arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.04857astro-ph.GA
收藏

Euclid对原初黑洞的引力微透镜约束

Gravitational microlensing constraints on primordial black holes by Euclid

Lindita Hamolli, Mimoza Hafizi, Francesco De Paolis, Achille A. Nucita

摘要:

原始黑洞(PBH)可能在宇宙的早期阶段通过大密度扰动的坍缩形成。根据形成机制的不同,PBH可能存在于今天的星系晕中,质量范围很广,从大约10^{-14}Msun到数千甚至更多的太阳质量。引力微透镜是约束原初黑洞(PBH)的最稳健和最强大的方法,因为它不要求透镜对象直接可见。我们计算的光学深度和率的微透镜事件所造成的PBH最终分布在银河系晕,对一些选定的方向的观察。然后,我们讨论了欧几里得,一个空间望远镜,可能会执行微透镜观测在其名义上的使命结束时,探测的PBH人口的星系晕的能力。

英文摘要:

Primordial black holes (PBHs) may form in the early stages of the Universe via the collapse of large density perturbations. Depending on the formation mechanism, PBHs may exist and populate today the galactic halos and have masses in a wide range, from about 10^{-14}Msun up to thousands, or more, of solar masses. Gravitational microlensing is the most robust and powerful method to constrain primordial black holes (PBHs), since it does not require that the lensing objects be directly visible. We calculate the optical depth and the rate of microlensing events caused by PBHs eventually distributed in the Milky Way halo, towards some selected directions of observation. Then we discuss the capability of Euclid, a space-based telescope which might perform microlensing observations at the end of its nominal mission, to probe the PBH populations in the Galactic halo.

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。

↑