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arXiv 2109.04512astro-ph.HE
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利用无线电和引力波观测对Milky Way脉冲星-黑洞群的深入了解

Insights into the Milky Way pulsar--black hole population using radio and gravitational wave observations

Nihan Pol, Maura McLaughlin, Duncan Lorimer

摘要:

LIGO-Virgo探测到的两次NS-BH合并首次直接证实了宇宙中存在这种类型的系统。这些发现也暗示了脉冲星-黑洞(PSR-BH)系统的存在。在本分析中,我们利用当前无线电调查中未检测到任何PSR-BH系统来估计银河系中向地球发射的$\sim$ 150 PSR-BH二元系统的95%上限。这对应于LIGO-Virgo网络合并检测率的95\%上限为$\mathcal{R}_{\rm LIGO} = 7.6$ ~yr $^{-1}$,其范围距离为100~Mpc,这与LIGO-Virgo得出的速率一致。此外,我们首次使用LIGO-Virgo的合并检测率估计来预测银河系中可检测的PSR-BH系统的数量。我们发现在银河系中存在$\left< N_{\rm obs, NSBH, e} \right> = 2^{+5}_{-1}$和$\left< N_{\rm obs, NSBH, p} \right> = 6^{+7}_{-4}$可探测的PSR-BH系统,分别对应于LIGO-Virgo估计的基于事件和基于人口的合并探测率。我们估计的概率检测这些PSR-BH系统与目前的无线电脉冲星调查,表明阿雷西博PALFA调查有最高的概率检测PSR-BH系统,而最近委托和计划的望远镜调查几乎保证检测到这些系统之一。最后,我们讨论了检测PSR-BH系统的障碍,以及如何在未来克服这些障碍。

英文摘要:

The detection of two NS--BH mergers by LIGO-Virgo provided the first direct confirmation of the existence of this type of system in the Universe. These detections also imply the existence of pulsar--black hole (PSR--BH) systems. In this analysis, we use the non-detection of any PSR--BH systems in current radio surveys to estimate a 95\% upper limit of $\sim$150 PSR--BH binary systems that are beaming towards the Earth in the Milky Way. This corresponds to a 95\% upper limit of $\mathcal{R}_{\rm LIGO} = 7.6$~yr$^{-1}$ on the merger detection rate for the LIGO-Virgo network scaled to a range distance of 100~Mpc, which is consistent with the rates derived by LIGO-Virgo. In addition, for the first time, we use the merger detection rates estimate by LIGO-Virgo to predict the number of detectable PSR--BH systems in the Milky Way. We find there to be $\left< N_{\rm obs, NSBH, e} \right> = 2^{+5}_{-1}$ and $\left< N_{\rm obs, NSBH, p} \right> = 6^{+7}_{-4}$ detectable PSR--BH systems in the Milky Way corresponding to the event-based and population-based merger detection rates estimated by LIGO-Virgo respectively. We estimate the probability of detecting these PSR--BH systems with current radio pulsar surveys, showing that the Arecibo PALFA survey has the highest probability of detecting a PSR--BH system, while surveys with recently commissioned and planned telescopes are almost guaranteed to detect one of these systems. Finally, we discuss the hurdles in detecting PSR--BH systems and how these can be overcome in the future.

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。

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