Numerical simulation of the disk dynamics around the black hole: Bondi-Hoyle accretion

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dc.contributor.authorKoyuncu, Fahrettin
dc.contributor.authorDonmez, Orhan
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2014
dc.departmentNiğde ÖHÜ
dc.description.abstractWe have solved the General Relativistic Hydrodynamic (GRH) equations using the high resolution shock capturing scheme (HRSCS) to find out the dependency of the disk dynamics to the Mach number, adiabatic index, the black hole rotation parameter and the outer boundary of the computational domain around the non-rotating and rotating black holes. We inject the gas to computational domain at upstream and downstream regions at the same time with different initial conditions. It is found that variety of the mass accretion rates and shock cone structures strongly depend on Mach number and adiabatic index of the gas. The shock cones on the accretion disk are important physical mechanisms to trap existing oscillation modes, thereupon these trapped modes may generate strong X-rays observed by different X-ray satellites. Besides, our numerical approach also show that the shock cones produces the flip-flop oscillation around the black holes. The flip-flop instabilities which are monitored in our simulations may explain the erratic spin behavior of the compact objects (the black holes and neutron stars) seen from observed data.
dc.description.sponsorshipTUBITAK short-term RBD Funding Programme [109T519]
dc.description.sponsorshipAll the numerical calculations were done using the cluster in the National High Performance Computing Center at Istanbul Technical University (ITU). This work was supported by TUBITAK short-term RBD Funding Programme with project number 109T519.
dc.identifier.doi10.1142/S0217732314501156
dc.identifier.issn0217-7323
dc.identifier.issn1793-6632
dc.identifier.issue21
dc.identifier.scopus2-s2.0-84904398690
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://dx.doi.org/10.1142/S0217732314501156
dc.identifier.urihttps://hdl.handle.net/11480/4147
dc.identifier.volume29
dc.identifier.wosWOS:000339653600006
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherWORLD SCIENTIFIC PUBL CO PTE LTD
dc.relation.ispartofMODERN PHYSICS LETTERS A
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectBlack hole
dc.subjectBondi-Hoyle accretion
dc.subjectshock cone
dc.subjectinstability
dc.titleNumerical simulation of the disk dynamics around the black hole: Bondi-Hoyle accretion
dc.typeArticle

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