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Two Wide Planetary-Mass Companions to Solar-Type Stars in Upper Scorpius
Michael J. Ireland, Adam L. Kraus, Frantz Martinache +2
At wide separations, planetary-mass and brown dwarf companions to solar type stars occupy a curious region of parameters space not obviously linked to binary star formation or sola…
Establishing Alpha Oph as a Prototype Rotator: Improved Astrometric Orbit
Sasha Hinkley, John D. Monnier, Ben R. Oppenheimer +24
The nearby star Alpha Oph (Ras Alhague) is a rapidly rotating A5IV star spinning at ~89% of its breakup velocity. This system has been imaged extensively by interferometric techniq…
Kernel-Phase in Fizeau Inteferometry
Frantz Martinache
The detection of high contrast companions at small angular separation appears feasible in conventional direct images using the self-calibration properties of interferometric observ…
A Close Companion Search around L Dwarfs using Aperture Masking Interferometry and Palomar Laser Guide Star Adaptive Optics
David Bernat, Antonin H. Bouchez, Michael Ireland +22
We present a close companion search around sixteen known early-L dwarfs using aperture masking interferometry with Palomar laser guide star adaptive optics. The use of aperture mas…