NOAO >   Observing Info >   Approved Programs >   2018A-0023

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Program Information for 2018A-0023


PI: Steve B Howell, NASA Ames Research Center, steve.b.howell@nasa.gov
Address: M/S 245-1, Moffett Field, CA, 94035 USA

CoI: Mark Everett, NOAO
CoI: David Ciardi, NEXScI
CoI: Rachel Matson, NASA Ames Research Center
CoI: Elliott P Horch, SCSU
CoI: Nic Scott, NASA Ames Research Center

Title: K2 Exoplanet Candidates: Small high-value planet characterization

Abstract: At present, there are over 200 unvetted exoplanet candidates from K2. Past systems we have characterized include the four current best small exoplanets amenable to transit spectroscopy by JWST; K2-3b, K2-18b, K2-9b, TRAPPIST-1. The knowledge of a companion star (or not) allows the correct exoplanet radius (and thus mean density) to be determined, thereby assuring that these three planets are of rocky composition. Our group has shown that ~50% of host stars are binary and without our imaging, planet radii are underestimated by an average factor of 1.5x. Many more small K2 exoplanet candidates exist, some orbiting very bright stars, making them ideal for follow-up spectroscopy. We wish to use high-resolution imaging at both Gemini telescopes to validate candidates as well as determine if companion stars exist. This program will allow proper planet radii and mean densities to be determined and yield additional high-value transit spectroscopy candidates for observation. We will continue to make all our reduced data products public immediately at the NASA Explanet Archive.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2018A):  GEM-S-SVC/DSSI -- 40hrs band 1 (GS-2018A-Q-121 )


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 >   2018A-0023

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