Probing planetary system formation with Spitzer: Debris disks around early F stars

Details Probing planetary system formation with Spitzer: Debris disks around early F stars Probing planetary system formation with Spitzer: Debris disks around early F stars

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30211r&link_type=abstract

Spitzer Proposal ID #30211

Physics

Scientific paper

We propose to study 50 early F stars with a mean age around 3 Gyr at both 24 and 70 microns to measure the fraction of these stars that possess debris disks. This experiment will bridge the gap between debris disk results for A stars and Sun-like stars, and between young and old samples. Our observations are designed to detect the photosphere of each star with S/N > 3 and will therefore rigorously determine the presence or absence of excesses that suggest debris disks. There are three possibilities that can explain the presently observed data for A and Sun-like stars, and each predicts a different result for a population of 3 Gyr early F stars. Identifying which possibility best fits the observed early F star excess rate will help us to understand the dominant physical mechanism that governs the frequency of debris disks and planet formation.

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