NOAO >   Observing Info >   Approved Programs >   2018A-0248

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Program Information for 2018A-0248


PI: Natalie Gosnell, Colorado College, ngosnell@coloradocollege.edu
Address: Department of Physics, 14 E. Cache La Poudre St, Colorado Springs, CO 80903 USA

CoI: Andrew Mann, Columbia U.
CoI: Stephanie Douglas, Center for Astrophysics
CoI: Madeline Lucey, Colorado College
CoI: Marcel Agueros, Columbia U.

Title: Clusters with K2: systematics from membership and binarity

Abstract: The repurposed {it Kepler} mission, ktwo, has enabled new studies into the evolution of planetary systems as it observes young clusters and star forming regions over a range of ages and environments. Already our team has discovered planets in Upper Scorpius ($sim$10,Myr), Hyades, (800,Myr), and Praesepe (800,Myr), with a null detection in Pleiades (125,Myr). Our findings suggest that young planets are statistically larger than their older counterparts, and are consistent with a long ($>100$,Myr) timescale for planetary migration. However, such statistical studies require an accurate understanding of the parent sample of cluster candidates observed by ktwo. Incomplete or inaccurate membership lists for the cool stars and uncertain binary rates could lead to systematic errors when estimating the intrinsic planet population. Here we propose for additional radial velocities of ktwo cluster targets using Hydra on WIYN. With the proposed spectra we can detect the majority of binaries and remove interlopers from the cluster membership lists, both of which are necessary to maximize the scientific utility of results from ktwo cluster observations.

Program Type: Standard/NASA WIYN

Scheduled Nights:
Run 1 (2018A):  WIYN/HYDR -- 1.5n on Mar 08 - Mar 10 2018
Run 2 (2018A):  WIYN/HYDR -- 1n on Apr 03 - Apr 04 2018


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NOAO >   Observing Info >   Approved Programs >   2018A-0248

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