NOAO >   Observing Info >   Approved Programs >   2010B-0521

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Proposal Information for 2010B-0521


PI: Michael Reed, Missouri State University, mreed@sdbv.missouristate.edu
Address: Physics Department, 901 S. National, Springfield, MO 65897, USA

CoI: Simon O'Toole, Anglo-Australian Telescope
CoI: Amanda Quint, Missouri State University

Title: Constraining compact binary stars from the Kepler field.

Abstract: The Kepler mission is obtaining stellar photometry of unprecedented precision. One goal of the mission is to discern the interior structure of stars via their pulsations. For compact pulsating stars, with periods of a few minutes to a few hours, Kepler is revealing tens of periodicities with a richness unobtainable from ground-based observations. It is also finding many of these objects are in binary systems. The telescope obtains photometry in one broad-band filter only however, so is unfortunately not optimal for discerning the stars' binary properties. Binarity is an important means to determine the mass and size of stars, independent of their pulsation. These Kepler targets are therefore important for two reasons: first, they provide an independent way of finding stellar masses, which can be compared with asteroseismic results; and second, understanding them will provide insight into the evolutionary history of compact binary stars, in this case, the subdwarf B stars. We will also obtain accurate effective temperatures and surface gravities, parameters which are vital for asteroseismic modeling.


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