ICM masses in nearby and distant clusters of galaxies

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We compile X-ray data of clusters of galaxies at a wide range of redshift z=0.0 1.0 and compare X-ray luminosities, gas masses, iron abundances and iron masses of nearby clusters and those of distant clusters as a function of plasma temperature. All the date presented in this paper have been obtained only with and/or. No evidence for a change in the -relationship or - iron abundance at z<0.6 is found. No significant change in - relationship at z>0.6 is seen, either. However, the gas masses of very distant clusters at z 0.8-1.0 and some clusters around z 0.6 are significantly lower than those of nearby clusters, which indicates a hint of evolution. The iron masses of the two very distant clusters at z 0.8-1.0 are significantly different from each other, which suggests that the epoch of the metal injection into ICM is different from cluster to cluster.