NOAO >   Observing Info >   Approved Programs >   2011B-0052

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Proposal Information for 2011B-0052


PI: Andrzej Baran, Iowa State University, andysbaran@gmail.com
Address: Department of Physics and Astronomy, 12 Physics Hall, Ames, IA 50011, United States

CoI: Jerzy Krzesinski, Cracow Pedagogical University

Title: Mt.Suhora survey - searching for pulsating 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 40 min. To confirm our theoretical predictions we plan to observe at least 100 dwarfs of early M type (70 already done). Time series photometry obtained on each star will be analyzed by means of Fourier transform and Phase Dispersion Minimization. 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. So far, eight new variable field stars have been found.


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NOAO >   Observing Info >   Approved Programs >   2011B-0052

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