Cool Gas in Clusters of Galaxies

Details Cool Gas in Clusters of Galaxies Cool Gas in Clusters of Galaxies

2003-07-31

arxiv.org/abs/astro-ph/0308006v1

2003 Carnegie Observatory Astrophysics Series, Vol 3: Clusters of Galaxies: Probes of Cosmological Structure and Galaxy Evolut

Astronomy and Astrophysics

Astrophysics

Scientific paper

Early X-ray observations suggested that the intracluster medium cools and condenses at the centers of clusters, leading to a cooling flow of plasma in the cluster core. The increased incidence of emission-line nebulosity, excess blue light, AGN activity, and molecular gas in the cores of clusters with short central cooling times seemed to support this idea. However, high-resolution spectroscopic observations from XMM-Newton and Chandra have conclusively ruled out simple, steady cooling flow models. We review the history of this subject, the current status of X-ray observations, and some recent models that have been proposed to explain why the core gas does not simply cool and condense.

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