Infrared Spectroscopy of Late Stage Post-AGB Stars

Details Infrared Spectroscopy of Late Stage Post-AGB Stars Infrared Spectroscopy of Late Stage Post-AGB Stars

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21713001h&link_type=abstract

American Astronomical Society, AAS Meeting #217, #130.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

During their pilgrimage towards Planetary Nebulae (PNe), dust-enshrouded post-AGB stars undergo a structural and perhaps chemical transformation. Many potentially responsible shaping mechanisms have been proposed, including an axisymmetric super wind, several types of binary interactions and magnetic confinement. During this critical phase, the central star is typically obscured at optical wavelengths; infrared emission from the circumstellar envelope provides a window into the processes occurring in the interior region. I present spectra (from Spitzer's IRS and MMIRS on the Magellan Clay Telescope) of a sample of late post-AGB stars designed to bracket the transition from post-AGB to PN. These data reveal important clues about conditions in the circumstellar environment during this enigmatic phase.

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