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For refcode 1998MNRAS.297L..57A:
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Copyright by Royal Astronomical Society. 1998MNRAS.297L..57A The impact of cooling flows on the T_x_-L_Bol_; relation for the most luminous clusters S. W. Allen and A. C. Fabian Accepted 1998 April 23. Received 1998 March 6; in original form 1997 December 4 ABSTRACT We examine the effects of cooling flows on the T_x_-L_Bol_, relation for a sample of the most X-ray luminous (L_Bol_ > 10^45^ erg s^-1^) clusters of galaxies known. Using high-quality ASCA X-ray spectra and R0SAT images we explicitly account for the effects of cooling flows on the X-ray properties of the clusters and show that this reduces the previously noted dispersion in the T_x_-L_Bol_ relationship. More importantly, the slope of the relationship is flattened from L_Bol_ is proportional to T_x_^3^ to approximately L_Bol_ is proportional to T_x_^2^, in agreement with recent theoretical models which include the effects of shocks and pre-heating on the X-ray gas. We find no evidence for evolution in the T_x_-L_Bol_ relation within z ~ 0.3. Our results demonstrate that the effects of cooling flows must be accounted for before cosmological parameters can be determined from X-ray observations of clusters. The results presented here should provide a reliable basis for modelling the T_x_-L_Bol_ relation at high X-ray luminosities. Key words: galaxies: clusters: general - cooling flows - intergalactic medium - X-rays: galaxies.
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