Einstein Observatory Solid State Detector Observations of Cooling Flows in Clusters of Galaxies

Abstract

We present SSS observations of cooling flows in 9 clusters of galaxies chosen to have cooling flows based on Einstein Observatory imaging results. We analyze the data with three models, 1) the addition of a cool to a hot component, 2) a power law distribution of emission measure with temperature and 3) a cooling flow model. We find strong evidence for the existence of cool components in the centers of these clusters. The derived distribution of emission measure versus. temperature for M87 agrees very well with that derived from the Einstein Observatory Focal Plane Crystal Spectrometer. Values of the cooling rate, Ṁ, derived from the SSS data (in this paper, we will always quote values of Ṁ in solar masses per year and use a Hubble constant of 50 km/sec/Mpc) agree very well with those derived from analysis of the Einstein Observatory IPC and HRI data (K. Amaud, this workshop). This agreement is not fortuitous since the methods of analysis and the free parameters involved are totally different. We feel that the agreement between the three Einstein Observatory experiments is good and gives weight to the the numerical values of Ṁ for the larger sample of objects observed only with the Einstein Observatory IPC and HRI.