212 citations · 371 across the 4 of their papers we have counts for
6 papers · 1 filter
Mapping the Shores of the Brown Dwarf Desert I.: Upper Scorpius
Adam L. Kraus, Michael J. Ireland, Frantz Martinache +1
We present the results of a survey for stellar and substellar companions to 82 young stars in the nearby OB association Upper Scorpius. This survey used nonredundant aperture-mask…
Dynamical Mass of GJ 802B: a brown dwarf in a triple system
M. J. Ireland, A. Kraus, F. Martinache +2
We report a dynamical measurement of the mass of the brown dwarf GJ 802B using aperture-masking interferometry and astrometry. In addition, we report the discovery that GJ 802A is…
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…
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…
Exoplanet Imaging with a Phase-induced Amplitude Apodization Coronagraph III. Hybrid Approach: Optical Design and Diffraction Analysis
E. A. Pluzhnik, O. Guyon, S. T. Ridgway +4
Properly apodized pupils can deliver point spread functions (PSFs) free of Airy rings, and are suitable for high dynamical range imaging of extrasolar terrestrial planets (ETPs). T…
Exoplanets imaging with a Phase-Induced Amplitude Apodization Coronagraph - I. Principle
Olivier Guyon, Eugene A. Pluzhnik, Raphael Galicher +3
Using 2 aspheric mirrors, it is possible to apodize a telescope beam without losing light or angular resolution: the output beam is produced by ``remapping'' the entrance beam to p…