Influence of tidal dissipation on outcomes of binary-single encounters between stars and black holes in stellar clusters
| Autor: | Lucas Hellström, Abbas Askar, Alessandro A Trani, Mirek Giersz, Ross P Church, Johan Samsing |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
DISRUPTION
COLLISIONS COMPACT BINARIES CODE FOS: Physical sciences Astronomy and Astrophysics numerical [methods] Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics - Astrophysics of Galaxies ) binaries (including multiple): close [(stars] CLOSE BINARIES EVOLUTION SIMULATIONS MOCCA-SURVEY DATABASE Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science gravitation Astrophysics of Galaxies (astro-ph.GA) star clusters: general [galaxies] GLOBULAR-CLUSTERS ALGORITHMIC REGULARIZATION Astrophysics::Earth and Planetary Astrophysics kinematics and dynamics [stars] Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics |
| Zdroj: | Hellstrom, L, Askar, A, Trani, A A, Giersz, M, Church, R P & Samsing, J 2022, ' Influence of tidal dissipation on outcomes of binary-single encounters between stars and black holes in stellar clusters ', Monthly Notices of the Royal Astronomical Society, vol. 517, no. 2, pp. 1695-1708 . https://doi.org/10.1093/mnras/stac2808 |
| Popis: | In the cores of dense stellar clusters, close gravitational encounters between binary and single stars can frequently occur. Using the Tsunami code, we computed the outcome of a large number of binary-single interactions involving two black holes (BHs) and a star to check how the inclusion of orbital energy losses due to tidal dissipation can change the outcome of these chaotic interactions. Each interaction was first simulated without any dissipative processes and then we systematically added orbital energy losses due to gravitational wave emission (using post-Newtonian (PN) corrections) and dynamical tides and recomputed the interactions. We find that the inclusion of tides increases the number of BH-star mergers by up to 75 per cent but it does not affect the number of BH-BH mergers. These results highlight the importance of including orbital energy dissipation due to dynamical tides during few-body encounters and evolution of close binary systems within stellar cluster simulations. Consistent with previous studies, we find that the inclusion of PN terms increases the number of BH-BH mergers during binary-single encounters. However, BH-star mergers are largely unaffected by the inclusion of these terms. 14 pages, 6 figures, 12 tables, accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|