Hubble Space Telescope astrometry of the closest brown dwarf binary system -- I. Overview and improved orbit

L. R. Bedin, D. Pourbaix, D. Apai +4

Located at ~2pc, the L7.5+T0.5 dwarfs system WISE J104915.57-531906.1 (Luhman16AB) is the third closest system known to Earth, making it a key benchmark for detailed investigation…