| Title | Population Properties of Gravitational-wave Neutron Star-Black Hole Mergers |
| Authors | Zhu, Jin-Ping Wu, Shichao Qin, Ying Zhang, Bing Gao, He Cao, Zhoujian |
| Affiliation | Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-30167 Hannover, Germany Leibniz Univ Hannover, D-30167 Hannover, Germany Anhui Normal Univ, Dept Phys, Wuhu 241000, Anhui, Peoples R China Univ Nevada, Nevada Ctr Astrophys, Las Vegas, NV 89154 USA Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China |
| Keywords | SPIN-ORBIT MISALIGNMENT ACTIVE GALACTIC NUCLEI GAMMA-RAY BURSTS ELECTROMAGNETIC COUNTERPART MASS-DISTRIBUTION LUMINOSITY FUNCTION COMPACT OBJECTS KILONOVA CONSTRAINTS EVOLUTION |
| Issue Date | 1-Apr-2022 |
| Publisher | ASTROPHYSICAL JOURNAL |
| Abstract | Over the course of the third observing run of the LIGO-Virgo-KAGRA Collaboration, several gravitational-wave (GW) neutron star-black hole (NSBH) candidates have been announced. By assuming that these candidates are real signals with astrophysical origins, we analyze the population properties of the mass and spin distributions for GW NSBH mergers. We find that the primary BH mass distribution of NSBH systems, whose shape is consistent with that inferred from the GW binary BH (BBH) primaries, can be well described as a power law with an index of alpha = 4.8(-2.8)(+4.5) plus a high-mass Gaussian component peaking at similar to 33(-9)(+14) M-circle dot. The NS mass spectrum could be shaped as a nearly flat distribution between similar to 1.0 and 2.1 M-circle dot. The constrained NS maximum mass agrees with that inferred from NSs in our Galaxy. If GW190814 and GW200210 are NSBH mergers, the posterior results of the NS maximum mass would be always larger than similar to 2.5 M-circle dot and significantly deviate from that inferred in Galactic NSs. The effective inspiral spin and effective precession spin of GW NSBH mergers are measured to potentially have near-zero distributions. The negligible spins for GW NSBH mergers imply that most events in the universe should be plunging events, which support the standard isolated formation channel of NSBH binaries. More NSBH mergers to be discovered in the fourth observing run would help to more precisely model the population properties of cosmological NSBH mergers. |
| URI | http://hdl.handle.net/20.500.11897/642011 |
| ISSN | 0004-637X |
| DOI | 10.3847/1538-4357/ac540c |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 |
