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Boson dark matter halos with a dominant noncondensed component

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dc.contributor.author Abdullin I.G.
dc.contributor.author Popov V.A.
dc.date.accessioned 2022-02-09T20:44:57Z
dc.date.available 2022-02-09T20:44:57Z
dc.date.issued 2021
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/170009
dc.description.abstract We consider galaxy halos formed by dark matter bosons with mass in the range of about a few tens or hundreds eV. A major part of the particles is in a noncondensed state and described under the Thomas-Fermi approach. Derived equations are solved numerically to find the halo density profile. The noncondensed state is supported in the entire halo except compact gravitationally bounded Bose-Einstein condensates. Although the size of these compact objects, also known as Bose stars, depends on interactions between the particles, its upper limit is only about 100 astronomical units. The Bose stars collect the condensed bosons providing a density cusp avoidance in the halo as well as a natural mechanism to prevent overproduction of small halos. Clusters of the Bose stars can also contribute to the halo density profile. The model is analyzed by confronting its predictions with observations of galaxy rotation curves. We employ 22 low surface brightness galaxies and obtain that the model is consistent with the observational data when the particle mass is in the range above about 50 eV and the best fit corresponds to the mass m = 86 eV. This mass is appropriate for relic dark matter bosons, which decouple just after QCD phase transition.
dc.subject dark matter theory
dc.subject rotation curves of galaxies
dc.title Boson dark matter halos with a dominant noncondensed component
dc.type Article
dc.relation.ispartofseries-issue 11
dc.relation.ispartofseries-volume 2021
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS-2021-2021-11-SID85120714848


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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