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Article: Thin accretion discs around neutron and quark stars

TitleThin accretion discs around neutron and quark stars
Authors
KeywordsAccretion, accretion disks
Dense matter
Gravitation
Stars: Equation of state
Stars: Rotation
Starts: Neutron
Issue Date2009
PublisherE D P Sciences. The Journal's web site is located at http://www.aanda.org
Citation
Astronomy And Astrophysics, 2009, v. 500 n. 2, p. 621-631 How to Cite?
AbstractThe possibility of observationally discriminating between various types of neutron stars, described by different equations of state of the nuclear matter, as well as differentiating neutron stars from other types of exotic objects, for example, quark stars, is one of the fundamental problems in contemporary astrophysics. We consider and investigate carefully the possibility that different types of rapidly rotating neutron stars, as well as other type of compact general-relativistic objects, can be identified reliably by the study of the emission properties of the accretion, discs around them. We obtain the energy flux, temperature distribution, and emission spectrum from, the accretion discs around several classes of rapidly rotating neutron stars, described by different equations of state for neutron matter, and for quark stars, described, by the MIT bag model equation of state, and in the CFL (Color-Flavor-Locked) phase, respectively. Particular signatures appear in the electromagnetic spectrum, implying that the equation, of state of the dense matter can. be tested directly by using astrophysical observations of the emission spectra from accretion discs. © ESO 2009.
Persistent Identifierhttp://hdl.handle.net/10722/59589
ISSN
2014 Impact Factor: 4.378
2015 SCImago Journal Rankings: 2.446
ISI Accession Number ID
Funding AgencyGrant Number
Government of the Hong Kong SARHKU 7013/06P
HKU 702507
Funding Information:

We would like to thank to the anonymous referee for suggestions and comments that helped us to significantly improve the manuscript. Z.K. 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. K. S. C. is supported by the GRF grant number HKU 7013/06P of the government of the Hong Kong SAR. The work of T.H. is supported by the GRF grant number HKU 702507 of the Government of the Hong Kong SAR.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorKovács, Zen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorHarko, Ten_HK
dc.date.accessioned2010-05-31T03:53:22Z-
dc.date.available2010-05-31T03:53:22Z-
dc.date.issued2009en_HK
dc.identifier.citationAstronomy And Astrophysics, 2009, v. 500 n. 2, p. 621-631en_HK
dc.identifier.issn0004-6361en_HK
dc.identifier.urihttp://hdl.handle.net/10722/59589-
dc.description.abstractThe possibility of observationally discriminating between various types of neutron stars, described by different equations of state of the nuclear matter, as well as differentiating neutron stars from other types of exotic objects, for example, quark stars, is one of the fundamental problems in contemporary astrophysics. We consider and investigate carefully the possibility that different types of rapidly rotating neutron stars, as well as other type of compact general-relativistic objects, can be identified reliably by the study of the emission properties of the accretion, discs around them. We obtain the energy flux, temperature distribution, and emission spectrum from, the accretion discs around several classes of rapidly rotating neutron stars, described by different equations of state for neutron matter, and for quark stars, described, by the MIT bag model equation of state, and in the CFL (Color-Flavor-Locked) phase, respectively. Particular signatures appear in the electromagnetic spectrum, implying that the equation, of state of the dense matter can. be tested directly by using astrophysical observations of the emission spectra from accretion discs. © ESO 2009.en_HK
dc.languageengen_HK
dc.publisherE D P Sciences. The Journal's web site is located at http://www.aanda.orgen_HK
dc.relation.ispartofAstronomy and Astrophysicsen_HK
dc.rightsThe original publication is available at www.springerlink.com-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectAccretion, accretion disksen_HK
dc.subjectDense matteren_HK
dc.subjectGravitationen_HK
dc.subjectStars: Equation of stateen_HK
dc.subjectStars: Rotationen_HK
dc.subjectStarts: Neutronen_HK
dc.titleThin accretion discs around neutron and quark starsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-6361&volume=500&issue=2&spage=621&epage=631&date=2009&atitle=Thin+accretion+discs+around+neutron+and+quark+starsen_HK
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.naturepostprint-
dc.identifier.doi10.1051/0004-6361/200811412en_HK
dc.identifier.scopuseid_2-s2.0-67649497998en_HK
dc.identifier.hkuros163430en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-67649497998&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume500en_HK
dc.identifier.issue2en_HK
dc.identifier.spage621en_HK
dc.identifier.epage631en_HK
dc.identifier.isiWOS:000267363100012-
dc.publisher.placeFranceen_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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