SUMMARY OF PROPOSAL 43042
DR IAN M. MCHARDY
UNIVERSITY OF SOUTHAMPTON
HAMPSHIRE UK SO17 1BJ
SOUTHAMPTON
HIGHFIELD

  E-mail: IMH@PHASTR.SOTON.AC.UK	Tel: (01703) 592101	Fax: (01703) 593910
  Medium: 2GBDAT

Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS                      
  Title: DETERMINATION OF THE HUBBLE CONSTANT                                            


Abstract:
 As the microwave background (MWB) photons travel towards us through rich clusters of
 galaxies, they are scattered to higher energies by the hot gas in the clusters. The
 resulting spectral distortion is called the Sunyaev-Zeldovich (SZ) effect. The
 cosmological importance of the SZ effect is that, when coupled with an X-ray
 determination of the temperature and density profile of the hot scattering gas, it
 is possible to directly deduce the scale size of the universe, ie the Hubble constant. El

 Co-Is:
   1  ANDREW NEWSAM       	UNI. SOUTHAMPTON              UK        
      AMN@PHASTR.SOTON.AC.UK	(01703) 593918
   2  TREVOR PONMAN       	UNI. BIRMINGHAM               UK        
   3  DAMIAN CARTER       	UNI. BIRMINGHAM               UK        
   4  WALTER GEAR         	ROE                           UK        
   5  MICHAEL MERRIFIELD  	UNI. SOUTHAMPTON              UK        


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
ABELL 1553             1  187.7083   10.5739    40   N   N   P  0.32000   1 
          
ABELL 990              1  155.8750   49.1631    40   N   N   P  0.49000   1