PI: Krzysztof Findeisen, Caltech, firstname.lastname@example.org
Address: Department of Astronomy, MC 249-17, 1200 East California Blvd, Pasadena, CA 91125
CoI: Lynne Hillenbrand, Caltech
Title: Variability and the Physics of Young Stars
Abstract: Variability is potentially a powerful probe of several million year old stars, constraining such varied physics as stellar activity, dust disk geometry, and accretion dynamics. So far, only periodic variability, related to stellar activity and rotation, has received significant attention. We are carrying out a large-scale systematic survey of periodic, aperiodic, and episodic variability in the North America Nebula region. With this survey, we will be able to construct a complete membership list based on variability, infrared, and spectroscopic properties, determine the rotation period distribution and compare it to that in other star-forming environments, determine the distribution of timescales associated with variable accretion, and determine the distribution of spatial scales associated with inhomogeneous circumstellar dust. Here we propose a multi-band photometric monitoring campaign targeting the North America Nebula. The new observations will extend our survey to cover rapid (few hours to few days) flux changes, and will provide color information essential to a thorough understanding of the physics underlying young stellar variability.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360