Infrared radial velocities of vB 10

Abstract

We present radial velocities of the M8V-type, very low-mass star vB 10 that have been obtained at four different epochs of observations 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, a result that is consistent with the recent finding of a massive planet companion around the star by Pravdo & Shaklan (2009). 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.

4 pages, accepted for publication in A&A Letters

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Cited by in corpus (10)

• The NIRSPEC Ultracool Dwarf Radial Velocity Survey
• The CRIRES Search for Planets Around the Lowest-Mass Stars. I. High-Precision Near-Infrared Radial Velocities with an Ammonia Gas Cell
• The effect of M dwarf starspot activity on low-mass planet detection thresholds
• Intermediate Resolution Near-Infrared Spectroscopy of 36 late-M Dwarfs
• Astrometric search for a planet around VB 10
• Strong Constraints to the Putative Planet Candidate around VB 10 using Doppler spectroscopy
• 2MASS J20261584-2943124: An Unresolved L0.5 + T6 Spectral Binary
• Keck NIRSPEC Radial Velocity Observations of Late-M dwarfs
• Search for radial velocity variations in eight M-dwarfs with NIRSPEC/Keck II
• High resolution near-infrared spectroscopy of a flare around the ultracool dwarf vB 10