A1367 -- A Cluster in Formation

Abell 1367 is an Xray bright, nearby cluster containing an unusual set of smallarc minute size clumps. Of the 16 clumps detected in Einstein and ROSATobservations, only 9 are associated with galaxies. Recent numerical simulationssuggest that dense dark halos, formed at early epochs, can survive the clustertidal field and halohalo interactions. Perhaps the observed clumps are relicsof these dense halos. We propose a 30ksec XMM observation that will cover thecentral region of the cluster and provide sufficient data to (1) accuratelymeasure the spectra of individual clumps, (2) provide an accurate temperaturemap of the cluster on scales as small as 1 arc minute, and (3) for the brighterclumps, provide a spatially resolved temperature profile that will be used to truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]