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   81804
   This is the final run of the Virgo cluster mapping project with ASCA.
   We propose the observations of edge regions of the Virgo cluster to
   look for the evidence of shocks caused by the infall of subclusters
   into M87 subcluster. Since the gas and darkmatter should act
   differently during a dynamical motion, the mass structure in the
   infalling subclusters will give us new knowledge on the darkmatter
   properties. With this mapping observation, we will almost complete the
   full X-ray map of the Virgo cluster. Detailed comparison of X-ray and
   optical structures will tell us how the Virgo cluster has evolved and
   acquired the present complex morphology.
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