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Article: Evolution of cosmological perturbations in Bose-Einstein condensate dark matter

TitleEvolution of cosmological perturbations in Bose-Einstein condensate dark matter
Authors
KeywordsCosmology: theory
Dark matter
Equation of state
Instabilities
Large-scale structure of universe
Issue Date2011
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, 2011, v. 413 n. 4, p. 3095-3104 How to Cite?
AbstractWe consider the global cosmological evolution and the evolution of the density contrast in the Bose–Einstein condensate dark matter model, in the framework of a post-Newtonian cosmological approach. In the Bose–Einstein model, dark matter can be described as a non-relativistic, Newtonian gravitational condensate, whose density and pressure are related by a barotropic equation of state. For a condensate with quartic non-linearity, the equation of state is polytropic with index n= 1.The basic equation describing the evolution of the perturbations of the Bose–Einstein condensate is obtained, and its solution is studied by using both analytical and numerical methods. The global cosmological evolution as well as the evolution of the perturbations of the condensate dark matter shows significant differences with respect to the pressureless dark matter model, considered in the framework of standard cosmology. Therefore, the presence of condensate dark matter could have modified drastically the cosmological evolution of the early universe as well as the large-scale structure formation process. © 2011 The Author Monthly Notices of the Royal Astronomical Society © 2011 RAS.
Persistent Identifierhttp://hdl.handle.net/10722/142485
ISSN
2015 Impact Factor: 4.952
2015 SCImago Journal Rankings: 2.806
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong Kong Special Administrative Region, China
Funding Information:

I would like to thank to the anonymous referee for comments and suggestions that helped me to considerably improve the manuscript. The work described in this paper was fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China.

 

DC FieldValueLanguage
dc.contributor.authorHarko, TCen_US
dc.date.accessioned2011-10-28T02:46:54Z-
dc.date.available2011-10-28T02:46:54Z-
dc.date.issued2011en_US
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2011, v. 413 n. 4, p. 3095-3104en_US
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10722/142485-
dc.description.abstractWe consider the global cosmological evolution and the evolution of the density contrast in the Bose–Einstein condensate dark matter model, in the framework of a post-Newtonian cosmological approach. In the Bose–Einstein model, dark matter can be described as a non-relativistic, Newtonian gravitational condensate, whose density and pressure are related by a barotropic equation of state. For a condensate with quartic non-linearity, the equation of state is polytropic with index n= 1.The basic equation describing the evolution of the perturbations of the Bose–Einstein condensate is obtained, and its solution is studied by using both analytical and numerical methods. The global cosmological evolution as well as the evolution of the perturbations of the condensate dark matter shows significant differences with respect to the pressureless dark matter model, considered in the framework of standard cosmology. Therefore, the presence of condensate dark matter could have modified drastically the cosmological evolution of the early universe as well as the large-scale structure formation process. © 2011 The Author Monthly Notices of the Royal Astronomical Society © 2011 RAS.-
dc.languageengen_US
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/MNR-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen_US
dc.rightsThe definitive version is available at www.blackwell-synergy.com-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectCosmology: theory-
dc.subjectDark matter-
dc.subjectEquation of state-
dc.subjectInstabilities-
dc.subjectLarge-scale structure of universe-
dc.titleEvolution of cosmological perturbations in Bose-Einstein condensate dark matteren_US
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0035-8711&volume=413&issue=4&spage=3095&epage=3104&date=2011&atitle=Evolution+of+cosmological+perturbations+in+Bose-Einstein+condensate+dark+matter-
dc.identifier.emailHarko, TC: harko@hkucc.hku.hken_US
dc.identifier.authorityHarko, TC=rp01333en_US
dc.description.naturepostprint-
dc.identifier.doi10.1111/j.1365-2966.2011.18386.x-
dc.identifier.scopuseid_2-s2.0-79956191510-
dc.identifier.hkuros196863en_US
dc.identifier.volume413en_US
dc.identifier.issue4-
dc.identifier.spage3095en_US
dc.identifier.epage3104en_US
dc.identifier.isiWOS:000290819900067-
dc.identifier.citeulike9356906-

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