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Images of a fourth planet orbiting HR 8799
C. Marois, B. Zuckerman, Q. M. Konopacky +2
High-contrast near-infrared imaging of the nearby star HR 8799 has shown three giant planets. Such images were possible due to the wide orbits (> 25 AU) and youth (< 100 Myr) of th…
Ultracool Field Brown Dwarf Candidates Selected at 4.5 microns
Peter R. M. Eisenhardt, Roger L. Griffith, Daniel Stern +14
We have identified a sample of cool field brown dwarf candidates using IRAC data from the Spitzer Deep, Wide-Field Survey (SDWFS). The candidates were selected from 400,000 SDWFS s…
High Precision Dynamical Masses of Very Low Mass Binaries
Q. M. Konopacky, A. M. Ghez, T. S. Barman +5
[ABRIDGED] We present the results of a 3 year monitoring program of a sample of very low mass (VLM) field binaries using both astrometric and spectroscopic data obtained in conjunc…