Publication: The magnetic Rayleigh-Taylor instability around astrophysical black holes
Дата
2019
Авторы
Papadopoulos, D. B.
Contopoulos, I.
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Аннотация
We investigate the development of the magnetic Rayleigh-Taylor instability at the inner edge of an astrophysical disc around a spinning central black hole. We solve the equations of general relativity that govern small amplitude oscillations of a discontinuous interface in a Keplerian disc threaded by an ordered magnetic field, and we derive a stability criterion that depends on the central black hole spin and the accumulated magnetic field. We also compare our results with the results of general relativistic magnetohydrodynamics simulations of black hole accretion flows that reach a magnetically arrested disk (MAD) state. We found that the instability growth time-scales that correspond to the simulation parameters are comparable to the corresponding time-scales for free-fall accretion from the ISCO onto the black hole. We thus propose that the Rayleigh-Taylor instability disrupts the accumulation of magnetic flux onto the black hole horizon as the disc reaches a MAD state.
Описание
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Цитирование
Papadopoulos, D. B. The magnetic Rayleigh-Taylor instability around astrophysical black holes / Papadopoulos, DB, Contopoulos, I // Monthly Notices of the Royal Astronomical Society. - 2019. - 483. - № 2. - P. 2325-2336;. - 10.1093/mnras/sty3167
URI
https://www.doi.org/10.1093/mnras/sty3167
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https://openrepository.mephi.ru/handle/123456789/16790
https://www.scopus.com/record/display.uri?eid=2-s2.0-85067063557&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000462258200068
https://openrepository.mephi.ru/handle/123456789/16790