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The Impact of Cooling Flows in Clusters of Galaxies

Published online by Cambridge University Press:  25 May 2016

S. W. Allen
S. W. Allen*
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CBS OHA, U.K.

Abstract

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I discuss the impact of cooling flows on the observable X-ray properties of clusters of galaxies. I show that accounting for the effects of cooling flows and subcluster merger events leads to consistent determinations of the distribution of gravitating matter in clusters from X-ray and gravitational lensing studies. Accounting for the effects of cooling flows significantly reduces the scatter in the LBol/TX relation determined for the hottest, most luminous systems and changes the best-fitting slope of the relation to a value close to LBol ∝ T2X, in agreement with theoretical models. A clear segregation between the mean metallicities of cooling-flow and non-cooling-flow clusters is observed, which can be explained by the presence of metallicity gradients in the cooling-flow systems.

Type
Part I: Talks
Information
Symposium - International Astronomical Union , Volume 195: Highly Energetic Physical Processes and Mechanisms , 2000 , pp. 199 - 206
Copyright
Copyright © Astronomical Society of the Pacific 2000 

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