SUMMARY OF PROPOSAL 61173

MR KAZUHIRO D NAKAZAWA
KAZU@MIRANDA.PHYS.S.U-TOKYO.AC.JP

UNIVERSITY OF TOKYO
TOKYO JAPAN 113
BUNKYO-KU
7-3-1 HONGO
Tel: 03-3812-2111 EX.4173 Fax: 03-3812-6938
Medium: 4GBDAT
Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS

OBSERVATION OF DARK CLUSTER CANDIDATE RXJ1833.6+6520


ABSTRACT

"Dark Cluster" is a kind of objects which has few galaxies in it. Shortage of Galaxies sould lead to very low metal abundance in IGM plasma. Discovery of distant "dark cluster" AXJ2019+1127 with ASCA, however, arises a big mystery because it has extremely high metal abundance. Is there any object like this? A nearby diffuse X-ray object RXJ1833.6+6520 seems to have seldom galaxies in it. So we propose this object as a candidate for nearby "dark cluster" to be observed with ASCA. ASCA will be able to detect its metal abundance and other propoty, and will show us the nature of this object.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
KAZUO MAKISHIMAUNIVERSITY OF TOKYOJAPAN
YASUSHI FUKAZAWAUNIVERSITY OF TOKYOJAPAN
TAKAYUKI TAMURAUNIVERSITY OF TOKYOJAPAN
YASUSHI IKEBEMPEGERMANY

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)RXJ1833.6+6520
1
278.4187 65.3467 80 ksN
Y
P
0.01100
1