NOAO >   Observing Info >   Approved Programs >   2011B-0214

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Proposal Information for 2011B-0214


PI: John R. Stauffer, Caltech, stauffer@ipac.caltech.edu
Address: IPAC, 1200 E California Blvd, Pasadena, Ca. 91125, USA

CoI: Maria Morales-Calderon, IPAC/Caltech
CoI: Luisa M. Rebull, IPAC/Caltech
CoI: John Carpenter, Caltech
CoI: Lee Hartmann, University of Michigan

Title: Using Multiwavelength, time series photometry to Deduce the Physical Processes Causing Variability in Young Stellar Objects

Abstract: We propose to monitor the NGC2264 star-forming region over a 10 night period with Flamingos at a time when simultaneous and continuous data will be obtained with both the CoRoT and Spitzer space telescopes. Via other proposals, we are also requesting time series photometry at U- band for the entire 30 day period, and a 300 ksec Chandra x-ray pointing. This program represents the longest monitoring campaign ever performed on a star-forming region (30 days for CoRoT and Spitzer), with unprecedented photometric accuracy (down to 0.1 mmag), and the first ever to simultaneously cover such a wide wavelength range. Flamingos is an important part of the program because J-band data are thought to provide the best measure of the photospheric flux for classical T Tauri stars (minimally affected by ``veiling'' or disk emission), while K-band data are sensitive to hot dust near the inner disk edge. The near-IR data are also important for determining the dependence of extinction on wavelength, and hence constraining the dust grain size distribution. The combined data set will allow us to identify the underlying physical processes responsible for YSO variability (non-steady accretion, spot modulation, disk occultation, flares, etc.).


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