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Four Brown Dwarfs in the Taurus Star-Forming Region
E. L. Martin, C. Dougados, E. Magnier +4
We have identified four brown dwarfs in the Taurus star-forming region. They were first selected from and CCD photometry of 2.29 square degrees obtained at the Canada-Franc…
Optical spectroscopy of isolated planetary mass objects in the sigma Orionis cluster
D. Barrado-y-Navascués, M. R. Zapatero-Osorio, V. J. S. Béjar +5
We have obtained low resolution optical spectra of 15 isolated planetary mass objects (IPMOs) in the sigma Orionis cluster, and derived spectral types by comparison with nearby M a…
The orbit of the brown dwarf binary Gl 569B
B. F. Lane, M. R. Zapatero Osorio, M. C. Britton +2
We present photometric, astrometric and spectroscopic observations of the nearby (9.8 pc) low-mass binary Gl 569Bab (in turn being a companion to the early-M star Gl 569A), made wi…