SUMMARY OF PROPOSAL 61221
MIYAZAKI UNIVERSITY
MIYAZAKI JAPAN 889-21
MIYAZAKI
1-1 GAKUEN-KIBANADAI-NISHI
Tel: 0985-58-2867 Fax: 0985-55-3058
Medium: 4GBDAT
Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS
ASCA OBSERVATIONS OF GALAXY GROUPS IN THE ROSAT SURVAY
ABSTRACT
ASCA has observed several groups of galaxies and detect unusually low metal abundances in their intergalactic gas, however, the most of the ASCA samples are selected from the Hickson's compact groups, which have abnormally high galactic density. To obtain the properties of normal galaxy groups, we propose to observe X-ray selected groups in the ROSAT North Ecliptic Pole Survey. The goals of the observations are to obtain fundamental parameters, gas mass, gravitational mass, temperature, and abundances, to investigate the dynamical and chemical evolution of groups.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| HITOSHI HANAMI | IWATE UNIV. | JAPAN |
| NOBUO ARIMOTO | UNIV. TOKYO | JAPAN |
| KAZUHIRO SHIMASAKU | UNIV. TOKYO | JAPAN |
| YUTAKA FUJITA | KYOTO UNIV. | JAPAN |
| HIDEYUKI MATSUZAWA | MIYAZAKI KANGO UNIV. | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)RXJ1736.4+6804 | 2 | 264.1154 | 68.0753 | 40 ks | N | N | P | 0.10000 | 1 |
| 2)RXJ1756.5+6512 | 2 | 269.1313 | 65.2158 | 40 ks | N | N | P | 0.05000 | 1 |