NOAO >   Observing Info >   Approved Programs >   2017A-0361

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Program Information for 2017A-0361


PI: Verne V Smith, NOAO, vsmith@noao.edu
Address: NSSC, 950 N. Cherry Ave., Tucson, AZ 85719 USA

CoI: Katia Cunha, U. of Arizona
CoI: Cintia F Martinez, Observatorio Nacional Brazil
CoI: Johanna Teske, Carnegie Institution of Washington
CoI: Steve B Howell, NASA Ames Research Center
CoI: Simon C Schuler, University of Tampa
CoI: Luan Ghezzi, Observatorio Nacional Brazil

Title: Accurate Stellar Characterization for Kepler Extended Mission (K2) Exoplanet Host Stars

Abstract: The determination of accurate physical parameters for stars that host exoplanets is a crucial step in characterizing the size and nature of the planets themselves. In addition to the basic stellar parameters of effective temperature (T$_{rm eff}$), surface gravity (most often characterized by log g), stellar mass, and stellar radius, the stellar chemical composition is important in understanding any connections between planetary formation and stellar chemistry. The chemical composition of the star reflects the chemistry of the interstellar cloud from which the star and its planets formed, while the abundances of key metals, such as Fe, Mg, or Si, or the ratio of C/O may affect the nature of the planetary system architecture. High-resolution spectroscopy is an excellent tool with which to both derive accurate stellar physical parameters, along with detailed chemical abundances. This proposal will target exoplanet host-stars discovered by both the original Kepler Mission and the Kepler Extended Mission (K2) surveys and subject them to accurate stellar parameter determinations and detailed chemical abundance analyses. The results will both strengthen constraints on the nature of the planets, as well as the evolutionary history of the planetary system’s host star. This program has been granted 6 nights each in semesters 15B, 16A, and 16B, and would likely reach the preferred sample size with successful observing time in 17A.

Program Type: Standard/NASA WIYN

Scheduled Nights:
Run 1 (2017A):  WIYN/HYDR -- 3n on Feb 08 - Feb 10 2017
Run 2 (2017A):  WIYN/HYDR -- 3.5n on Jun 07 - Jun 10 2017


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 >   2017A-0361

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