Evolving Dust Chemistry in Post-AGB Stars
Abstract
Intermediate-mass stars form dense and dynamic circumstellar envelopes at the end of their stellar lives. These envelopes can be dramatically asymmetric, with dusty waist formations and wind-blown polar cavities. Several IR spectral features are predicted to evolve as the post-AGB phase unfolds, many of which can be used as tracers of circumstellar structure. I will present recent investigations of this phenomenon using 5-40 micron spectra from Spitzer's Infrared Spectrograph (IRS).
- Publication:
-
American Astronomical Society Meeting Abstracts #218
- Pub Date:
- May 2011
- Bibcode:
- 2011AAS...21840704H