Physics
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20280r&link_type=abstract
Spitzer Proposal ID #20280
Physics
Scientific paper
Long before the canonical debris disk Beta Pictoris was known to be a young planetary system harboring evaporating and colliding planetesimals (a debris disk), it had been classified as a shell star. This peculiar class consists of stars with narrow absorption lines in their spectra, which are thought to arise from circumstellar gas. In the last several years, some of the main sequence shell stars have turned out to have protoplanetary or debris disks. The fraction of main sequence shell stars which are actually young disk systems is not known, but appears to be at least 22%. We propose a MIPS photometric survey of main sequence shell stars to determine the disk fraction. These observations will look for IR excess emission associated with circumstellar dust disks. If we find that there are young disk systems still hiding among the main sequence shell stars, this project will dramatically expand a rare and valuable set of disks where the gas and dust may be studied together. This will allow the first statistically significant examination of the co-evolution of gas and dust throughout the planet formation phase.
Roberge Aki
Weinberger Alycia J.
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