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The Distances of Cosmic γ-ray Bursts and Their Distribution

机译:宇宙γ射线爆发的距离及其分布

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摘要

Taking the effect of the expansion of the universe, jet effect and the association of γ-ray bursts with supernovae into consideration, we have studied the space distribution of γ-ray bursts. Assuming a Gaussian distribution of the opening angle and that the rate of bursts is proportional to the rate of star formation, we find the best fitting parameters to be θ_0 = 0.1, and σ = 0.04, implying that the opening angles are concentrated about 0.1 rad, in agreement with the current analyses on γ-ray bursts with known redshifts. The maximum redshift calculated from is 4.2, and the energy of γ-ray burst is 1.5 * 10~(51) ergs.
机译:考虑到宇宙膨胀,射流效应以及超新星产生的γ射线爆发的关联,我们研究了γ射线爆发的空间分布。假设张角的高斯分布和爆发率与恒星形成的比例成正比,我们发现最佳拟合参数为θ_0= 0.1和σ= 0.04,这意味着张角集中在0.1 rad左右。 ,与目前对已知红移的γ射线猝发的分析一致。根据计算出的最大红移为4.2,并且γ射线猝发的能量为1.5 * 10〜(51)ergs。

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