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On the Inner Structure of Virialized Clusters

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Abstract

In the present paper, we studied the correlations among different quantities in the clusters of galaxies observed by Newman et al. We found an anti-correlation among the slope α, the effective radius, Re, and a correlation among the core radius rcore and Re. Moreover, the mass in 100 kpc (mainly dark matter) is correlated with the mass inside 5 kpc (mainly baryons). The previous correlations can be understood in a two phase formation model: a first dissipative phase forming the proto-BCG and a second dissipationless phase, in which the inner density profile is flattened by the interaction of baryonic clumps and the DMhalo through dynamical friction (DF).

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  1. Dipartimento di Fisica e Astronomia, Università di Catania, Catania, Italy

    A. Del Popolo

  2. Institute of Modern Physics, Chinese Academy of Sciences, Beijing, People’s Republic of China

    A. Del Popolo & Xiguo Lee

  3. INFN Sezione di Catania, Catania, Italy

    A. Del Popolo

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Del Popolo, A., Lee, X. On the Inner Structure of Virialized Clusters. Astron. Rep. 63, 249–262 (2019). https://doi.org/10.1134/S1063772919040024

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