SUMMARY OF PROPOSAL 42179
DR. CRAIG L. SARAZIN
UNIVERSITY OF VIRGINIA
VIRGINIA USA 22903-0818
CHARLOTTESVILLE
P.O. BOX 3818

  E-mail: CLS7I@VIRGINIA.EDU	Tel: 804-924-4903	Fax: 804-924-3104
  Medium: 5GB8MM

Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS                      
  Title: MAPPING THE TEMPERATURE STRUCTURE OF ALMOST RELAXED CLUSTERS                    


Abstract:
 We propose observations of 4 bright Coma-like clusters, A2065, A2255, A2420 and
 A1650, whose X-ray images suggest that they are in a non-fully relaxed dynamical
 state. We expect to see significant X-ray temperature variations in these clusters,
 as predicted by several recent numerical simulations and, in fact, observed by ASCA
 in some nearby clusters. We will also measure the temperature at large off-center
 distances, where a sharp temperature decline is observed by ASCA in several other
 clusters. The gas temperature structure is a clue for the models of cluster
 formation and has important cosmological implications. The proposed clusters have
 redshifts between 0.07-0.085, and are sufficiently bright and small to fit within the useful ASCA FOV to facilitate these measurements.

 Co-Is:
   1  MAXIM MARKEVITCH    	U. VIRGINIA                   USA       
      MLM5Y@VIRGINIA.EDU	804-924-4891


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
A2065                  0  230.6250   27.7080    50   N   N   P  1.10000   2 

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