KFU. Card publication. Boson dark matter halos with a dominant noncondensed component

KAZAN
FEDERAL UNIVERSITY

- RUS
- 中文
- ES

BOSON DARK MATTER HALOS WITH A DOMINANT NONCONDENSED COMPONENT

Form of presentation

Russian monographs

Year of publication

2022

Язык

английский

Authors, employees of KFU

Abdullin Iskander Gusmanovich, author

Popov Vladimir Aleksandrovich, author

Bibliographic description in the original language

Iskander G. Abdullin and Vladimir A. Popov JCAP11(2021)055

Annotation

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.

Keywords

Dark Matter, Astrophysics, Bose Einstein Condensation

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=262996&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Abdullin Iskander Gusmanovich	ru_RU
dc.contributor.author	Popov Vladimir Aleksandrovich	ru_RU
dc.date.accessioned	2022-01-01T00:00:00Z	ru_RU
dc.date.available	2022-01-01T00:00:00Z	ru_RU
dc.date.issued	2022	ru_RU
dc.identifier.citation	Iskander G. Abdullin and Vladimir A. Popov JCAP11(2021)055	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=262996&p_lang=2	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	Astrophysics	ru_RU
dc.subject	Bose Einstein Condensation	ru_RU
dc.title	Boson dark matter halos with a dominant noncondensed component	ru_RU
dc.type	Russian monographs	ru_RU