Dynamical Masses of the Binary Brown Dwarf GJ 569 Bab

  title={Dynamical Masses of the Binary Brown Dwarf GJ 569 Bab},
  author={M. Osorio and B. Lane and Y. Pavlenko and E. Martin and M. Britton and S. Kulkarni},
  journal={The Astrophysical Journal},
We have obtained new images and high-resolution (R ~ 22,400) near-infrared (1.2400-1.2575 μm) spectra of each component of the brown dwarf binary GJ 569 Bab using the adaptive optics facility of the Keck II telescope and the NIRSPEC spectrometer. These data have allowed us to improve the determination of the astrometric orbit and to measure radial velocities of the components. We have used the astrometric and spectroscopic measurements to derive the dynamical mass of each brown dwarf and the… Expand
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