Report
Accretion mediated spin-eccentricity correlations in LISA massive black hole binaries
| العنوان: | Accretion mediated spin-eccentricity correlations in LISA massive black hole binaries |
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| المؤلفون: | Garg, Mudit, Tiede, Christopher, D'Orazio, Daniel J. |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, General Relativity and Quantum Cosmology |
| الوصف: | 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), one-year before merging in the 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 the formation of retrograde CBD-aligned mini-discs, as observed in hydrodynamical simulations. Conversely, prograde accretion channels result in positive $\chi_{{\rm eff},1\rm yr}$ and non-measurable $e_{1\rm yr}$. 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. Comment: Accepted by MNRAS. 8 pages and 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stae2357 |
| URL الوصول: | http://arxiv.org/abs/2405.04411 |
| رقم الانضمام: | edsarx.2405.04411 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stae2357 |
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