NOAO >   Observing Info >   Approved Programs >   2010B-0400

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Proposal Information for 2010B-0400


PI: Riley Smith, Iowa State University, rileys@iastate.edu
Address: Department of Physics and Astronomy, 12 Physics Hall, Ames, IA 50011, United States

CoI: Andrzej Baran, Iowa State University
CoI: Steve Kawaler, Iowa State University

Title: Testing new theoretical models of M dwarfs

Abstract: The primary aim of the observations is the search for and analysis of stellar pulsations in M dwarfs, the dominant stellar population in our Galaxy, in order to test and improve theoretical models of low mass stellar structure and evolution. Our theoretical models of early type M dwarfs show that these stars can pulsate. Expected periods of oscillations depends on stellar parameters and focus around 30 min. To confirm our theoretical predictions we plan to observe at least 100 dwarfs of early M type (30 already done). Time series photometry obtained on each star will be analyzed by means of Fourier transform. In case of positive verification of our hypothesis, this analysis provides us with frequency and amplitudes of oscillation modes and we can put observational constraints on our models. The project will also be able to detect eclipsing binaries, extrasolar planets around these stars, and other types of variability.


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 >   2010B-0400

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