On the development of the Papaloizou-Pringle instability of the black hole-torus systems and quasi-periodic oscillations

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dc.contributor.authorDonmez, O.
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2014
dc.departmentNiğde ÖHÜ
dc.description.abstractWe present the numerical study of dynamical instability of a pressure-supported relativistic torus, rotating around the black hole with a constant specific angular momentum on a fixed space-time background, in case of perturbation by a matter coming from the outer boundary. Two-dimensional hydrodynamical equations are solved at equatorial plane using the high resolution shock capturing method to study the effect of perturbation on the stable systems. We have found that the perturbed torus creates an instability which causes the gas falling into the black hole in a certain dynamical time. All the models indicate an oscillating torus with certain frequency around their instant equilibrium. The dynamic of the accreted torus varies with the size of initial stable torus, black hole spin and other variables, such as Mach number, sound speed, cusp location of the torus, etc. The mass accretion rate is slightly proportional to the torus-to-hole mass ratio in the black hole-torus system, but it strongly depends on the cusp location of the torus. The cusp located in the equipotential surfaces of the effective potential moves outwards into the torus. The dynamical change of the torus increases the mass accretion rate and triggers the Papaloizou-Pringle instability. It is also observed that the growth of the m = 1 mode of the Papaloizou-Pringle instability occurs for a wide range of fluid and hydrodynamical parameters and a black hole spin. We have also computed the quasi-periodic oscillations from the oscillating relativistic torus.
dc.description.sponsorshipNational Center for High Performance Computing of Turkey (UYBHM) [10022007]
dc.description.sponsorshipWe would like to thank the anonymous referee for constructive comments on the original version of the manuscript. The numerical calculations were performed at the National Center for High Performance Computing of Turkey (UYBHM) under grant number 10022007.
dc.identifier.doi10.1093/mnras/stt2255
dc.identifier.endpage858
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.issue1
dc.identifier.scopus2-s2.0-84892496167
dc.identifier.scopusqualityQ1
dc.identifier.startpage846
dc.identifier.urihttps://dx.doi.org/10.1093/mnras/stt2255
dc.identifier.urihttps://hdl.handle.net/11480/4203
dc.identifier.volume438
dc.identifier.wosWOS:000330457100081
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorDonmez, O.
dc.language.isoen
dc.publisherOXFORD UNIV PRESS
dc.relation.ispartofMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectblack hole physics
dc.subjecthydrodynamics
dc.subjectinstabilities
dc.subjectX-rays: general
dc.titleOn the development of the Papaloizou-Pringle instability of the black hole-torus systems and quasi-periodic oscillations
dc.typeArticle

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