Volume 505, Number 1, October I 2009
|Page(s)||L5 - L8|
|Published online||03 September 2009|
Letter to the Editor
Infrared radial velocities of vB 10*
Centro de Astrobiología (CAB-CSIC), Ctra. Ajalvir km 4, 28850 Torrejón de Ardoz, Madrid, Spain e-mail: firstname.lastname@example.org
2 Formerly at Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain
3 University of Central Florida, Physics Department, PO Box 162385, Orlando, FL32816, USA
4 School of Cosmic Physics, Dublin Institute for Advanced Studies, Dublin 2, Ireland
5 Instituto de Astrofísica de Canarias, 38200, La Laguna, Tenerife, Spain
Accepted: 25 August 2009
We present radial velocities of the M8V-type, very low-mass star vB 10 obtained at four different epochs between 2001 and 2008. We use high-resolution (R ~ 20 000) near-infrared (J-band) spectra taken with the nirspec instrument on the Keck II telescope. Our data suggest that vB 10 shows radial velocity variability with an amplitude of ~1 km s-1, a result that is consistent with the recent finding of a massive planet companion around the star. More velocity measurements and a better sampling of the orbital phase are required to precisely constrain the orbital parameters and the individual masses of the pair.
Key words: stars: late-type / stars: low-mass, brown dwarfs / stars: individual: vB 10 / techniques: radial velocities / planetary systems / binaries: general
© ESO, 2009
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