论文标题
狩猎引力波黑孔与微透明
Hunting gravitational wave black holes with microlensing
论文作者
论文摘要
重力微透镜是以银河系（MW）寻找无形黑洞（BHS）的强大工具，包括隔离的BHS和二进制BHS在宽阔的轨道上与重力波观测互补的轨道。通过监视诸如MW Bulge区域之类的源恒星的人口稠密的区域，由于这些BHS，可以追求微透明事件。我们发现，如果BHS具有类似salpeter的质量功能，则扩展了超过3000万美元的$ \ odot $，并且与银河凸起和磁盘区域中的星星相似的速度和空间结构，BH种群是在微验光光弯曲光曲线$ \ gtrsim $ \ gtrsim $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ GTRESSITCALES的主要来源。这是由于对镜头质量的微透镜事件速率的敏感性提高了，对于$ m^2 $，对于此类长时间的事件而言。在10年内，鲁宾天文台的时空遗产调查（LSST）将在10年内的$ 2 \ times 10^{10} $星的监视观察结果使人们能够找到大约6美元\ times 10^5 $ bh微验证事件。我们评估了潜在的LSST节奏的效率，以表征BH微晶的光曲线，并发现几乎可以检测到长时间尺度的所有事件。
Gravitational microlensing is a powerful tool to search for a population of invisible black holes (BHs) in the Milky Way (MW), including isolated BHs and binary BHs at wide orbits that are complementary to gravitational wave observations. By monitoring highly populated regions of source stars like the MW bulge region, one can pursue microlensing events due to these BHs. We find that if BHs have a Salpeter-like mass function extended beyond $30M_\odot$ and a similar velocity and spatial structure to stars in the Galactic bulge and disk regions, the BH population is a dominant source of the microlensing events at long timescales of the microlensing light curve $\gtrsim 100~$days. This is due to a boosted sensitivity of the microlensing event rate to lens mass, given as $M^2$, for such long-timescale events. A monitoring observation of $2 \times 10^{10}$ stars in the bulge region over 10 years with the Rubin Observatory Legacy Survey of Space and Time (LSST) would enable one to find about $6\times 10^5$ BH microlensing events. We evaluate the efficiency of potential LSST cadences for characterizing the light curves of BH microlensing and find that nearly all events of long timescales can be detected.
