105 citations · 237 across the 3 of their papers we have counts for
7 papers
Discovery of a wide companion near the deuterium burning mass limit in the Upper Scorpius association
V. J. S. Bejar, M. R. Zapatero Osorio, A. Perez-Garrido +5
We present the discovery of a companion near the deuterium burning mass limit located at a very wide distance, at an angular separation of 4.6+/-0.1 arcsec (projected distance of ~…
Space Velocities of L- and T-type Dwarfs
M. R. Zapatero Osorio, E. L. Martin, V. J. S. Bejar +3
(Abridged) We have obtained radial velocities of a sample of 18 ultracool dwarfs (M6.5-T8) using high-resolution, near-infrared spectra obtained with NIRSPEC and the Keck II telesc…
Pleiades low-mass brown dwarfs: the cluster L dwarf sequence
G. Bihain, R. Rebolo, V. J. S. Bejar +5
We present a search for low-mass brown dwarfs in the Pleiades open cluster. The identification of Pleiades members fainter and cooler than those currently known allows us to constr…
Multiplicity of very low-mass objects in the Upper Scorpius OB association: a possible wide binary population
H. Bouy, E. L. Martin, W. Brandner +5
We report the initial results of a VLT/NACO high spatial resolution imaging survey for multiple systems among 58 M-type members of the nearby Upper Scorpius OB association. Nine pa…
Optical Linear Polarization of Late M- and L-Type Dwarfs
M. R. Zapatero Osorio, J. A. Caballero, V. J. S. Bejar
(Abridged). We report on the linear polarimetric observations in the Johnson I filter of 44 M6-L7.5 ultracool dwarfs (2800-1400 K). Eleven (10 L and 1 M) dwarfs appear to have sign…
Photometric variability of young brown dwarfs in the sigma Orionis open cluster
J. A. Caballero, V. J. S. Bejar, R. Rebolo +1
We have carried out multi-epoch, time-series differential I-band photometry of a large sample of objects in the south-east region of the young (~3 Myr), nearby (~350 pc) sigma Orio…