Enrichment and heating of the intracluster medium by ejection from galaxies

Details Enrichment and heating of the intracluster medium by ejection from galaxies Enrichment and heating of the intracluster medium by ejection from galaxies

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993egte.conf..111m&link_type=abstract

In NASA. Ames Research Center, The Evolution of Galaxies and Their Environment p 111-112 (SEE N93-26706 10-90)

Physics

Computerized Simulation, Galactic Clusters, Galactic Evolution, Hydrodynamics, Intergalactic Media, Many Body Problem, Emission Spectra, Enrichment, Heating, Heavy Elements, Plasmas (Physics), X Ray Sources

Scientific paper

Results of N-body + hydrodynamic simulations designed to model the formation and evolution of clusters of galaxies and intracluster gas are presented. Clusters of galaxies are the largest bound, relaxed objects in the universe. They are strong x-ray emitters; this radiation originates through thermal bremsstrahlung from a diffuse plasma filling the space between cluster galaxies, the intracluster medium or ICM. From observations, one can infer that the mass of the ICM is comparable to or greater than the mass of all the galaxies in the cluster, and that the ratio of mass in hot gas to mass in galaxies, M(sub ICM)/M(sub STARS), increases with the richness of the cluster. Spectroscopic studies of cluster x-ray emission show heavy element emission lines. While M(sub ICM)/M(sub STARS) is greater than or equal to 1 implies that most of the ICM is primordial in nature, the discovery of heavy elements indicates that some of the gas must have been processed through galaxies. Galaxy evolution thus directly impacts cluster evolution.

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