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Proceedings Paper

Precision astrometry with adaptive optics: constraints on the mutual orbit of Luhman 16AB from GeMS
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Paper Abstract

ELTs equipped with MCAO systems will be powerful astrometric tools in the next two decades. With sparse-field precisions exceeding 30 uas for V > 18, the ELTs will surpass even GAIA's per-epoch precision for faint stars (V > 12). We present results from an ongoing astrometry program with Gemini GeMS and discuss synergies with WFIRST and GAIA. First, we present a fit to the relative orbit of the individual L/T components of Luhman16 AB, the nearest brown dwarf binary known. Exploiting GeMS' wide field of view to image reference stars, we are able to track the relative motion to better than 0.2 mas. We find that a mutual Keplerian orbit with no perturbing planets fits the binary separation to within the measurement errors, ruling out companions down to 14 earth masses for certain orbits and periods.

Paper Details

Date Published: 2 September 2016
PDF: 9 pages
Proc. SPIE 9909, Adaptive Optics Systems V, 99095T (2 September 2016); doi: 10.1117/12.2233775
Show Author Affiliations
S. Mark Ammons, Lawrence Livermore National Lab. (United States)
E. Victor Garcia, Lawrence Livermore National Lab. (United States)
Maissa Salama, Univ. of Hawaii (United States)
Benoit Neichel, Aix Marseille Univ., CNRS, LAM (France)
Gemini Observatory (Chile)
Jessica Lu, Univ. of California, Berkeley (United States)
Christian Marois, National Research Council of Canada (Canada)
Bruce Macintosh, Stanford Univ. (United States)
Dmitry Savransky, Cornell Univ. (United States)
Eduardo Bendek, NASA Ames Research Ctr. (United States)
Olivier Guyon, Univ. of Arizona (United States)
Eduardo Marin, Gemini Observatory (Chile)
Vincent Garrel, Gemini Observatory (Chile)
Gaetano Sivo, Gemini Observatory (Chile)

Published in SPIE Proceedings Vol. 9909:
Adaptive Optics Systems V
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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