SUMMARY OF PROPOSAL 42181
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: X-RAY SPECTRA OF CLUSTER COOLING FLOWS: SPECTRAL EVIDENCE FOR COOLING AND COLD GAS


Abstract:
 We propose ASCA spectra for six X-ray clusters of galaxies with cooling flows. The
 primary aim is to determine the physical state and ultimate repository of the gas
 cooling in these systems. We will use emission line diagnostics to derive the amount
 and spatial distribution of the cooling material, and the density structure of
 inhomogeneities. Previous Einstein or ROSAT spectra of these clusters show evidence
 for excess X-ray absorption. The presence of this excess soft X-ray absorption will
 be verified, and we will determine if it is intrinsic to the cluster or in the
 foreground. The spatial distribution of this cold material will be derived. We will
 also determine overall cluster properties, such as the gas temperature and density
 profiles and the amount and distribution of dark matter.

 Co-Is:
   1  MICHAEL WISE        	MIT                           USA       
      WISE@SPACE.MIT.EDU	617-258-7254
   2  MAXIM MARKEVITCH    	UNIV. VIRGINIA                USA       
   3  ZHENPING HUANG      	UNIV. VIRGINIA                USA       


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
A2052                  0  229.1850    7.0222    40   N   N   P  2.00600   1