SUMMARY OF PROPOSAL 63006
CE-SACLAY
L'ORMES DES MERISIERS, BAT. 709
GIF-SUR-YVETTE
FRANCE 91191
Tel: 33.1.69.08.43.84 Fax: 33.1.69.08.65.77
Medium: 4GBDAT
Subject: STARS
X-RAY EMISSION FROM THE TRIFID NEBULA
ABSTRACT
The Trifid Nebula is one of the best-studied astrophysical objects, a classical nebula of ionized gas from an O6V star, which glows red light with trisected obscuring dust lanes. Our ROSAT/PSPC image for the first time reveals that the Trifid Nebula emits X-rays and its emitting region has a diameter of 7 arcmin--as large as the HII region itself. We propose to perform an ASCA observation of the Trifid Nebula for 60 ks. The data will be used to (i) Determine if the emission is thermal, nonthermal, or multi-components, (ii) Search for compact sources (e.g. the O star, HD 164492) of hard X-ray emission, and its time variability due to the ejecta material from steller winds, and (iii) Understand the X-ray emitting mechanism of the diffuse emission in HII regions.
CO-INVESTIGATORS
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)TRIFID | 2 | 270.5975 | -23.0306 | 60 ks | N | Y | P | 0.10000 | 1 |