Accretion-mediated spin–eccentricity correlations in LISA massive black hole binaries
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| Název: | Accretion-mediated spin–eccentricity correlations in LISA massive black hole binaries |
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| Autoři: | Garg, Mudit, Tiede, Christopher, D’Orazio, Daniel J |
| Přispěvatelé: | University of Zurich, Garg, Mudit |
| Zdroj: | Garg, M, Tiede, C & D’orazio, D J 2024, ' Accretion-mediated spin–eccentricity correlations in LISA massive black hole binaries ', Monthly Notices of the Royal Astronomical Society, vol. 534, no. 4, pp. 3705-3712 . https://doi.org/10.1093/mnras/stae2357 |
| Publication Status: | Preprint |
| Informace o vydavateli: | Oxford University Press (OUP), 2024. |
| Rok vydání: | 2024 |
| Témata: | High Energy Astrophysical Phenomena (astro-ph.HE), Cosmology and Nongalactic Astrophysics (astro-ph.CO), 1912 Space and Planetary Science, 530 Physics, Astrophysics of Galaxies (astro-ph.GA), 3103 Astronomy and Astrophysics, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies, 10231 Department of Astrophysics, General Relativity and Quantum Cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | We examine expected effective spin ($\chi _{{\rm eff},1{\rm yr}}$) and orbital eccentricity ($e_{1\rm yr}$) correlations for a population of observable equal-mass massive black hole binaries (MBHBs) with total redshifted mass $M_z\sim [10^{4.5},10^{7.5}]~{{\rm M}_{\odot }}$ embedded in a circumbinary disc (CBD) at redshifts $z=1$ and $z=2$, 1 yr before merging in the Laser Interferometer Space Antenna (LISA) band. We find a strong correlation between measurable eccentricity and negative effective spin for MBHBs that are carried to merger by retrograde accretion. This is due to the well-established eccentricity pumping of retrograde accretion and less-well-established formation of retrograde mini-discs coupled with a stable retrograde CBD throughout the binary evolution from the self-gravitating radius. Conversely, prograde accretion channels result in positive $\chi _{{\rm eff},1\rm yr}$ and non-measurable $e_{1\rm yr}$ except for almost unity Eddington ratio and $M_z\lesssim 10^{5}~{{\rm M}_{\odot }}$ MBHBs at $z=1$. This clear contrast between the two CBD orientations – and particularly the unique signature of retrograde configurations – provides a promising way to unlock the mysteries of MBHB formation channels in the LISA era. |
| Druh dokumentu: | Article Other literature type |
| Popis souboru: | application/pdf; ZORA267068.pdf - application/pdf |
| Jazyk: | English |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stae2357 |
| DOI: | 10.5167/uzh-267068 |
| DOI: | 10.48550/arxiv.2405.04411 |
| Přístupová URL adresa: | http://arxiv.org/abs/2405.04411 https://curis.ku.dk/ws/files/411627449/stae2357.pdf https://www.zora.uzh.ch/id/eprint/267068/ https://doi.org/10.5167/uzh-267068 |
| Rights: | CC BY |
| Přístupové číslo: | edsair.doi.dedup.....e0430308c971f6a8601e62977fe96e13 |
| Databáze: | OpenAIRE |
Nájsť tento článok vo Web of Science | Abstrakt: | We examine expected effective spin ($\chi _{{\rm eff},1{\rm yr}}$) and orbital eccentricity ($e_{1\rm yr}$) correlations for a population of observable equal-mass massive black hole binaries (MBHBs) with total redshifted mass $M_z\sim [10^{4.5},10^{7.5}]~{{\rm M}_{\odot }}$ embedded in a circumbinary disc (CBD) at redshifts $z=1$ and $z=2$, 1 yr before merging in the Laser Interferometer Space Antenna (LISA) band. We find a strong correlation between measurable eccentricity and negative effective spin for MBHBs that are carried to merger by retrograde accretion. This is due to the well-established eccentricity pumping of retrograde accretion and less-well-established formation of retrograde mini-discs coupled with a stable retrograde CBD throughout the binary evolution from the self-gravitating radius. Conversely, prograde accretion channels result in positive $\chi _{{\rm eff},1\rm yr}$ and non-measurable $e_{1\rm yr}$ except for almost unity Eddington ratio and $M_z\lesssim 10^{5}~{{\rm M}_{\odot }}$ MBHBs at $z=1$. This clear contrast between the two CBD orientations – and particularly the unique signature of retrograde configurations – provides a promising way to unlock the mysteries of MBHB formation channels in the LISA era. |
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| ISSN: | 13652966 00358711 |
| DOI: | 10.1093/mnras/stae2357 |