NOAO >   Observing Info >   Approved Programs >   2016A-0088

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Program Information for 2016A-0088


PI: Daniel Q Nagasawa, Texas A&M U., dqnagasawa@physics.tamu.edu
Address: Department of Physics and Astronomy, 4242 TAMU, College Station, Texas 77843-4242 USA

CoI: Jennifer Marshall, Texas A&M U.

Title: Metallicity of M-dwarf Exoplanet Hosts through F/G/K+M Common Proper Motion Binary Pair Analysis

Abstract: We propose to use the HYDRA instrument and the Bench Spectrograph on the WIYN telescope to develop a technique to determine the metallicity of M-dwarf exoplanet hosts. M-dwarfs present ideal targets for NASA exoplanet search programs such as K2 and TESS due to their low mass and low luminosity. Historically, it has been difficult to measure the metallicity of M-dwarfs directly due to the chemical complexity of their atmospheres. We have assembled a large sample of common proper motion F/G/K+M binary pairs to be used to derive an empirical relation of M- dwarf metallicity at the WIYN telescope. We will measure the [Fe/H] of the F/G/K primary star directly using high resolution spectroscopy. Molecular spectral line indices known to be sensitive to metallicity will be measured in the accompanying M-dwarf secondary using low resolution spectroscopy at other telescopes. We will then develop a correlation between the measured [Fe/H] and the molecular spectral line indices. This relation will be applied to low resolution, optical spectroscopic observations of any M-dwarf exoplanet host, enabling a better understanding of the population as a whole.

Program Type: Standard/NASA WIYN

Scheduled Nights:
Run 1 (2016A):  WIYN/HYDR -- 3.5n on Feb 18 - Feb 21 2016
Run 2 (2016A):  WIYN/HYDR -- 3n on Jul 11 - Jul 13 2016


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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