NOAO >   Observing Info >   Approved Programs >   2005B-0529

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Proposal Information for 2005B-0529


PI: Keivan G. Stassun, Vanderbilt University, keivan.stassun@vanderbilt.edu
Address: Physics Department, VU Station B 1807, Nashville, TN 37235, USA

CoI: Cesar Briceno, Centro de Investigaciones de Astronomia

Title: A Photometric Study of Stellar Rotation and Discovery of Eclipsing Binaries in Orion's Belt

Abstract: We will photometrically monitor a region covering 6 square degrees in which a large number of T Tauri stars have recently been identified in the course of our large-scale variability survey of the Orion OB1 association. These fields span two sub-associations with ages 3-10 Myr (Ori OB 1a and 1b), a critical age range to test pre-main-sequence evolutionary models and to investigate a key stage in the angular momentum evolution of low-mass stars. Specifically, we will obtain high-cadence light curves which we will use to measure rotation periods for these stars. Because these regions have recently been observed with \it Spitzer, we will be able to combine IR signatures of circumstellar disk with our rotation-period measurements to shed new light on the much debated connection between rotation and disks in young low-mass stars. We will also use these time- series data to identify candidate eclipsing binary stars for follow-up investigations leading to accurate, empirical mass determinations of young stars.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2005B-0529

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