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Article: Matter accretion by brane-world black holes

TitleMatter accretion by brane-world black holes
Authors
KeywordsAccretion
Black holes
Brane-world models
Issue Date2009
PublisherHan'guk Mulli Hakhoe. The Journal's web site is located at http://www.kps.or.kr/home/kor/journal/JKPS/default.asp?globalmenu=4&localmenu=11
Citation
Journal of the Korean Physical Society, 2009, v. 54 n. 6 pt 1, p. 2583-2594 How to Cite?
AbstractThe brane-world description of our universe entails a large extra dimension and a fundamental scale of gravity that might be lower by several orders of magnitude compared to the Planck scale. An interesting consequence of the brane-world scenario is in the nature of spherically symmetric vacuum solutions to the brane gravitational field equations, with properties quite distinct as compared to the standard black-hole solutions of general relativity. We consider the spherically symmetric accretion of matter onto brane-worid black holes in terms of relativistic hydrodynamics by assuming that the inflowing gas obeys a polytropic equation of state. As a first step in this study, we consider the accretion process iii an arbitrary static, spherically symmetric space-time and show that the relativistic equations require a transition to a supersonic flow in the solution. The velocity, temperature and density profiles are obtained for the case of the polytropic equation of state. We apply the general formalism to the study of the accretion properties of several classes of braneworld black holes and we obtain the distribution of the main physical parameters of the gas. The astrophysical determination of these physical quantities could discriminate, at least in principle, between the different brane-world models and place some constraints on the existence of the extra dimensions.
Persistent Identifierhttp://hdl.handle.net/10722/91778
ISSN
2015 Impact Factor: 0.445
2015 SCImago Journal Rankings: 0.242

 

DC FieldValueLanguage
dc.contributor.authorHarko, Ten_HK
dc.date.accessioned2010-09-17T10:26:21Z-
dc.date.available2010-09-17T10:26:21Z-
dc.date.issued2009en_HK
dc.identifier.citationJournal of the Korean Physical Society, 2009, v. 54 n. 6 pt 1, p. 2583-2594en_HK
dc.identifier.issn0374-4884en_HK
dc.identifier.urihttp://hdl.handle.net/10722/91778-
dc.description.abstractThe brane-world description of our universe entails a large extra dimension and a fundamental scale of gravity that might be lower by several orders of magnitude compared to the Planck scale. An interesting consequence of the brane-world scenario is in the nature of spherically symmetric vacuum solutions to the brane gravitational field equations, with properties quite distinct as compared to the standard black-hole solutions of general relativity. We consider the spherically symmetric accretion of matter onto brane-worid black holes in terms of relativistic hydrodynamics by assuming that the inflowing gas obeys a polytropic equation of state. As a first step in this study, we consider the accretion process iii an arbitrary static, spherically symmetric space-time and show that the relativistic equations require a transition to a supersonic flow in the solution. The velocity, temperature and density profiles are obtained for the case of the polytropic equation of state. We apply the general formalism to the study of the accretion properties of several classes of braneworld black holes and we obtain the distribution of the main physical parameters of the gas. The astrophysical determination of these physical quantities could discriminate, at least in principle, between the different brane-world models and place some constraints on the existence of the extra dimensions.en_HK
dc.languageengen_HK
dc.publisherHan'guk Mulli Hakhoe. The Journal's web site is located at http://www.kps.or.kr/home/kor/journal/JKPS/default.asp?globalmenu=4&localmenu=11en_HK
dc.relation.ispartofJournal of the Korean Physical Societyen_HK
dc.subjectAccretionen_HK
dc.subjectBlack holesen_HK
dc.subjectBrane-world modelsen_HK
dc.titleMatter accretion by brane-world black holesen_HK
dc.typeArticleen_HK
dc.identifier.emailHarko, T: harko@hkucc.hku.hken_HK
dc.identifier.authorityHarko, T=rp01333en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-68649118356-
dc.identifier.hkuros169476-
dc.identifier.volume54en_HK
dc.identifier.issue6 pt 1en_HK
dc.identifier.spage2583en_HK
dc.identifier.epage2594en_HK

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