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   61183
   The hot-gas structure and temprature variation in the southern region
   of the Virgo Cluster will be mapped. We look for an evidence of shock
   front caused by the infall of M49 subcluster into M87 cluster. Virgo is
   the only cluster which enables us a close-up look of the heating front
   with the ASCA's angular resolution. Since the gas and darkmatter should
   act differently during a dynamical motion, the mass structure in the
   infalling M49 subcluster will give us new knowledge on the darkmatter
   properties. The large scale distribution of temperature and abundance
   in the Virgo will tell us origin and history of the hot gas in this
   complex system.
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