Numerical simulation of small perturbation on an accretion disk due to the collision of a star with the disk near the black hole

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dc.contributor.authorDoenmez, Orhan
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2006
dc.departmentNiğde ÖHÜ
dc.description.abstractIn this paper, perturbations of an accretion disk by a star orbiting around a black hole are studied. We report on a numerical experiment, which has been carried out by using a parallel-machine code originally developed by Donmez (2004). An initially steady state accretion disk near a non-rotating (Schwarzschild) black hole interacts with a "star", modeled as an initially circular region of increased density. Part of the disk is affected by the interaction. In some cases, a gap develops and shock wave propagates through the disk. We follow the evolution for order of one dynamical period and we show how the non-axisymetric density perturbation further evolves and moves downwards where the material of the disk and the star become eventually accreted onto the central body. When the star perturbs the steady state accretion disk, the disk around the black hole is destroyed by the effect of perturbation. The perturbed accretion disk creates a shock wave during the evolution and it loses angular momentum when the gas hits on the shock waves. Colliding gas with the shock wave is the one of the basic mechanism of emitting the X-rays in the accretion disk. The series of supernovae occurring in the inner disk could entirely destroy the disk in that region which leaves a more massive black hole behind, at the center of galaxies.
dc.identifier.doi10.1007/s10509-006-9066-3
dc.identifier.endpage196
dc.identifier.issn0004-640X
dc.identifier.issue2
dc.identifier.scopus2-s2.0-33751165248
dc.identifier.scopusqualityQ3
dc.identifier.startpage187
dc.identifier.urihttps://dx.doi.org/10.1007/s10509-006-9066-3
dc.identifier.urihttps://hdl.handle.net/11480/5477
dc.identifier.volume305
dc.identifier.wosWOS:000242145300011
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorDoenmez, Orhan
dc.language.isoen
dc.publisherSPRINGER
dc.relation.ispartofASTROPHYSICS AND SPACE SCIENCE
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectnumerical relativity
dc.subjecthydrodynamics
dc.subjectblack hole
dc.subjectaccretion disk
dc.subjectstar-disk interaction
dc.subjectspiral shock wave
dc.titleNumerical simulation of small perturbation on an accretion disk due to the collision of a star with the disk near the black hole
dc.typeArticle

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