A Survey for Faint, Close, Low-Mass Tertiaries to Nearby Spectroscopic Binaries

Details A Survey for Faint, Close, Low-Mass Tertiaries to Nearby Spectroscopic Binaries A Survey for Faint, Close, Low-Mass Tertiaries to Nearby Spectroscopic Binaries

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009noao.prop..173a&link_type=abstract

NOAO Proposal ID #2009A-0173

Computer Science

Scientific paper

We propose to use NGS AO Altair/NIRI imaging at Gemini-North to carry out a multi-epoch common proper motion survey of a carefully selected sample of 60 known nearby spectroscopic binaries for tertiary companions. Recent star formation simulations and observations have demonstrated that main sequence spectroscopic binaries have an enhanced wide (>30 AU) companion rate compared to single stars. This rate has been found to be from 60% to nearly 100% depending on the period of the spectroscopic binary. We will take advantage of this high tertiary companion rate to look for ultracool companions with separations from a few AU (>0.1") to a few hundred AU (<20"). This is an excellent "poor" sky condition project for Gemini to execute in non-photometric conditions, that will inform our models of star formation and possibly detect new nearby ultra-cool faint companions.

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