论文标题
强力波动事件的低延迟电磁随访的天体物理动机排名标准
An astrophysically motivated ranking criterion for low-latency electromagnetic follow-up of gravitational wave events
论文作者
论文摘要
我们研究了跨宇宙时间紧凑型二元合并的宿主星系的性质。为此，我们将种群综合模拟与从流体动力学宇宙学模拟鹰相结合的星系目录，以得出二进制中子星（BNS），黑洞中的星星（BHNS）和二进制黑洞（BBH）和二进制黑洞（BBH）的合并的宿主星系的性质。在此框架内，我们得出了主机星系概率，即，银河系托管紧凑型二元合并的概率是其恒星质量，星形形成率，$ k_s $ $幅度和$ b $ $幅度的函数。该数量对于重力波（GW）来源的低延迟搜索尤其重要，因为它提供了一种方法，可以将位于给定GW检测的可信区域内的星系进行排列，从而减少可行的宿主候选者的数量。此外，即使未检测到电磁对应物，建议的排名准则仍然可以用于对误差框中包含的星系进行分类。我们的结果表明，$ k_s $ band中的大型星系（或等效的高光度的星系）具有较高的托管BNS，BHNS和BBH合并的可能性。我们提供以合适格式的概率，以在未来的低延迟搜索中实现。
We investigate the properties of the host galaxies of compact binary mergers across cosmic time. To this end, we combine population synthesis simulations together with galaxy catalogues from the hydrodynamical cosmological simulation EAGLE to derive the properties of the host galaxies of binary neutron star (BNS), black hole-neutron star (BHNS) and binary black hole (BBH) mergers. Within this framework, we derive the host galaxy probability, i.e., the probability that a galaxy hosts a compact binary coalescence as a function of its stellar mass, star formation rate, $K_s$ magnitude and $B$ magnitude. This quantity is particularly important for low-latency searches of gravitational wave (GW) sources as it provides a way to rank galaxies lying inside the credible region in the sky of a given GW detection, hence reducing the number of viable host candidates. Furthermore, even if no electromagnetic counterpart is detected, the proposed ranking criterion can still be used to classify the galaxies contained in the error box. Our results show that massive galaxies (or equivalently galaxies with a high luminosity in $K_s$ band) have a higher probability of hosting BNS, BHNS, and BBH mergers. We provide the probabilities in a suitable format to be implemented in future low-latency searches.
