Signature of the interaction between dark energy and dark matter in observations

Autor:	Abdalla, Elcio, Abramo, L. Raul, de Souza, Jose C. C.
Rok vydání:	2009
Předmět:	General Relativity and Quantum Cosmology Astrophysics - Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory
Zdroj:	Phys.Rev.D82:023508,2010
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.82.023508
Popis:	We investigate the effect of an interaction between dark energy and dark matter upon the dynamics of galaxy clusters. This effect is computed through the Layser-Irvine equation, which describes how an astrophysical system reaches virial equilibrium and was modified to include the dark interactions. Using observational data from almost 100 purportedly relaxed galaxy clusters we put constraints on the strength of the couplings in the dark sector. We compare our results with those from other observations and find that a positive (in the sense of energy flow from dark energy to dark matter) non vanishing interaction is consistent with the data within several standard deviations. Comment: 13 pages, 3 figures; matches PRD published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0910.5236 Zobrazit plný text záznamu View this record from Arxiv