Mapping the Shores of the Brown Dwarf Desert III: Young Moving Groups

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 $0.52\pm 0.09$\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 from $M_2\sin i\sim 14$\mjupiter to $M_2=0.28\pm 0.04$\msolar. No substellar companions were detected around any of our sample members, despite our ability to detect companions with masses below 80\mjupiter for 50 of our targets: of these, our sensitivity extended down to 40\mjupiter around 30 targets, with a subset of 22 subject to the still more stringent limit of 20\mjupiter. A statistical analysis of our non-detection of substellar companions allows us to place constraints on their frequency around ~0.2-1.5\msolar stars. In particular, considering companion mass distributions that have been proposed in the literature, we obtain an upper limit estimate of ~9-11% for the frequency of 20-80\mjupiter companions between 3-30AU at 95% confidence, assuming that their semimajor axes are distributed according to $d\mathcal{N}/da\propto a^{-1}$ in this range.

Accepted by ApJ

References in corpus (22)

• Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics
• The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters
• On the Luminosity of Young Jupiters
• The properties of brown dwarfs and low-mass hydrogen-burning stars formed by disc fragmentation
• The Gemini Deep Planet Survey -- GDPS
• The Effects of Radiative Transfer on Low-Mass Star Formation
• The Two Modes of Gas Giant Planet Formation
• The Palomar/Keck Adaptive Optics Survey of Young Solar Analogs: Evidence for a Universal Companion Mass Function
• The Disk Around CoKu Tau/4: Circumbinary, not Transitional
• Mapping the Shores of the Brown Dwarf Desert I.: Upper Scorpius
• The nearest young moving groups
• A novel L-band imaging search for giant planets in the Tucana and Beta Pictoris moving groups
• Young Nearby Loose Associations
• Constraints on Extrasolar Planet Populations from VLT NACO/SDI and MMT SDI and Direct Adaptive Optics Imaging Surveys: Giant Planets are Rare at Large Separations
• Keck Laser Guide Star Adaptive Optics Monitoring of the M8+L7 Binary LHS 2397aAB: First Dynamical Mass Benchmark at the L/T Transition
• Deficit of wide binaries in the eta Chamaeleontis young cluster
• An Improbable Solution to the Underluminosity of 2M1207B: A Hot Protoplanet Collision Afterglow
• Dynamical Mass of GJ 802B: a brown dwarf in a triple system
• Dynamical Evolution of the TW Hya Association
• Masses of Astrometrically-Discovered and Imaged Binaries: G 78-28AB and GJ 231.1BC
• The Cornell High-order Adaptive Optics Survey for Brown Dwarfs in Stellar Systems-II: Results from Monte Carlo Population Analyses
• Testing evolutionary tracks of Pre-Main Sequence stars: the case of HD113449

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• New Spatially Resolved Mid-IR Observations of the Transitional Disk TW Hya and Tentative Evidence for a Self-Luminous Companion
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