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Direct imaging with highly diluted apertures. I. Field of view limitations
O. Lardiere, F. Martinache, F. Patru
Future optical interferometric instrumentation mainly relies on the availability of an efficient cophasing system: once available, what has so far postponed the relevance of direct…
Precision Masses of the low-mass binary system GJ 623
Frantz Martinache, James P. Lloyd, Michael J. Ireland +2
We have used Aperture Masking Interferometry and Adaptive Optics (AO) at the Palomar 200'' to obtain precise mass measurements of the binary M dwarf GJ 623. AO observations spread…
Direct Detection of the Brown Dwarf GJ 802B with Adaptive Optics Masking Interferometry
James P. Lloyd, Frantz Martinache, Michael J. Ireland +4
We have used the Palomar 200" Adaptive Optics (AO) system to directly detect the astrometric brown dwarf GJ 802B reported by Pravdo et al. 2005. This observation is achieved with a…
Masses of Astrometrically-Discovered and Imaged Binaries: G 78-28AB and GJ 231.1BC
Steven H. Pravdo, Stuart B. Shaklan, Sloane J. Wiktorowicz +5
The Stellar Planet Survey (STEPS) is an ongoing astrometric search for giant planets and brown dwarfs around a sample of ~30 M-dwarfs. We have discovered several low-mass companion…