| Title | Searching for Candidates of Coalescing Binary Black Holes Formed through Chemically Homogeneous Evolution in GWTC-3 |
| Authors | Qin, Ying Wang, Yuan-Zhu Bavera, Simone S. Wu, Shichao Meynet, Georges Wang, Yi-Ying Hu, Rui-Chong Zhu, Jin-Ping Wu, Dong-Hong Shu, Xin-Wen Peng, Fang-Kun Song, Han-Feng Wei, Da-Ming |
| Affiliation | Anhui Normal Univ, Dept Phys, Wuhu 241000, Anhui, Peoples R China Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210033, Peoples R China Univ Geneva, Dept Astron, Chemin Pegasi 51, CH-1290 Versoix, Switzerland Univ Geneva, Grav Wave Sci Ctr GWSC, CH-1211 Geneva, Switzerland Albert Einstein Inst, Max Planck Inst Gravitationsphys, D-30167 Hannover, Germany Leibniz Univ Hannover, D-30167 Hannover, Germany Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210033, Peoples R China Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China Guizhou Univ, Coll Phys, Guiyang 550025, Guizhou, Peoples R China |
| Keywords | COMPACT OBJECTS STAR-CLUSTERS NEUTRON-STAR B-STARS RATES SPIN MERGERS CHANNELS SYSTEMS YOUNG |
| Issue Date | 1-Dec-2022 |
| Publisher | ASTROPHYSICAL JOURNAL |
| Abstract | The LIGO, Virgo, and KAGRA (LVK) Collaboration has announced 90 coalescing binary black holes (BBHs) with p (astro) > 50% to date; however, the origin of their formation channels is still an open scientific question. Given various properties of BBHs (BH component masses and individual spins) inferred using the default priors by the LVK, independent groups have been trying to explain the formation of the BBHs with different formation channels. Of all formation scenarios, the chemically homogeneous evolution (CHE) channel has stood out with distinguishing features, namely, nearly equal component masses and preferentially high individual spins aligned with the orbital angular momentum. We perform Bayesian inference on the BBH events officially reported in GWTC-3 with astrophysically predicted priors representing different formation channels of the isolated binary evolution (common-envelope evolution channel, CEE; CHE; stable mass transfer, SMT). Given assumed models, we report strong evidence for GW190517_055101 being most likely to have formed through the CHE channel. Assuming the BBH events in the subsample are all formed through one of the isolated binary evolution channels, we obtain the lower limits on the local merger rate density of these channels at 11.45 Gpc(-3) yr(-1) (CEE), 0.18 Gpc(-3) yr(-1) (CHE), and 0.63 Gpc(-3) yr(-1) (SMT) at 90% credible level. |
| URI | http://hdl.handle.net/20.500.11897/667875 |
| ISSN | 0004-637X |
| DOI | 10.3847/1538-4357/aca40c |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 |
