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Testing Substellar Models with Dynamical Mass Measurements
Trent J. Dupuy, Michael C. Liu, Michael J. Ireland
We have been using Keck laser guide star adaptive optics to monitor the orbits of ultracool binaries, providing dynamical masses at lower luminosities and temperatures than previou…
Interferometric Studies of Hot Stars at Sydney University
J. G. Robertson, J. Davis, M. J. Ireland +5
The University of Sydney has a long history in optical stellar interferometry. The first project, in the 1960s, was the Narrabri Stellar Intensity Interferometer, which measured th…
Keck Laser Guide Star Adaptive Optics Monitoring of the M8+L7 Binary LHS 2397aAB: First Dynamical Mass Benchmark at the L/T Transition
Trent J. Dupuy, Michael C. Liu, Michael J. Ireland
We present Keck LGS AO imaging and aperture masking observations of the M8+L7 binary LHS 2397aAB. Together with archival HST, Gemini-North, and VLT data, our observations span 11.8…
Planetary system, star formation, and black hole science with non-redundant masking on space telescopes
Anand Sivaramakrishnan, Peter Tuthill, Michael Ireland +5
Non-redundant masking (NRM) is a high contrast, high resolution technique relevant to future space missions concerned with extrasolar planetary system and star formation, as well a…
Confronting Substellar Theoretical Models with Stellar Ages
Trent J. Dupuy, Michael C. Liu, Michael J. Ireland
By definition, brown dwarfs never reach the main-sequence, cooling and dimming over their entire lifetime, thus making substellar models challenging to test because of the strong d…