The promise of both these methods demonstrate that optical interferometers are a valuable tool for probing unique regimes of exoplanet science. We perform injection tests with MIRC-X and MYSTIC at CHARA for the hot Jupiter exoplanet Ups And b to show that we are reaching down to a contrast of 2e-4. Detecting the infrared spectra of such planets allows us to place useful constraints on atmosphere circulation models. With Project PRIME, we show that ground-based optical interferometry can be used to measure the orbit-dependent spectra of close-in “hot Jupiter”-type exoplanets with precision closure phases. We present the status of our survey, including our newly implemented etalon wavelength calibration method at CHARA, detection of new stellar mass companions, and non-detection limits down to a few Jupiter masses in some cases. I briefly review the potential impact of Gaia micro-arsec astrometry in several areas of exoplanet science, discuss what key follow-up observations might be. This incredible precision allows us to probe the au-regime for giant planets orbiting individual stars of the binary system.
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In addition to the detection of exoplanets. We are achieving astrometric precision at the few tens of micro-arcsecond level in short observations at CHARA/MIRC-X and VLTI/GRAVITY. Astrometry is a branch of astronomy that involves precise measurements of the positions and movements of stars and.
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We are pushing the astrometric limits of ground-based optical interferometers to carry out a survey of sub-arcsecond A/B-type binary systems with ARMADA. While 4 exoplanets have been detected using the Astrometry method as of November 2018 none of these discoveries have been confirmed by other methods.
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Current detection methods struggle to find exoplanets around hot (A/B-type) stars. In this thesis work, we exploit the unique capabilities of long baseline interferometry to fill two gaps in exoplanet parameter space: 1) the discovery of new planets around stars more massive than the Sun (Project ARMADA), and 2) the characterization of known planets that are extremely close to their host star (Project PRIME).