NOAO >   Observing Info >   Approved Programs >   2016A-0284

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Program Information for 2016A-0284


PI: Bo Ma, U. of Florida, boma@ufl.edu
Address: Astronomy Department, 211 Bryant Space Science Center, Gainesville, FL 32611 USA

CoI: Ji Wang, California Institute of Technology
CoI: Debra Fischer, Yale U.
CoI: Tabetha S Boyajian, Yale U.
CoI: John Brewer, Yale U.
CoI: Nolan Grieves, U. of Florida
CoI: Jian Ge, U. of Florida

Title: Confirming the Planet-Metallicity Correlation For Small Planets

Abstract: Gas giant planets are preferentially found around metal-rich stars. This planet-metallicity correlation provides important evidence for the core-accretion scenario for large planet formation. Similarly, a planet- metallicity for smaller planets would have significant implications to the theory of planet formation as well as strategic planning for future missions in search of terrestrial planets. Should the correlation is firmly established, metal-rich stars should be prioritized to increase the likelihood of finding terrestrial planets. For terrestrial planets (R$_P<$ 1.7 R$_oplus$), a planet-metallicity correlation has recently been suggested by Wang & Fischer (2015). However, such a correlation is called into question by Buchhave & Latham (2015). We propose to use WIYN's Hydra Bench spectrograph to resolve the discrepancy between these two studies. We will take spectra of sci host stars for transiting terrestrial exoplanets from the Kepler mission (science sample) and con stars with no planet detections in the Kepler field (control sample). By comparing the metallicity distribution of the two samples, we can confirm or rule out the planet-metallicity correlation for terrestrial planets. The spectra of all Kepler stars in this study, regardless of hosting transiting planets or not, will improve our understanding of stellar population in the Kepler field.

Program Type: Standard/NASA WIYN

Scheduled Nights:
Run 1 (2016A):  WIYN/HYDR -- 7n on Jun 16 - Jun 19 2016, Jul 02 - Jul 04 2016


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 >   2016A-0284

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