ASCA observations of the temperature structure and metal distribution in the Perseus cluster of galaxies

Large-scale distributions of hot-gas temperature and Fe abundance in the Pe rseus cluster have been studied with multi-pointing observations by the GIS instrument onboard ASCA. Within a radius of 20 ' from the cluster center, the energy spectra requires two temperature components. in which the cool c omponent indicates kT similar to 2 keV and the hot-component temperature sh ows a significant decline from about 8 keV to 6 keV toward the center. In t he outer region of the cluster, the temperature shows a fluctuation with an amplitude of about 2 keV. which suggest that a western region at similar t o 16 ' from the cluster center is relatively hotter. As for the Fe abundanc e, a significant decline with radius is detected from 0.44 solar at the cen ter to similar to 0.1 solar at a 50 ' offset region. If the observed Fe-K l ine intensity within 4 ' from the center is suppressed by a factor of 2 due to the resonance scattering effect, the corrected Fe mass density follows the galaxy distribution. Finally, our results do not support the large-scal e velocity gradients previously reported from the same GIS data.