Gas, Iron, and Gravitational Mass in Galaxy Clusters: The General Lack of Cluster Evolution atz< 1.0

We have analyzed the ASCA data of 29 nearby clusters of galaxiessystematically, and obtained temperatures, iron abundances, and X-rayluminosities of their intracluster medium (ICM). We also estimate ICM massusing the beta model, and then evaluate iron mass contained in the ICM andderive the total gravitating mass. This gives the largest and most homogeneousinformation about the ICM derived only by the ASCA data. We compare thesevalues with those of distant clusters whose temperatures, abundances, andluminosities were also measured with ASCA, and find no clear evidence ofevolution for the clusters at z<1.0. Only the most distant cluster at z=1.0,AXJ2019.3+1127, has anomalously high iron abundance, but its iron mass in theICM may be among normal values for the other clusters, because the ICM mass maybe smaller than the other clusters. This may suggest a hint of evolution ofclusters at z ~ 1.0.Comment: 23 pages including 5 figures. Using PASJ2.sty, and PASJ95.sty. Accepted by PAS