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Article: Thin accretion disks in f(R) modified gravity models

TitleThin accretion disks in f(R) modified gravity models
Authors
Issue Date2008
PublisherAmerican Physical Society. The Journal's web site is located at http://prd.aps.org
Citation
Physical Review D - Particles, Fields, Gravitation And Cosmology, 2008, v. 78 n. 2 How to Cite?
AbstractWe consider the basic physical properties of matter forming a thin accretion disc in the static and spherically symmetric space-time metric of the vacuum f(R) modified gravity models. The Lagrangian of the generalized gravity theory is also obtained in a parametric form, and the conditions of the viability of the model are also discussed. The exact Schwarzschild-type solution of the gravitational field equations in the f(R) gravity contains a linearly increasing term, as well as a logarithmic correction, as compared to the standard Schwarzschild solution of general relativity, and it depends on four arbitrary integration constants. The energy flux and the emission spectrum from the accretion disk around the f(R) gravity black holes are obtained, and they are compared to the general relativistic case. Particular signatures can appear in the electromagnetic spectrum, thus leading to the possibility of directly testing modified gravity models by using astrophysical observations of the emission spectra from accretion disks. © 2008 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/59640
ISSN
2014 Impact Factor: 4.643
2015 SCImago Journal Rankings: 1.882
ISI Accession Number ID
Funding AgencyGrant Number
RGC grant of the government of the Hong Kong SAR
Funding Information:

The work of T. H. is supported by an RGC grant of the government of the Hong Kong SAR. Z. K. is indebted to the colleagues in the Department of Physics of the University of Hong Kong for their support and warm hospitality during the preparation of this work.

References

 

DC FieldValueLanguage
dc.contributor.authorPun, CSJen_HK
dc.contributor.authorKovács, Zen_HK
dc.contributor.authorHarko, Ten_HK
dc.date.accessioned2010-05-31T03:54:19Z-
dc.date.available2010-05-31T03:54:19Z-
dc.date.issued2008en_HK
dc.identifier.citationPhysical Review D - Particles, Fields, Gravitation And Cosmology, 2008, v. 78 n. 2en_HK
dc.identifier.issn1550-7998en_HK
dc.identifier.urihttp://hdl.handle.net/10722/59640-
dc.description.abstractWe consider the basic physical properties of matter forming a thin accretion disc in the static and spherically symmetric space-time metric of the vacuum f(R) modified gravity models. The Lagrangian of the generalized gravity theory is also obtained in a parametric form, and the conditions of the viability of the model are also discussed. The exact Schwarzschild-type solution of the gravitational field equations in the f(R) gravity contains a linearly increasing term, as well as a logarithmic correction, as compared to the standard Schwarzschild solution of general relativity, and it depends on four arbitrary integration constants. The energy flux and the emission spectrum from the accretion disk around the f(R) gravity black holes are obtained, and they are compared to the general relativistic case. Particular signatures can appear in the electromagnetic spectrum, thus leading to the possibility of directly testing modified gravity models by using astrophysical observations of the emission spectra from accretion disks. © 2008 The American Physical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prd.aps.orgen_HK
dc.relation.ispartofPhysical Review D - Particles, Fields, Gravitation and Cosmologyen_HK
dc.rightsPhysical Review D (Particles and Fields). Copyright © American Physical Society.en_HK
dc.titleThin accretion disks in f(R) modified gravity modelsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0556-2821&volume=78&spage=024043: 1&epage=10&date=2008&atitle=Thin+accretion+disks+in+f(R)+modified+gravity+modelsen_HK
dc.identifier.emailPun, CSJ: jcspun@hkucc.hku.hken_HK
dc.identifier.emailHarko, T: harko@hkucc.hku.hken_HK
dc.identifier.authorityPun, CSJ=rp00772en_HK
dc.identifier.authorityHarko, T=rp01333en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevD.78.024043en_HK
dc.identifier.scopuseid_2-s2.0-48749125565en_HK
dc.identifier.hkuros149102en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-48749125565&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume78en_HK
dc.identifier.issue2en_HK
dc.identifier.isiWOS:000258636700096-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridPun, CSJ=7003931846en_HK
dc.identifier.scopusauthoridKovács, Z=36483148800en_HK
dc.identifier.scopusauthoridHarko, T=7006485783en_HK

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