NOAO >   Observing Info >   Approved Programs >   2012A-0212

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Proposal Information for 2012A-0212


PI: Fabienne Bastien, Vanderbilt University, fabienne.a.bastien@vanderbilt.edu
Address: Physics Department, 6301 Stevenson Center, Nashville, TN 37235, United States

CoI: Joshua Pepper, Vanderbilt University
CoI: Keivan Stassun, Vanderbilt University
CoI: Lucianne Walkowicz, Princeton University
CoI: Gibor Basri, University of California at Berkeley

Title: Identifying Photometric and Chromospheric Activity Correlations of Kepler Stars

Abstract: The recent public release of lightcurves from the Kepler mission provides the first opportunity for investigating the intrinsic photometric variability of large numbers of stars. Since most such variability is believed to be due to starspots related to magnetic activity, we intend to test that hypothesis by obtaining chromospheric observations of stellar activity with Ca II H and K emission for select Kepler stars. We will compare overall photometric variability with R^'_HK for all stars, and test whether the magnitude of the variability or its periodicity correlates with stellar activity for a range of spectral types. This analysis will inform theories of stellar evolution and activity, improve the efficiency of planet detection around active stars, and constrain theories of planet formation and disk dispersal. This project was previously awarded time, most of it lost to poor weather. We request time to complete the project and to extend it to include other types of stars, thereby allowing us to derive and calibrate age-activity relations and permitting the determination of stellar ages from chromospheric activity.


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 >   2012A-0212

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