Data di Pubblicazione:
2018
Citazione:
On the Papaloizou–Pringle instability in tidal disruption events / R. Nealon, D.J. Price, C. Bonnerot, G. Lodato. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - 474:2(2018), pp. 1737-1745. [10.1093/mnras/stx2871]
Abstract:
We demonstrate that the compact, thick disc formed in a tidal disruption event may be unstable to non-axisymmetric perturbations in the form of the Papaloizou–Pringle instability. We show this can lead to rapid redistribution of angular momentum that can be parametrized in terms of an effective Shakura–Sunyaev α parameter. For remnants that have initially weak magnetic fields, this may be responsible for driving mass accretion prior to the onset of the magnetorotational instability. For tidal disruptions around a 106 M black hole, the measured accretion rate is super-Eddington but is not sustainable over many orbits. We thus identify a method by which the torus formed in tidal disruption event may be significantly accreted before the magnetorotational instability is established.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
accretion; accretion discs; black hole physics; hydrodynamics
Elenco autori:
N. Rebecca, P. Daniel J., B. Clément, G. Lodato
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