Investigating the mixing between two black hole populations in LIGO-Virgo-KAGRA GWTC-3

Autor:	Ho, Ming-Feng, Perkins, Scott Ellis, Bird, Simeon, Dawson, William, Golovich, Nathan, Lu, Jessica R., McGill, Peter
Rok vydání:	2024
Předmět:	Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Cosmology and Nongalactic Astrophysics Astrophysics - Astrophysics of Galaxies Astrophysics - Solar and Stellar Astrophysics High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
Popis:	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. Comment: 19 pages, 11 figures. Submitted to PRD
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2408.09024 Zobrazit plný text záznamu View this record from Arxiv