SUMMARY OF PROPOSAL 71187
KUMAMOTO GAKUEN UNIVERSITY
2-5-1, OE
KUMAMOTO
KUMAMOTO JAPAN 862
Tel: 096-364-5161 EXT.1544 Fax: 096-372-0702
Medium: 4GBDAT
Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS
AN X-RAY OBSERVATION OF HCG 15: SPATIAL DISTRIBUTION OF MASS IN A "LOOSE" HICKSON COMPACT GROUP
ABSTRACT
HCG 15 is one of the loosest group among Hickson xompact groups (HCGs). A HCG can be regarded as one stage in dynamical evolution of initially more extended system. According to this idea, a looser HCG has less evolved and its mass should show less concentration towrd the group center while a denser one has more evolved and strong mass concentration toward the group center should realize. Thus, it is expected that the spatial mass distribution in a HCG which is obtained by X-ray observation of hot intragroup gas can be used as an indicator of stages of dynamical evolution of HCGs. However, unfortunately, actual spatial distribution of mass in a loose HCG is little known at present. With this motivation, we propose a 100 ksec ASCA SIS observation of HCG 15.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| YUZURU TAWARA | NAGOYA UNIVERSITY | JAPAN |
| SHINJI SATO | NAGOYA UNIVERSITY | JAPAN |
| AKIHIRO FURUZAWA | NAGOYA UNIVERSITY | JAPAN |
| FUMIE AKIMOTO | NAGOYA UNIVERSITY | JAPAN |
| MANABU WATANABE | NAGOYA UNIVERSITY | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)HCG 15 | C | 31.9079 | 2.1533 | 50 ks | N | Y | P | 0.01400 | 1 |