Wind-Wind Interactions and Stellar Magnetic Fields in Pre-Planetary Nebulae

Details Wind-Wind Interactions and Stellar Magnetic Fields in Pre-Planetary Nebulae Wind-Wind Interactions and Stellar Magnetic Fields in Pre-Planetary Nebulae

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cxo..prop.1395s&link_type=abstract

Chandra Proposal ID #05200638

Physics

Chandra Proposal Id #05200638

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. Our Cycle 3 discovery of nebular X-ray emission from the PPN Hen 3-1475 provides strong support for this conjecture, and important clues to the nature of the interaction. We propose to observe X-ray emission from 5 well-studied PPNs with very fast outflows using ACIS-S. These data will directly probe the very hot (10(7-8) K) shocked gas resulting from the interaction, and the presence of stellar magnetic fields which may be responsible for collimating the fast outflows.

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