Mapping the Shores of the Brown Dwarf Desert III: Young Moving Groups
Thomas M. Evans, Michael J. Ireland, Adam L. Kraus, Frantz Martinache,, Paul Stewart, Peter G. Tuthill, Sylvestre Lacour, John M. Carpenter, Lynne A., Hillenbrand

TL;DR
This study used aperture masking interferometry to survey young nearby stars for substellar companions, finding one stellar companion and setting upper limits on the frequency of giant planets in the 20-80 Jupiter mass range.
Contribution
First comprehensive high-contrast imaging survey of young moving group stars for substellar companions, providing new constraints on their occurrence rates.
Findings
Discovered a 0.52 solar mass companion to HIP14807.
Revised the orbit and mass estimate of the companion to HD16760.
Placed an upper limit of ~9-11% on the frequency of 20-80 Jupiter mass companions at 3-30AU.
Abstract
We present the results of an aperture masking interferometry survey for substellar companions around 67 members of the young (~8-200Myr) nearby (~5-86pc) AB Doradus, Beta Pictoris, Hercules-Lyra, TW Hya, and Tucana-Horologium stellar associations. Observations were made at near infrared wavelengths between 1.2-3.8 microns using the adaptive optics facilities of the Keck II, VLT UT4, and Palomar Hale Telescopes. Typical contrast ratios of ~100-200 were achieved at angular separations between ~40-320mas, with our survey being 100% complete for companions with masses below 0.25\msolar across this range. We report the discovery of a \msolar companion to HIP14807, as well as the detections and orbits of previously known stellar companions to HD16760, HD113449, and HD160934. We show that the companion to HD16760 is in a face-on orbit, resulting in an upward revision of its mass…
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