Fumie Akimoto, A. Furuzawa, Y. Tawara and K. Yamashita

Abstract

The spectral analyses of iron K-lines were carried out in the central core and outer envelope regions for over 100 clusters of galaxies observed with ASCA. All of their line intensity ratios; R1 = IKa / (IKb + INi Ka) a nd R2 = IHe-like Ka/IH-like Ka are not con sistent with a thin hot plasma model. The discrepancy would be caused by the reduction of He-like iron Ka intensity, by the higher contribution of nickel Ka to iron Kb or by the multi-temperature components. The preferable interpretation is the first one, maybe due to the resonance scattering.