-homogeneities in the spatial distribution of gamma-ray bursts
Authors:		Raikov, A. A.; Orlov, V. V.; Beketov, O. B.
Publication:		eprint arXiv:1001.4592
Publication Date:		01/2010
Origin:		ARXIV
Keywords:		Astrophysics - Cosmology and Extragalactic Astrophysics
Comment:		12 pages, 8 figures
Bibliographic Code:		2010arXiv1001.4592R

Abstract

In order to reveal possible non-homogeneities in the spatial distribution of long (T_90 > 2^s) gamma-ray bursts we have examined 201 of them with known redshifts z. For different functional forms of metric distance r(z)we use the distribution function f(l)of separations between objects. Asymptotically, for small l this function behaves like f(l)~l^{D-1} for fractal sets whose fractal dimension is D. It is revealed that for all of the considered forms of r(z) the spatial distribution of gamma-ray burst sources shows signs of fractality with D=2.2-2.5. A few spatially isolated groups of gamma-ray burst sources have been found, one of which has equatorial coordinates alpha extending from 23^h 56^m to 0^h 49^m and delta from +19^o to +23^o its redshifts being within the range of 0.81 to 0.94.

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