Intermediate Element Abundances in Galaxy Clusters
  We present the abundances of the intermediate elements obtained by performing a stacked analysis of all the galaxy clusters in the archive of the X-ray telescope ASCA. We give the abundances of Fe, Si, S, and Ni as a function of cluster temperature from 1--10 keV, and place strong upper limits on the abundances of Ca and Ar. We show that the abundances of the most well-determined elements Fe, Si, and S in conjunction with recent theoretical supernovae yields do not give a consistent solution for the fraction of material produced by Type Ia and Type II supernovae at any single temperature. However, the general trend is for higher temperature clusters to have more of their metals produced in Type II supernovae than in Type Ias. 
Wayne H. Baumgartner (1 and 2), Donald J. Horner (3), Richard F.   Mushotzky (2) ((1) University of Maryland, (2) NASA / GSF...