Cooling flows and the entropy of the intragroup medium

Details Cooling flows and the entropy of the intragroup medium Cooling flows and the entropy of the intragroup medium

2002-10-18

arxiv.org/abs/astro-ph/0210410v2

Mon.Not.Roy.Astron.Soc. 339 (2003) 721

Astronomy and Astrophysics

Astrophysics

LaTeX with mn.sty, 7 figures, Accepted to MNRAS for publication (25th October). Replaced by the final version with minor chang

Scientific paper

10.1046/j.1365-8711.2003.06214.x

We study steady, homogeneous and subsonic cooling flows in poor clusters of galaxies in light of the recent proposal that radiative cooling of the intracluster gas can explain the observations of the `entropy floor' and other related X-ray observations. We study a family of cooling flow solutions parameterized by the mass flux rate, and then determine the resulting entropy and the X-ray luminosity. We find that cooling flows with mass flux rates in excess of 1000 M_{solar} per yr are required to explain the observations of entropy and X-ray luminosity. In view of the observed lack of such large flows in rich clusters, our calculations suggest that heating sources are needed, in addition to the effect of radiative cooling, to explain the observations.

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