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A CONSTRAINT ON THE DISTANCE SCALE TO COSMOLOGICAL GAMMA-RAY BURSTS

机译:宇宙伽玛射线暴距离尺度的矛盾

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摘要

If γ-ray bursts are cosmological in origin, the sources are expected to trace the large-scale structure of luminous matter in the universe. I use a new likelihood method that compares the counts-in-cells distribution of γ-ray bursts in the BATSE 3B catalog with that expected from the known large-scale structure of the universe, in order to place a constraint on the distance scale to cosmological bursts. I find, at the 95% confidence level, that the comoving distance to the "edge" of the burst distribution is greater than 630 h~(-1) Mpc (z > 0.25), and that the nearest burst is farther than 40 h~(-1) Mpc. The median distance to the nearest burst is 170 h~(-1) Mpc, implying that the total energy released in γ-rays during a burst event is of order 3 x 10~(51) h~(-2) ergs. None of the bursts that have been observed by BATSE are in nearby galaxies, nor is a signature from the Coma Cluster or the "Great Wall" likely to be seen in the data at present.
机译:如果γ射线的起源是宇宙学的,则预期这些源将追踪宇宙中发光物质的大规模结构。我使用一种新的似然方法,将BATSE 3B目录中γ射线猝发的细胞计数分布与已知的宇宙大尺度结构所期望的进行比较,以便对距离尺度施加约束宇宙爆发。我发现,在95%的置信度下,到突发分布“边缘”的共同移动距离大于630 h〜(-1)Mpc(z> 0.25),最近的突发超过40 h 〜(-1)Mpc。到最近爆发的中值距离为170 h〜(-1)Mpc,这意味着爆发事件期间γ射线释放的总能量约为3 x 10〜(51)h〜(-2)ergs。 BATSE观测到的所有爆发都没有在附近的星系中,目前在数据中也可能看不到昏迷星团或“长城”的特征。

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