NOAO >   Observing Info >   Approved Programs >   2010B-0340

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Proposal Information for 2010B-0340


PI: Alexander Brown, University of Colorado, Alexander.Brown@colorado.edu
Address: Center for Astrophysics and Space Astronomy (CASA), 593 UCB, Boulder, CO 80309-0593, USA

CoI: Lucianne Walkowicz, University of California - Berkeley
CoI: Suzanne Hawley, University of Washington
CoI: Adam Kowalski, University of Washington
CoI: Larry Ramsey, Pennsylvania State University
CoI: Steven Saar, CfA
CoI: Gabor Furesz, CfA

Title: MMT Hectochelle Spectral Variability Study of Active Late-type Stars in the Kepler Field

Abstract: We have on-going \it Kepler photometric monitoring of just under 200 active late-type (mid A - K) stars as part of its Guest Observer program. We propose to use the MMT Hectochelle multiobject spectrograph to observe just over 100 of these stars to determine a range of basic physical properties for the stars, such as radial velocity variations due to binarity, chromospheric activity levels from Ca II H+K and H(alpha), projected rotational velocities for comparison to the rotational periods measured directly by \it Kepler, age/youth as indicated by Li I, and better effective temperature and luminosity estimates. In addition, roughly another 1,000 interesting late-type stars that are being observed by the \it Kepler Team will be observed using the unassigned fibers in each field. Most of these measurements require the 32,000 spectral resolution provided by Hectochelle, which is hard to obtain efficiently for 13-14th magnitudes stars any other way.


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NOAO >   Observing Info >   Approved Programs >   2010B-0340

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