SUMMARY OF PROPOSAL 41252
DR. KOUJUN YAMASHITA
NAGOYA UNIVERSITY
AICHI-KEN JAPAN 464-01
NAGOYA
FURO-CHO, CHIKUSA-KU

  E-mail: YAMASITA@SATIO.PHYS.NAGOYA-U.AC.JP	Tel: 81-52-789-3540	Fax: 81-52-789-2919
  Medium: 4GBDAT

Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS                      
  Title: DETERMINATION OF THE HUBBLE CONSTANT BY USING RESONANT SCATTERING EFFECT OF FE-K LINES IN AN INTRACLUSTER MEDIUM


Abstract:
 We propose a new method to derive the Hubble constant by making use of intensity
 decrement of Fe-K lines at the central core region caused by a resonant scattering
 effect in an intracluster medium. Two clusters A576(z=0.0381) and A1650(z=0.0845)
 are selected for this purpose under the conditions of high intensity, temperature,
 abundance and luminosity and large angular size fit well to GIS field of view. The
 finite optical depth of Fe-K lines is essential to derive the total amount of gas
 and result in obtaining the absolute cluster size. The data analysis of PV and AO3
 clusters indicates the usefulness of this method.

 Co-Is:
   1  HIDEYO KUNIEDA      	NAGOYA UNIV.                  JAPAN     
      (No Co-I contact data)
   2  YUZURU TAWARA       	NAGOYA UNIV.                  JAPAN     
   3  FUMIE AKIMOTO       	NAGOYA UNIV.                  JAPAN     
   4  MANABU WATANABE     	NAGOYA UNIV.                  JAPAN     
   5  AKIKO KUMADA        	NAGOYA UNIV.                  JAPAN     
   6  SHIGERU MIYOSHI     	KYOTO SANGYO UNIV.            JAPAN     


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
          
A1650                  1  194.7000   -1.7500    60   N   N   P  0.65000   1