NOAO >   Observing Info >   Approved Programs >   2017A-0239

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Program Information for 2017A-0239


PI: Eric Nielsen, SETI Institute/NASA Ames Research Center, enielsen@seti.org
Address: 189 BERNARDO AVE, MOUNTAIN VIEW, CA 94043 USA

CoI: Alexandra Greenbaum, Johns Hopkins U.
CoI: Quinn Konopacky, UC San Diego
CoI: Robert de Rosa, UC Berkeley
CoI: Jason Wang, UC Berkeley
CoI: Michael Ireland, Mount Stromlo Observatory
CoI: Peter Tuthill, U. of Sydney
CoI: Sarah Blunt, Brown U.
CoI: Kimberly Ward-Duong, Arizona State U.
CoI: Franck Marchis, SETI Institute/NASA Ames Research Center

Title: Orbits of Moving Group Binaries: Constraining the Ages of Planet-Hosting Moving Groups using GPI NRM Astrometric Monitoring

Abstract: Resolved spectroscopic binaries in moving groups are a unique opportunity to place strong constraints on the age of those moving groups, and serve as an orthogonal measurement method to make the final age determination more robust. We propose here to observe seven moving group binaries with GPI NRM (and an additional wide binary with GPI unblocked mode) to characterize the orbits of these objects so that these stars may be used as calibrators for the ages of their host moving groups. Ages are vital for characterizing planet and brown dwarf companions, the majority of which are found around moving group stars, and so accurate ages for these groups strongly impact our understanding of directly imaged planets and brown dwarfs. We have recently demonstrated the viability of this method using two sets of binaries in the beta Pic moving group, and propose here to expand this technique to other groups and greatly reduce the uncertainties in quoted ages of nearby moving group stars and planets.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2017A):  GEM-SQ/GPI -- 7.4hrs band 2 (GS-2017A-Q-40)


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-0239

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