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Dark energy and key physical parameters of clusters of galaxiesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Bisnovatyi-Kogan G.S., Chernin A.D.
- Журнал: Astrophysics and Space Science
- Том: 338
- Номер: 1
- Год издания: 2012
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 337
- Последняя страница: 344
- DOI: 10.1007/s10509-011-0936-y
- Аннотация: We study physics of clusters of galaxies embedded in the cosmic dark energy background. Under the assumption that dark energy is described by the cosmological constant, we show that the dynamical effects of dark energy are strong in clusters like the Virgo cluster. Specifically, the key physical parameters of the dark mater halos in clusters are determined by dark energy: (1) the halo cut-off radius is practically, if not exactly, equal to the zero-gravity radius at which the dark matter gravity is balanced by the dark energy antigravity; (2) the halo averaged density is equal to two densities of dark energy; (3) the halo edge (cut-off) density is the dark energy density with a numerical factor of the unity order slightly depending on the halo profile. The cluster gravitational potential well in which the particles of the dark halo (as well as galaxies and intracluster plasma) move is strongly affected by dark energy: the maximum of the potential is located at the zero-gravity radius of the cluster.
- Добавил в систему: Чернин Артур Давидович