NOAO >   Observing Info >   Approved Programs >   2013B-0319

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Proposal Information for 2013B-0319


PI: S. Mark Ammons, Lawrence Livermore National Laboratory, ammons1@llnl.gov
Address: Livermore, CA, 94551-9900, USA

CoI: Christian Marois, Herzberg Institute of Astrophysics
CoI: Bruce Macintosh, Lawrence Livermore National Laboratory
CoI: Quinn Konopacky, University of Toronto
CoI: Benoit Neichel, Gemini Telescope
CoI: Raphael Galicher, Observatoire de Paire
CoI: Eduardo Bendek, NASA Ames
CoI: Olivier Guyon, University of Arizona

Title: A Test of GEMS Astrometric Precision for Exoplanet Detection and Mass Measurement

Abstract: Precision astrometry is so far the only mainstream exoplanet detection technique that has yet to find a new planet. The unique capabilities of GeMS and GSAOI may finally be what we have been waiting for: the combination of a large aperture and wide-field AO correction for stable high-resolution wide-field diffraction-limited imaging. As part of a multi-year program starting in 2013A, we are observing SCR 1845 and Mu Arae in 2013A to (1) astrometrically verify the presence and measure the dynamical mass of the nearby brown dwarf companion orbiting SCR 1845 (Biller et al. 2006) and (2) measure the dynamical mass of mu Arae e, an RV discovery of 1.9 MJUP with a signal of approximately 0.5 mas (Pepe et al. 2008). Here, due to visibility constraints on SCR 1845 and Mu Arae, we propose four new epochs on the closest brown dwarf pair at 2 pc, WISE J1049-53 (Luhman 2013), newly discovered with Gemini in 2013 to be the third closest system known. GEMS will in one year obtain the best available projected relative orbits and a < 1% trigonometric distance, enabling precision masses and luminosity measurements for both L/T transition components.


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