NOAO > Observing Info > Approved Programs > 2013A-0128
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NOAO > Observing Info > Approved Programs > 2013A-0128 |
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PI: Ellyn K. Baines, Naval Research Laboratory, ellyn.baines@nrl.navy.mil
Address: Remote Sensing Division, 4555 Overlook Ave SW, Washington, DC 20375, USA
CoI: Martin Vanko, Slovak Academy of Sciences
CoI: Pawel Zielinski, Nicolaus Copernicus University
CoI: Andrzej Niedzielski, Nicolaus Copernicus University
CoI: Aleksander Wolszczan, Pennsylvania State University
Title: Measuring Candidate Exoplanet Host Star Radii
Abstract:
We propose to measure the radii of exoplanet host star candidates
using the CHARA Array. The target sample consists of 17 giant and
subgiant stars taken from Penn State-Torun Planet Search survey, and all
of them are sufficiently bright and nearby that can be easily measured
interferometrically. The radii of giant stars obtained from
spectroscopic properties are usually ill-defined due to the indirect
nature of the method used and evolutionary model dependency. However,
the radius of the star is a critical parameter for the calculation of
stellar luminosity and mass, which are often not well known for giant
stars. Therefore, this problem also influences the determination of the
orbital period, mass, and the surface temperature of the planet.
Interferometric observations will significantly decrease the errors in
these parameters.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2013A-0128 |
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