Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000iaus..195..199a&link_type=abstract
Highly Energetic Physical Processes and Mechanisms for Emission from Astrophysical Plasmas, Proceedings of IAU Symposium #195, h
Astronomy and Astrophysics
Astrophysics
Scientific paper
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 ~TX2, 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.
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