КФУ. Карточка публикации. Boson dark matter halos with a dominant noncondensed component

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BOSON DARK MATTER HALOS WITH A DOMINANT NONCONDENSED COMPONENT

Форма представления

Статьи в зарубежных журналах и сборниках

Год публикации

2021

Язык

английский

Авторы, сотрудники КФУ

Попов Владимир Александрович, автор

Авторы, аспиранты КФУ

Абдуллин Искандер Гусманович, автор

Библиографическое описание на языке оригинала

I.G. Abdullin and V.A. Popov, Boson dark matter halos with a dominant noncondensed component. JCAP11(2021)055

Аннотация

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.

Ключевые слова

dark matter, Bose--Einstein condensate, light boson, axion-like particle, galaxy structure, rotation curve

Название журнала

Journal of Cosmology and Astroparticle Physics

URL

https://iopscience.iop.org/article/10.1088/1475-7516/2021/11/055

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https://repository.kpfu.ru/?p_id=260489

Полная запись метаданных

Поле DC	Значение	Язык
dc.contributor.author	Попов Владимир Александрович	ru_RU
dc.contributor.author	Абдуллин Искандер Гусманович	ru_RU
dc.date.accessioned	2021-01-01T00:00:00Z	ru_RU
dc.date.available	2021-01-01T00:00:00Z	ru_RU
dc.date.issued	2021	ru_RU
dc.identifier.citation	I.G. Abdullin and V.A. Popov, Boson dark matter halos with a dominant noncondensed component. JCAP11(2021)055	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/?p_id=260489	ru_RU
dc.description.abstract	Journal of Cosmology and Astroparticle Physics	ru_RU
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.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	dark matter	ru_RU
dc.subject	Bose--Einstein condensate	ru_RU
dc.subject	light boson	ru_RU
dc.subject	axion-like particle	ru_RU
dc.subject	galaxy structure	ru_RU
dc.subject	rotation curve	ru_RU
dc.title	Boson dark matter halos with a dominant noncondensed component	ru_RU
dc.type	Статьи в зарубежных журналах и сборниках	ru_RU