Tidal disruption events on to stellar black holes in triples

作者: Giacomo Fragione , Nathan W C Leigh , Rosalba Perna , Bence Kocsis

DOI: 10.1093/MNRAS/STZ2213

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摘要: Stars passing too close to a black hole can produce tidal disruption events (TDEs), when the force across star exceeds gravitational that binds it. TDEs have usually been discussed in relation massive holes reside centres of galaxies or lurk clusters. In this paper, we investigate possibility triple stars hosting stellar (SBH) may be sources TDEs. We start from system made up three main sequence (MS) and model supernova (SN) kick event led production an inner binary comprised SBH. evolve these triples isolation with high precision $N$-body code study their as result Kozai-Lidov oscillations. explore variety distributions natal kicks imparted during SN event, various maximum initial separations for triples, different eccentricities. show parameter governs properties SBH-MS binaries which TDE is mean velocity distribution. Smaller $\sigma$'s lead larger outer semi-major axes systems undergo TDE, smaller SBH masses, longer timescales. find fraction roughly independent conditions, while estimate rate $7.3\times 10^{-5}-4.1 \ \mathrm{yr}^{-1}$, depending on prescriptions adopted kicks. This almost comparable expected holes.

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