SUMMARY OF PROPOSAL 71012
THE INSTITUTE OF PHYSICAL AND CHEMICAL RESEARCH (RIKEN)
2-1 HIROSAWA
WAKO
SAITAMA JAPAN 351-0198
Tel: +81-48-462-1111 EXT.3226 Fax: +81-48-462-4640
Medium: 4GBDAT
Subject: STARS
X-RAY OBSERVATION OF A PLANETARY NEBULA
ABSTRACT
To investigate the chemical evolution of the universe is one of the most important subjects in X-ray astronomy. The results of the ASCA observations of clusters of galaxies, galaxies, and supernova remnants are inconsistent with the standard model of the chemical evolution of the universe. However, the connection on the chemical evolution between stars and interstellar space are not yet revealed. Therefore we propose X-ray observation of a planetary nebula, NGC7293, where metals diffuse into interstellar space from a normal star.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| TAKESHI TSURU | KYOTO UNIVERSITY | JAPAN |
| SHIRO UENO | LEICESTER UNIVERSITY | UK |
| KATSUJI KOYAMA | KYOTO UNIVERSITY | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)NGC7293 | C | 337.4100 | -20.8383 | 50 ks | N | Y | P | 0.00240 | 1 |