Computer Science
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010sptz.prop70025s&link_type=abstract
Spitzer Proposal ID #70025
Computer Science
Scientific paper
We have identified a well-populated class of young stellar objects (YSOs) in the Orion Nebula cluster whose light curves show narrow (few day timescale) flux dips. Based on comparison to the only previously well-documented member of this class (AA Tau), we believe these flux dips are due to 'clouds' in the inner circumstellar disk of these stars that pass through our line of sight. Our 2009 data suggest that most YSO disks have similar structures and that those which exhibit these flux dips are simply those whose disks are close to edge-on to our line of sight. We propose here to obtain IRAC time series data of much higher cadence and significantly better RMS noise for twelve members of this class over a 10 day timespan. These data will allow us to constrain better the size distribution of the occulting bodies, their grain properties and their internal density structure. These data will therefore provide quantitative inputs to realistic models of circumstellar disk evolution and planet formation/migration.
Barrado David
Bouvier Jerome
Brown Tim
Carey Sean
Carpenter John
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