SUMMARY OF SEQUENCE NUMBER 200068
SUMMARY OF SEQUENCE NUMBER 200068
Title: X-RAY IMAGING OF THE INTERACTING WINDS OF PLANETARY NEBULAE
Observer: KASTNER
Subject Category: Normal Stars and WD
Seq: 200068 ObsId: 00587
Long-term Plan bin: 21-Mar-2000
ABSTRACT
Certain planetary nebulae (PNe) are X-ray sources. Although this emission is generally ascribed to central stars, PNe also should display hot (> 10^6 K), diffuse X-ray emission, according to the "interacting winds" model of PN evolution. With the unprecedented combination of spatial and spectral resolution afforded by AXAF/ACIS we will, for the first time, distinguish unambiguously between diffuse, nebular X-ray emission and emission from the central star. We propose to observe 4 PNe that, based on previous ROSAT and ASCA results, are likely to display extended, high-temperature X-ray emission in ACIS images and spectra. These data will provide constraints on PN X-ray emission models and on the excitation of H_2 emission from PNe.
TARGET SUMMARY
| TARGET NAME |
RA | DEC |
TIME |
SI |
GRAT |
TYPE |
TC |
ROLL |
PRE |
PHASE |
MULTI |
PRI |
| BD+303639 |
293.688333 | 30.516417 |
20.00000 |
ACIS-S |
NONE |
GO |
no |
no |
no |
no |
no |
5 |
IMAGES
(NOTE: RASS images currently only available for targets LTS scheduled on or after Apr-09-2000)
PARAMETERS
Obscat Parameters
