arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1406.3102astro-ph.HE
收藏

在BATSE现行GRB资料中寻找强引力透镜效应

Search for strong gravitational lensing effect in the current GRB data of BATSE

Chun-Yu Li, Li-Xin Li

摘要:

由于伽马射线暴(GRB)追踪高z宇宙,因此GRB被宇宙中的星系引力透镜的可能性很大。本文研究星系中暗物质晕对伽玛暴的引力透镜效应。假设所有的晕在$10^{10} h^{-1} M_\odot < M < 2\times 10^{13} h^{-1}M_\odot $质量范围内都具有奇异的等温球质量分布,所有的GRB样品都遵循由Swift LGRB样品导出的内禀红移分布和光度函数,我们分别计算了BATSE、Swift/BAT和Fermi/GBM GRB中的引力透镜几率.利用BATSE GRB中的导出概率结果,我们在BATSE 5 B GRB光谱目录中搜索了透镜GRB对。搜索没有发现任何令人信服的引力透镜事件。我们讨论了我们的结果和未来的观测伽玛暴透镜观测。

英文摘要:

Because gamma-ray bursts (GRBs) trace the high-z Universe, there is an appreciable probability for a GRB to be gravitational lensed by galaxies in the universe. Herein we consider the gravitational lensing effect of GRBs contributed by the dark matter halos in galaxies. Assuming that all halos have the singular isothermal sphere (SIS) mass profile in the mass range $10^{10} h^{-1} M_\odot < M < 2\times 10^{13} h^{-1}M_\odot $ and all GRB samples follow the intrinsic redshift distribution and luminosity function derived from the Swift LGRBs sample, we calculated the gravitational lensing probability in BATSE, Swift/BAT and Fermi/GBM GRBs, respectively. With an derived probability result in BATSE GRBs, we searched for lensed GRB pairs in the BATSE 5B GRB Spectral catalog. The search did not find any convincing gravitationally lensed events. We discuss our result and future observations for GRB lensing observation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑