Correlations in Relaxed Clusters of Galaxies

Baltic astronomy

article

Iu. Babyk¹  A. Del Popolo⁴ 

[1] Main Astronomical Observatory, NAS of Ukraine;Dublin Institute for Advanced Studies;Dublin City University;Dipartimento di Fisica e Astronomia;International Institute of Physics, Universidade Federal do Rio Grande do Norte

关键词: cosmology theory;    large-scale structure of Universe;    dark matter;    galaxies clusters;    formation;   

DOI  :  10.1515/astro-2017-0169

来源: Institute of Theoretical Physics and Astronomy

【 摘 要 】

The correlations among different quantities in galaxy clusters, observed by Newman et al. (2013a,b), are investigated. We find an anti-correlation among the slope α , the effective radius, R e , and a correlation among the core radius r core and R e. Moreover, the mass inside 100 kpc (mainly dark matter) is correlated with the mass inside 5 kpc (mainly baryons). The listed correlations can be understood in a two phase formation model: the first dissipative phase forming the brightest cluster galaxies, and the second dissipationless phase, in which the inner density profile is flattened by the interaction of baryonic clumps and the dark matter halo through dynamical friction.

【 授权许可】

Unknown