Computer Science
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40030f&link_type=abstract
Spitzer Proposal ID #40030
Computer Science
Scientific paper
Planetary systems are currently believed to form within a circumstellar debris disk. Previous studies have identified over a hundred such debris disks around A, F, and G-type dwarfs from their thermal IR emission. However, very little is known about debris disks around M dwarfs, as only two debris disk systems around M dwarfs have been confirmed. Even though they are the most populous stars in our solar neighborhood, M dwarfs are often overlooked because of instrumental sensitivity; these low-mass stars have low luminosities and temperatures. But, if forming planetary systems exist around these stars, they would be the most numerous and represent a population worth examining. We propose to use the extraordinary sensitvity provided by MIPS on Spitzer to search for debris disks around a sample of nine young (~100Myr), nearby M dwarfs. The exposure times have been chosen to measure the photosphere from 3-70um. Based on current estimates of disk fractions, we should discover 1-2 debris disks, which will almost double the number of disks known around low-mass stars. Since M dwarfs are most likely the most common host of planetary systems, comparing their debris disks to those around higher mass stars will shed light on the diversity of planetary architectures. Divisions: There is 0.6 hour total using IRAC, and 16.4 hrs total using MIPS.
Ardila David
Fazio Giovanni
Lowrance Patrick
Marengo Massimo
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