Constraining the Merger History of Primordial-Black-Hole Binaries from GWTC-3
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
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2022
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| _version_ | 1866910894873640960 |
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| author | Liu, Lang You, Zhi-Qiang Wu, You Chen, Zu-Cheng |
| author_facet | Liu, Lang You, Zhi-Qiang Wu, You Chen, Zu-Cheng |
| contents | Primordial black holes (PBHs) can be not only cold dark matter candidates but also progenitors of binary black holes observed by LIGO-Virgo-KAGRA (LVK) Collaboration. The PBH mass can be shifted to the heavy distribution if multi-merger processes occur. In this work, we constrain the merger history of PBH binaries using the gravitational wave events from the third Gravitational-Wave Transient Catalog (GWTC-3). Considering four commonly used PBH mass functions, namely the log-normal, power-law, broken power-law, and critical collapse forms, we find that the multi-merger processes make a subdominant contribution to the total merger rate. Therefore, the effect of merger history can be safely ignored when estimating the merger rate of PBH binaries. We also find that GWTC-3 is best fitted by the log-normal form among the four PBH mass functions and confirm that the stellar-mass PBHs cannot dominate cold dark matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2210_16094 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Constraining the Merger History of Primordial-Black-Hole Binaries from GWTC-3 Liu, Lang You, Zhi-Qiang Wu, You Chen, Zu-Cheng Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology Primordial black holes (PBHs) can be not only cold dark matter candidates but also progenitors of binary black holes observed by LIGO-Virgo-KAGRA (LVK) Collaboration. The PBH mass can be shifted to the heavy distribution if multi-merger processes occur. In this work, we constrain the merger history of PBH binaries using the gravitational wave events from the third Gravitational-Wave Transient Catalog (GWTC-3). Considering four commonly used PBH mass functions, namely the log-normal, power-law, broken power-law, and critical collapse forms, we find that the multi-merger processes make a subdominant contribution to the total merger rate. Therefore, the effect of merger history can be safely ignored when estimating the merger rate of PBH binaries. We also find that GWTC-3 is best fitted by the log-normal form among the four PBH mass functions and confirm that the stellar-mass PBHs cannot dominate cold dark matter. |
| title | Constraining the Merger History of Primordial-Black-Hole Binaries from GWTC-3 |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2210.16094 |