SUMMARY OF PROPOSAL 61171
UNIVERSITY OF TOKYO
TOKYO JAPAN 113
BUNKYO-KU
7-3-1 HONGO
Tel: 03-3812-2111 EX.4202 Fax: 03-3815-8875
Medium: 4GBDAT
Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS
SEARCH FOR DIFFUSE X-RAY EMITTING GAS IN X-RAY FAINT GROUP OF GALAXIES : RGH101
ABSTRACT
ROSAT and ASCA observations found that groups of galaxires often contain large amount of X-ray hot gas, but their X-ray luminosities scatter widely in the range of 10e41-43 erg/s in spite of similar gas temperature. It is possible that groups of galaxies with low gas density are X-ray dark even if they contain as large amount of hot gas as X-ray bright groups. We propose to observe X-ray dark group of galaxy RGH101, in order to search very faint diffuse X-ray emission. If it is detected, it is suggested that most groups contain large amount of hot gas.
CO-INVESTIGATORS
CO-I NAME | INSTITUTE | COUNTRY |
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KAZUHIRO NAKAZAWA | UNIV. OF TOKYO | JAPAN |
XU HAIGUANG | UNIV. OF TOKYO | JAPAN |
HAJIME EZAWA | UNIV. OF TOKYO | JAPAN |
TAKAYUKI TAMURA | UNIV. OF TOKYO | JAPAN |
KAZUO MAKISHIMA | UNIV. OF TOKYO | JAPAN |
TAKAYA OHASHI | TOKYO METRO UNIV. | JAPAN |
TARGETS
TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
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1)RGH101 | 3 | 217.2396 | 30.9109 | 40 ks | N | N | P | 0.01000 | 1 |