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Article: Condensate dark matter stars

TitleCondensate dark matter stars
Authors
Keywordsdark energy theory
particle physics - cosmology connection
stars
Issue Date2012
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/JCAP
Citation
Journal Of Cosmology And Astroparticle Physics, 2012, v. 2012 n. 6 How to Cite?
AbstractWe investigate the structure and stability properties of compact astrophysical objects that may be formed from the Bose-Einstein condensation of dark matter. Once the critical temperature of a boson gas is less than the critical temperature, a Bose-Einstein Condensation process can always take place during the cosmic history of the universe. Therefore we model the dark matter inside the star as a Bose-Einstein condensate. In the condensate dark matter star model, the dark matter equation of state can be described by a polytropic equation of state, with polytropic index equal to one. We derive the basic general relativistic equations describing the equilibrium structure of the condensate dark matter star with spherically symmetric static geometry. The structure equations of the condensate dark matter stars are studied numerically. The critical mass and radius of the dark matter star are given by M crit 2(l a/1fm) 1/2(m χ/1GeV) -3/2M ȯ and R crit 1.1 × 10 6(l a/1fm) 1/2(m χ/1GeV) -3/2 cm respectively, where l a and m χ are the scattering length and the mass of dark matter particle, respectively. © 2012 IOP Publishing Ltd and Sissa Medialab srl.
Persistent Identifierhttp://hdl.handle.net/10722/152807
ISSN
2015 Impact Factor: 5.634
2015 SCImago Journal Rankings: 0.652
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLi, XYen_HK
dc.contributor.authorHarko, Ten_HK
dc.contributor.authorCheng, KSen_HK
dc.date.accessioned2012-07-16T09:49:10Z-
dc.date.available2012-07-16T09:49:10Z-
dc.date.issued2012en_HK
dc.identifier.citationJournal Of Cosmology And Astroparticle Physics, 2012, v. 2012 n. 6en_HK
dc.identifier.issn1475-7516en_HK
dc.identifier.urihttp://hdl.handle.net/10722/152807-
dc.description.abstractWe investigate the structure and stability properties of compact astrophysical objects that may be formed from the Bose-Einstein condensation of dark matter. Once the critical temperature of a boson gas is less than the critical temperature, a Bose-Einstein Condensation process can always take place during the cosmic history of the universe. Therefore we model the dark matter inside the star as a Bose-Einstein condensate. In the condensate dark matter star model, the dark matter equation of state can be described by a polytropic equation of state, with polytropic index equal to one. We derive the basic general relativistic equations describing the equilibrium structure of the condensate dark matter star with spherically symmetric static geometry. The structure equations of the condensate dark matter stars are studied numerically. The critical mass and radius of the dark matter star are given by M crit 2(l a/1fm) 1/2(m χ/1GeV) -3/2M ȯ and R crit 1.1 × 10 6(l a/1fm) 1/2(m χ/1GeV) -3/2 cm respectively, where l a and m χ are the scattering length and the mass of dark matter particle, respectively. © 2012 IOP Publishing Ltd and Sissa Medialab srl.en_HK
dc.languageengen_US
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/JCAPen_HK
dc.relation.ispartofJournal of Cosmology and Astroparticle Physicsen_HK
dc.rightsJournal of Cosmology and Astroparticle Physics. Copyright © Institute of Physics Publishing.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectdark energy theoryen_HK
dc.subjectparticle physics - cosmology connectionen_HK
dc.subjectstarsen_HK
dc.titleCondensate dark matter starsen_HK
dc.typeArticleen_HK
dc.identifier.emailHarko, T: harko@hkucc.hku.hken_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityHarko, T=rp01333en_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1088/1475-7516/2012/06/001en_HK
dc.identifier.scopuseid_2-s2.0-84863470401en_HK
dc.identifier.hkuros200928en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84863470401&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume2012en_HK
dc.identifier.issue6en_HK
dc.identifier.isiWOS:000306003500001-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLi, XY=55293652400en_HK
dc.identifier.scopusauthoridHarko, T=7006485783en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK

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