The multiphase nature of the intra-cluster medium of some clusters of galaxies

Abstract

The discovery of EUV and soft X-ray excess emission in clusters of galaxies (the cluster soft-excess phenomenon) challenged the notion of the hot ($\sim 10^{7-8}$ K) gas as the only dominant thermal component of the intracluster medium (ICM). The spatial analysis of ROSAT PSPC 1/4 keV images presented here reveals compelling evidence for substantial amounts of cold gas (HI) in the ICM of the Coma and Virgo clusters. This finding bolsters the original interpretation of the soft excess as emission from a `warm' ($\sim 10^6$ K) gas and points to the scenario of a multiphase ICM where the hot component co-exists with gases at sub-Virial temperatures (the `warm' and `cold' phases).

ApJ accepted

References in corpus (3)

• VLA HI imaging of the brightest spiral galaxies in Coma
• The properties of cooling flows in X-ray luminous clusters of galaxies
• Re-observing the EUV emission from Abell 2199: in-situ measurement of background distribution by offset pointing

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