Using kinetic theory to examine a self-gravitating system composed of baryons and cold dark matter

Autor:	Gilberto M. Kremer, Martín G. Richarte, Elberth M. Schiefer
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Zdroj:	European Physical Journal C: Particles and Fields, Vol 79, Iss 6, Pp 1-11 (2019)
Druh dokumentu:	article
ISSN:	1434-6044 1434-6052
DOI:	10.1140/epjc/s10052-019-6965-3
Popis:	Abstract We examine the evolution of non-relativistic cold dark matter gravitationally coupled to baryons with modes deep inside the Hubble radius (sub-horizon regime) using a kinetic theory approach within the realm of Newtonian theory. We obtain the general solution for the total density perturbation and we also show that a baryon perturbation catches up with the dark matter perturbation at late times, which in turn makes possible the formation of bound structures. We extend the linear perturbation analysis by considering the turn-around event, collapse of matter, and its virialization process.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/18a9fbf9732b411996b8217847b2a012 Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF Plný text ve formátu HTML
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