arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2210.09487astro-ph.CO
收藏

引力透镜对快瞬变事件率的影响

The Effect of Gravitational Lensing on Fast Transient Event Rates

Mawson W. Sammons, Clancy W. James, Cathryn M. Trott, Mark Walker

摘要:

快速宇宙学瞬变,如快速射电暴(FRB)和伽马射线暴(GRB),代表了一类比任何其他宇宙学物体更紧凑的源。因此,他们是敏感的显着放大,通过引力透镜从一类透镜,这是不受约束的观测今天。低质量的原始黑洞就是这样一个候选者,它可能构成宇宙暗物质的重要组成部分。目前的观测只限制了它们在附近宇宙中的密度,这使得来自宇宙学距离的快速瞬变有可能形成互补的约束。受此启发,我们计算的效果,引力透镜从宇宙学分布的紧凑的对象将对FRB和GRB的观测率。对于静态透镜的几何形状,我们排除了所有的FRB引力透镜的透镜质量的范围内的前景,并表明,透镜质量大于$10^{-5}M_\odot$可以限制在1.4 GHz的8000个非本地化的高通量FRB,可能会被检测到的下一代FRB发现望远镜。

英文摘要:

Fast cosmological transients such as fast radio bursts (FRBs) and gamma-ray bursts (GRBs) represent a class of sources more compact than any other cosmological object. As such they are sensitive to significant magnification via gravitational lensing from a class of lenses which are not well-constrained by observations today. Low-mass primordial black holes are one such candidate which may constitute a significant fraction of the Universe's dark matter. Current observations only constrain their density in the nearby Universe, giving fast transients from cosmological distances the potential to form complementary constraints. Motivated by this, we calculate the effect that gravitational lensing from a cosmological distribution of compact objects would have on the observed rates of FRBs and GRBs. For static lensing geometries, we rule out the prospect that all FRBs are gravitationally lensed for a range of lens masses and show that lens masses greater than $10^{-5}M_\odot$ can be constrained with 8000 un-localised high fluence FRBs at 1.4GHz, as might be detected by the next generation of FRB-finding telescopes.

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。

↑