Investigating Colliding Winds and Magnetised Stars in Pre-Planetary Nebulae

Details Investigating Colliding Winds and Magnetised Stars in Pre-Planetary Nebulae Investigating Colliding Winds and Magnetised Stars in Pre-Planetary Nebulae

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1152s&link_type=abstract

Chandra Proposal ID #04200729

Physics

Chandra Proposal Id #04200729

Scientific paper

Preplanetary nebulae (PPNs) - the progenitors of planetary nebulae (PNs) - hold the key to our understanding of the very late stages of stellar evolution. Recent HST studies show that the fast wind-slow wind interaction process believed to produce diffuse X-ray emission from PNs, must already be active in PPNs. Sensitive observations for X-ray emission in PPNs, however, do not exist. We propose ACIS-S observations of 4 well-studied PPNs with very fast outflows in order to directly probe (a) the very hot (10(7-8) K) shocked gas which must result from the interaction, and (b) the presence of strong stellar magnetic fields which may be responsible for collimating the fast outflows. These data will be invaluable in testing theoretical models of X-ray emission in PPNs and PNs.

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