NOAO >   Observing Info >   Approved Programs >   2017B-0813

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Program Information for 2017B-0813


PI: Benjamin Tofflemire, U. of Wisconsin, Madison, tofflemi@astro.wisc.edu
Address: Astronomy Department, 475 N. Charter St, Madison, WI 53706 United States

CoI: Robert Mathieu, U. of Wisconsin, Madison
CoI: Emily Leiner, U. of Wisconsin, Madison
CoI: Erika K Carlson, U. of Wisconsin, Madison

Title: A Search for Spectroscopic Binaries in the Young Cluster NGC 2264

Abstract: Roughly half of all stars are born into binary systems, and the evolution of protoplanetary disks in the binary environment is a current frontier of star-formation research. Close binaries ($a$$<$1AU) challenge our understanding of disk evolution most, yet it is in this regime where the fewest number of accreting, pre-main sequence systems are known. This paucity is due to the lack of large-scale, time- intensive spectroscopic surveys required to find short-period binaries. The young cluster NGC 2264, however, offers a unique setting where the search for accreting binaries can be significantly narrowed. Recent observations with $CoRoT$ have distinguished actively accreting objects and characterized their variability. Variability is a marker of accretion generally, but our previous work has shown that short-period accreting binaries have distinct variability signatures, specifically periodic brightening events. We suggest that these signatures allow us to identify accreting binaries based on their optical variability alone. To test this hypothesis, we propose a multi-epoch, radial-velocity monitoring program with WIYN/Hydra. We expect to discover new accreting binaries and further our understanding of the binary-disk interaction.

Program Type: WTAC

Scheduled Nights:
Run 1 (2017B):  WIYN/HYDR -- 2n on Oct 28 2017, Nov 09 2017, Nov 27 2017, Dec 19 2017


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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