The Earliest Production of Hot Gas in Young Planetary Nebulae
Abstract
Planetary nebulae (PNe) consist of stellar material ejected by stars with masses lower than 8-10 solar masses. Both fast stellar winds and collimated outflows contribute to the shaping of PN shells and fill the shell interiors with shock-heated gas at temperatures higher than 10E6 K. XMM- Newton and Chandra observations have produced the first unambiguous detections of diffuse X- ray emission from PNe, but the observed X-ray luminosities of PNe are generally much lower than theoretical expectations. Observations of a few young PNe hint at a short-lived phase of bright X- ray emission in early evolutionary stages. We request XMM-Newton observations of 4 very young PNe to further investigate the earliest history and physical conditions of hot gas produced by fast winds and collimated outflows in PNe.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2005
- Bibcode:
- 2005xmm..prop...95G
- Keywords:
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- Stars;
- White Dwarfs;
- Solar System;
- Hen 3-1357;
- XMM-Newton Proposal 04023801