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Article: Bose-Einstein condensation of dark matter solves the core/cusp problem

TitleBose-Einstein condensation of dark matter solves the core/cusp problem
Authors
KeywordsDark matter theory
Rotation curves of galaxies
Issue Date2011
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, 2011, v. 5, article no. 22 How to Cite?
AbstractWe analyze the observed properties of dwarf galaxies, which are dark matter dominated astrophysical objects, by assuming that dark matter is in the form of a strongly-coupled, dilute Bose-Einstein condensate. The basic astrophysical properties of the condensate (density profile, rotational velocity, and mass profile, respectively), are derived from a variational principle. To test the validity of the model we compare first the tangential velocity equation of the model with a sample of eight rotation curves of dwarf galaxies. We find a good agreement between the theoretically predicted rotation curves (without any baryonic component) and the observational data. The mean value of the logarithmic inner slope of the mass density profile of dwarf galaxies is also obtained, and it is shown that the observed value of this parameter is in agreement with the theoretical results. The predictions of the Bose-Einstein condensate model are also systematically compared with the predictions of the standard Cold Dark Matter model. The non-singular density profiles of the Bose-Einstein condensed dark matter generally show the presence of an extended core, whose presence is due to the strong interaction between dark matter particles. © 2011 IOP Publishing Ltd and SISSA.
Persistent Identifierhttp://hdl.handle.net/10722/139630
ISSN
2015 Impact Factor: 5.634
2015 SCImago Journal Rankings: 0.652
ISI Accession Number ID
Funding AgencyGrant Number
government of the Hong Kong SAR
Funding Information:

I would like to thank to the anonymous referee for comments and suggestion that helped me to significantly improve the manuscript. This work was supported by a GRF grant of the government of the Hong Kong SAR.

 

DC FieldValueLanguage
dc.contributor.authorHarko, Ten_US
dc.date.accessioned2011-09-23T05:52:46Z-
dc.date.available2011-09-23T05:52:46Z-
dc.date.issued2011en_US
dc.identifier.citationJournal of Cosmology and Astroparticle Physics, 2011, v. 5, article no. 22en_US
dc.identifier.issn1475-7516-
dc.identifier.urihttp://hdl.handle.net/10722/139630-
dc.description.abstractWe analyze the observed properties of dwarf galaxies, which are dark matter dominated astrophysical objects, by assuming that dark matter is in the form of a strongly-coupled, dilute Bose-Einstein condensate. The basic astrophysical properties of the condensate (density profile, rotational velocity, and mass profile, respectively), are derived from a variational principle. To test the validity of the model we compare first the tangential velocity equation of the model with a sample of eight rotation curves of dwarf galaxies. We find a good agreement between the theoretically predicted rotation curves (without any baryonic component) and the observational data. The mean value of the logarithmic inner slope of the mass density profile of dwarf galaxies is also obtained, and it is shown that the observed value of this parameter is in agreement with the theoretical results. The predictions of the Bose-Einstein condensate model are also systematically compared with the predictions of the standard Cold Dark Matter model. The non-singular density profiles of the Bose-Einstein condensed dark matter generally show the presence of an extended core, whose presence is due to the strong interaction between dark matter particles. © 2011 IOP Publishing Ltd and SISSA.-
dc.languageengen_US
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/JCAPen_US
dc.relation.ispartofJournal of Cosmology and Astroparticle Physicsen_US
dc.rightsJournal of Cosmology and Astroparticle Physics. Copyright © Institute of Physics Publishing.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectDark matter theory-
dc.subjectRotation curves of galaxies-
dc.titleBose-Einstein condensation of dark matter solves the core/cusp problemen_US
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1475-7516&volume=5, article no. 22&spage=&epage=&date=2011&atitle=Bose-Einstein+condensation+of+dark+matter+solves+the+core/cusp+problem-
dc.identifier.emailHarko, T: harko@hkucc.hku.hken_US
dc.identifier.authorityHarko, TC=rp01333en_US
dc.description.naturepostprint-
dc.identifier.doi10.1088/1475-7516/2011/05/022-
dc.identifier.scopuseid_2-s2.0-79957935260-
dc.identifier.hkuros195375en_US
dc.identifier.volume5, article no. 22en_US
dc.identifier.isiWOS:000291264100022-
dc.identifier.citeulike10777574-

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