Investigating the mixing between two black hole populations in LIGO-Virgo-KAGRA GWTC-3
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| author | Ho, Ming-Feng Perkins, Scott Ellis Bird, Simeon Dawson, William Golovich, Nathan Lu, Jessica R. McGill, Peter |
| author_facet | Ho, Ming-Feng Perkins, Scott Ellis Bird, Simeon Dawson, William Golovich, Nathan Lu, Jessica R. McGill, Peter |
| contents | We introduce a population model to analyze the mixing between hypothesised power-law and $\sim 35 M_\odot$ Gaussian bump black hole populations in the latest gravitational wave catalog, GWTC-3, estimating their co-location and separation. We find a relatively low level of mixing, $3.1^{+5.0}_{-3.1}\%$, between the power-law and Gaussian populations, compared to the percentage of mergers containing two Gaussian bump black holes, $5.0^{+3.2}_{-1.7}\%$. Our analysis indicates that black holes within the Gaussian bump are generally separate from the power-law population, with only a minor fraction engaging in mixing and contributing to the $\mathcal{M} \sim 14 M_\odot$ peak in the chirp mass. This leads us to identify a distinct population of Binary Gaussian Black Holes (BGBHs) that arise from mergers within the Gaussian bump. We suggest that current theories for the formation of the massive $35 M_\odot$ Gaussian bump population may need to reevaluate the underlying mechanisms that drive the preference for BGBHs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_09024 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Investigating the mixing between two black hole populations in LIGO-Virgo-KAGRA GWTC-3 Ho, Ming-Feng Perkins, Scott Ellis Bird, Simeon Dawson, William Golovich, Nathan Lu, Jessica R. McGill, Peter High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies Solar and Stellar Astrophysics High Energy Physics - Phenomenology We introduce a population model to analyze the mixing between hypothesised power-law and $\sim 35 M_\odot$ Gaussian bump black hole populations in the latest gravitational wave catalog, GWTC-3, estimating their co-location and separation. We find a relatively low level of mixing, $3.1^{+5.0}_{-3.1}\%$, between the power-law and Gaussian populations, compared to the percentage of mergers containing two Gaussian bump black holes, $5.0^{+3.2}_{-1.7}\%$. Our analysis indicates that black holes within the Gaussian bump are generally separate from the power-law population, with only a minor fraction engaging in mixing and contributing to the $\mathcal{M} \sim 14 M_\odot$ peak in the chirp mass. This leads us to identify a distinct population of Binary Gaussian Black Holes (BGBHs) that arise from mergers within the Gaussian bump. We suggest that current theories for the formation of the massive $35 M_\odot$ Gaussian bump population may need to reevaluate the underlying mechanisms that drive the preference for BGBHs. |
| title | Investigating the mixing between two black hole populations in LIGO-Virgo-KAGRA GWTC-3 |
| topic | High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies Solar and Stellar Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2408.09024 |