NOAO >   Observing Info >   Approved Programs >   2017B-0206

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Program Information for 2017B-0206


PI: Jao Wei-Chun, Georgia State U., jao@astro.gsu.edu
Address: Department of Physics and Astronomy, Atlanta, GA, 30303 USA

CoI: Todd Henry, Georgia State U.
CoI: Russel White, Georgia State U.

Title: Search Close Companions Around Cool Subdwarfs

Abstract: The multiplicity of cool subdwarfs has been reported lately in the literatures, but they offer a wide discrepancy from a few percent to 26%. Searches have been done for binary separations greater than 30-50 mas, but companions closer than this limit have not been explored. We propose to use Gemini-South/ Phoenix high resolution spectrgraph to minitor radial velocities of nearby confirmed cool subdwarfs, so that we can detect very close pairs of subdwarf binaries. We hope to answer the question of multiplicity differences in the literatures and between cool subdwarfs and their main sequence counter parts.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2017B):  GEM-S-SVC/PHNX -- 21.2hrs band 3 (GS-2017B-Q-66)


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NOAO >   Observing Info >   Approved Programs >   2017B-0206

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