Dynamical Evolution of Clusters of Galaxies

Details Dynamical Evolution of Clusters of Galaxies Dynamical Evolution of Clusters of Galaxies

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxac..17...33p&link_type=abstract

Galaxy Evolution: Theory & Observations (Eds. Vladimir Avila-Reese, Claudio Firmani, Carlos S. Frenk & Christine Allen) Revista

Astronomy and Astrophysics

Astronomy

Cosmology, Galaxies: Clusters

Scientific paper

Evidence is presented for a recent evolution of the relaxation processes in clusters of galaxies. The criteria of the cluster relaxation used are the cluster ellipticity, the ICM temperature and X-ray cluster luminosity. We find evidence of all three indicators evolving with redshift for z ≲ 0.15. This result supports the view that clusters have mostly stopped undergoing mergers and accreting matter, as expected in a low- Omega_{{m}}() Universe, and are now in the process of gravitational relaxation, which reduces their flattening, their ICM temperature (shock heated during the merging phase), and their X-ray luminosity.

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