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Article: Can stellar mass black holes be quark stars?

TitleCan stellar mass black holes be quark stars?
Authors
KeywordsAccretion, accretion discs
Black hole physics
Dense matter
Equation of state
Relativity
Issue Date2009
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/MNR
Citation
Monthly Notices Of The Royal Astronomical Society, 2009, v. 400 n. 3, p. 1632-1642 How to Cite?
AbstractWe investigate the possibility that stellar mass black holes, with masses in the range of 3.8- 6 M ⊙, respectively, could be in fact quark stars in the colour-flavour-locked (CFL) phase. Depending on the value of the gap parameter, rapidly rotating CFL quark stars can achieve much higher masses than standard neutron stars, thus making them possible stellar mass black hole candidates. Moreover, quark stars have a very low luminosity and a completely absorbing surface - the infalling matter on the surface of the quark star is converted into quark matter. A possibility of distinguishing CFL quark stars from stellar mass black holes could be through the study of thin accretion discs around rapidly rotating quark stars and Kerr-type black holes, respectively. Furthermore, we show that the radiation properties of accretion discs around black holes and CFL quark stars are also very similar. However, strange stars exhibit a low-luminosity but high-temperature bremsstrahlung spectrum, which, in combination with the emission properties of the accretion disc, may be the key signature to differentiate massive strange stars from the black hole. © 2009 RAS.
Persistent Identifierhttp://hdl.handle.net/10722/91839
ISSN
2015 Impact Factor: 4.952
2015 SCImago Journal Rankings: 2.806
ISI Accession Number ID
Funding AgencyGrant Number
Hong Kong SARHKU 7013/06P
702507P
Funding Information:

We would like to thank the anonymous referee for comments and suggestions that helped us to significantly improve the manuscript. KSC is supported by the GRF grant number HKU 7013/06P of the government of the Hong Kong SAR. The work of TH is supported by the GRF grant no. 702507P of the Government of the Hong Kong SAR. ZK is indebted to the colleagues in the Department of Physics and Center for Theoretical and Computational Physics of the University of Hong Kong for their support and warm hospitality.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorKovács, Zen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorHarko, Ten_HK
dc.date.accessioned2010-09-17T10:28:07Z-
dc.date.available2010-09-17T10:28:07Z-
dc.date.issued2009en_HK
dc.identifier.citationMonthly Notices Of The Royal Astronomical Society, 2009, v. 400 n. 3, p. 1632-1642en_HK
dc.identifier.issn0035-8711en_HK
dc.identifier.urihttp://hdl.handle.net/10722/91839-
dc.description.abstractWe investigate the possibility that stellar mass black holes, with masses in the range of 3.8- 6 M ⊙, respectively, could be in fact quark stars in the colour-flavour-locked (CFL) phase. Depending on the value of the gap parameter, rapidly rotating CFL quark stars can achieve much higher masses than standard neutron stars, thus making them possible stellar mass black hole candidates. Moreover, quark stars have a very low luminosity and a completely absorbing surface - the infalling matter on the surface of the quark star is converted into quark matter. A possibility of distinguishing CFL quark stars from stellar mass black holes could be through the study of thin accretion discs around rapidly rotating quark stars and Kerr-type black holes, respectively. Furthermore, we show that the radiation properties of accretion discs around black holes and CFL quark stars are also very similar. However, strange stars exhibit a low-luminosity but high-temperature bremsstrahlung spectrum, which, in combination with the emission properties of the accretion disc, may be the key signature to differentiate massive strange stars from the black hole. © 2009 RAS.en_HK
dc.languageengen_HK
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/MNRen_HK
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen_HK
dc.rightsThe definitive version is available at www3.interscience.wiley.com-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectAccretion, accretion discsen_HK
dc.subjectBlack hole physicsen_HK
dc.subjectDense matteren_HK
dc.subjectEquation of stateen_HK
dc.subjectRelativityen_HK
dc.titleCan stellar mass black holes be quark stars?en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0035-8711&volume=400&issue=3&spage=1632&epage=1642&date=2009&atitle=Can+stellar+mass+black+holes+be+quark+stars?-
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.emailHarko, T: harko@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.identifier.authorityHarko, T=rp01333en_HK
dc.description.naturepostprinten_US
dc.identifier.doi10.1111/j.1365-2966.2009.15571.xen_HK
dc.identifier.scopuseid_2-s2.0-71849104872en_HK
dc.identifier.hkuros168769-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-71849104872&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume400en_HK
dc.identifier.issue3en_HK
dc.identifier.spage1632en_HK
dc.identifier.epage1642en_HK
dc.identifier.isiWOS:000272344700042-
dc.publisher.placeUnited Kingdomen_HK
dc.relation.projectRelativistic collapse of neutron stars: gravitational radiation and gamma-ray emission-
dc.identifier.scopusauthoridKovács, Z=36483148800en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridHarko, T=7006485783en_HK

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