McFACTS II: Mass Ratio--Effective Spin Relationship of Black Hole Mergers in the AGN Channel
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909000294989824 |
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| author | Cook, Harrison E. McKernan, Barry Ford, K. E. Saavik Delfavero, Vera Nathaniel, Kaila Postiglione, Jake Ray, Shawn McPike, Emily J. O'Shaughnessy, Richard |
| author_facet | Cook, Harrison E. McKernan, Barry Ford, K. E. Saavik Delfavero, Vera Nathaniel, Kaila Postiglione, Jake Ray, Shawn McPike, Emily J. O'Shaughnessy, Richard |
| contents | We use the Monte Carlo For AGN (active galactic nucleus) Channel Testing and Simulation (McFACTS, https://www.github.com/mcfacts/mcfacts) code to study the effect of AGN disk and nuclear star cluster parameters on predicted mass distributions for LIGO-Virgo-KAGRA (LVK) compact binaries forming in AGN disks. The assumptions we vary include the black hole (BH) initial mass function, disk model, disk size, disk lifetime, and the prograde-to-retrograde fraction of newly formed black hole binaries. Broadly we find that dense, moderately short-lived AGN disks are preferred for producing a $(q,χ_{\rm eff})$ anti-correlation like those identified from existing gravitational wave (GW) observations. Additionally, a BH initial mass function (MF $\propto M^{-2}$) is preferred over a more top-heavy MF ($M^{-1}$). The preferred fraction of prograde-to-retrograde is $>90\%$, to produce results consistent with observations. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_10590 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | McFACTS II: Mass Ratio--Effective Spin Relationship of Black Hole Mergers in the AGN Channel Cook, Harrison E. McKernan, Barry Ford, K. E. Saavik Delfavero, Vera Nathaniel, Kaila Postiglione, Jake Ray, Shawn McPike, Emily J. O'Shaughnessy, Richard High Energy Astrophysical Phenomena Astrophysics of Galaxies We use the Monte Carlo For AGN (active galactic nucleus) Channel Testing and Simulation (McFACTS, https://www.github.com/mcfacts/mcfacts) code to study the effect of AGN disk and nuclear star cluster parameters on predicted mass distributions for LIGO-Virgo-KAGRA (LVK) compact binaries forming in AGN disks. The assumptions we vary include the black hole (BH) initial mass function, disk model, disk size, disk lifetime, and the prograde-to-retrograde fraction of newly formed black hole binaries. Broadly we find that dense, moderately short-lived AGN disks are preferred for producing a $(q,χ_{\rm eff})$ anti-correlation like those identified from existing gravitational wave (GW) observations. Additionally, a BH initial mass function (MF $\propto M^{-2}$) is preferred over a more top-heavy MF ($M^{-1}$). The preferred fraction of prograde-to-retrograde is $>90\%$, to produce results consistent with observations. |
| title | McFACTS II: Mass Ratio--Effective Spin Relationship of Black Hole Mergers in the AGN Channel |
| topic | High Energy Astrophysical Phenomena Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2411.10590 |