SUMMARY OF PROPOSAL 71185

DR. TAKESHI GO TSURU
TSURU@CR.SCPHYS.KYOTO-U.AC.JP

KYOTO
KITASHIRAKAWA
KYOTO
KYOTO JAPAN 606-01
Tel: (81)-75-753-3843 Fax: (81)-75-753-3799
Medium: 2.5GB8MM
Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS

DOES CLUSTER OF GALAXIES EVOLVE AROUND Z


ABSTRACT

Very distant clusters AXJ2019+1127 and MS1054-0321, at the redshift larger than 0.6 observed by ASCA and ROSAT show remarkable different characteristics from nearby clusters. The two clusters contain only 1/5 - 1/2 of ICM of nearby clusters with same plasma temperature. X-ray spectrum of AXJ2019+1127 exhibits strong iron line whose abundance reaches 1.7 cosmic values although MS1054-0321 indicate only upper limit. On the other hand, clusters at 0.10.6. However, only two clusters at z>0.6 have been observed with ASCA. Therefore, we propose observation of a distant cluster in order to investigate possible cluster evolution at z>0.6.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
HIRONORI MATSUMOTORIKENJAPAN

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)PDCS01
A
 7.2625 5.0233
100 ks
N
Y
P
0.00422
1