SUMMARY OF PROPOSAL 51245
NAGOYA UNIVERSITY
AICHI-KEN JAPAN 464-01
NAGOYA
FURO-CHO, CHIKUSA-KU
Tel: 81-52-789-3540 Fax: 81-52-789-2919
Medium: 2.5GB8MM
Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS
OBSERVATION OF THE DISTANT GALAXY CLUSTER CL0107+31(Z
ABSTRACT
The observation of very distant clusters(z>0.6) is a very powerful tool to constrain cosmological models, since different models predict very different number of massive clusters at high redshift. However the number of distant clusters for which spectroscopic X-ray measurements exist, and thus reliable mass estimate can be done, is still very small. We propose an very distant cluster, CL0107+31(z=0.69), for which we have detailed optical and infrared observations. This cluster have also or will be observed with ROSAT. Using the spectroscopic capabilities of ASCA, we will be able to measure the temperature and assess the total mass.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| YUZURU TAWARA | NAGOYA UNIV. | JAPAN |
| AKIHIRO FURUZAWA | NAGOYA UNIV. | JAPAN |
| FUMIE AKIMOTO | NAGOYA UNIV. | JAPAN |
| MONIQUE ARNAUD | CE SACLAY | FRANCE |
| PAOLA BELLONI | LMU | GERMANY |
| DORIS NEUMANN | MPE | GERMANY |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)CL0107+31 | 1 | 17.5750 | 31.7889 | 100 ks | N | Y | P | 0.01800 | 1 |