The Impact of Initial–Final Mass Relations on Black Hole Microlensing
The Impact of Initial–Final Mass Relations on Black Hole Microlensing
复制标题
DOI：
10.3847/1538-4357/aca09d
复制
发表时间：
2022-11
期刊：
影响因子：
--
通讯作者：
S. Rose;C. Lam;Jessica R. Lu;M. Medford;M. Hosek;N. Abrams;Emily Ramey;S. S. V. U. O. California-S.-S.-V.-U.-O.-Ca
中科院分区：
文献类型：
--
作者：
S. Rose;C. Lam;Jessica R. Lu;M. Medford;M. Hosek;N. Abrams;Emily Ramey;S. S. V. U. O. California-S.-S.-V.-U.-O.-Ca
初终质量关系（IFMR）的不确定性长期以来一直是理解大质量恒星演化最后阶段的一个问题。限制IFMR的主要挑战之一是难以测量不发光残余物体（即中子星和黑洞）的质量。引力波探测器开启了在其他星系中发现大量致密天体的可能性，但都是在合并的双星系统中。利用天体测量学和光度学进行的引力透镜实验能够在银河系中发现孤立的和双星中的致密天体。在这项工作中，我们改进了紧凑物体透镜事件的种群合成（PopSyCLE）微透镜模拟代码，以探索使用银河系微透镜种群约束IFMR的可能性。我们预测罗马空间望远镜的微透镜调查将有可能根据爱因斯坦穿越时间分布的长端和微透镜视差分布的小端的差异来区分不同的ifmr，假设黑洞透镜的小（π E > 0.02）微透镜视差特征能够被精确测量。我们强调，未来的微透镜调查需要能够描述具有小微透镜视差的事件，以便对IFMR施加最有意义的约束。
Uncertainty in the initial–final mass relation (IFMR) has long been a problem in understanding the final stages of massive star evolution. One of the major challenges of constraining the IFMR is the difficulty of measuring the mass of nonluminous remnant objects (i.e., neutron stars and black holes). Gravitational-wave detectors have opened the possibility of finding large numbers of compact objects in other galaxies, but all in merging binary systems. Gravitational lensing experiments using astrometry and photometry are capable of finding compact objects, both isolated and in binaries, in the Milky Way. In this work we improve the Population Synthesis for Compact object Lensing Events (PopSyCLE) microlensing simulation code in order to explore the possibility of constraining the IFMR using the Milky Way microlensing population. We predict that the Roman Space Telescope’s microlensing survey will likely be able to distinguish different IFMRs based on the differences at the long end of the Einstein crossing time distribution and the small end of the microlensing parallax distribution, assuming the small (π E ≲ 0.02) microlensing parallaxes characteristic of black hole lenses are able to be measured accurately. We emphasize that future microlensing surveys need to be capable of characterizing events with small microlensing parallaxes in order to place the most meaningful constraints on the IFMR.