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J/A+A/505/L5        Infrared radial velocities of vB10       (Zapatero+, 2009)

Infrared radial velocities of vB10. Zapatero Osorio M.R., Martin E.L., Del Burgo C., Deshpande R., Rodler F., Montgomery M.M. <Astron. Astrophys., 505, L5-L8 (2009)> =2009A&A...505L...5Z
ADC_Keywords: Stars, late-type ; Radial velocities ; Spectra, infrared Keywords: stars: late-type - stars: low-mass, brown dwarfs - stars: individual: vB 10 - techniques: radial velocities - planetary systems - binaries: general Abstract: 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∼20000) 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 ∼1km/s, 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. Description: As part of our program of radial velocity monitoring of late M-type stars, we observed vB10 on four different occasions between 2001 and 2008 using the Keck II telescope and the nirspec instrument, which is a crossdispersed, cryogenic echelle spectrometer employing a 1024x1024 ALADDIN InSb array detector. Objects: ----------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------- 19 16 57.6 +05 09 02 vB 10 = V* V1298 Aql ----------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 45 5 NIRSPEC radial velocity measurements of vB 10
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 11 F11.5 d MJD Modified Julian date (JD-2400000.5) 12 A1 --- n_MJD [b] b for reference epoch 14- 18 F5.2 km/s RV Radial velocity 20- 23 F4.2 km/s e_RV rms uncertainty on RV 25- 29 F5.2 km/s RVrel ? Relative radial velocity 31- 34 F4.2 km/s e_RVrel ? rms uncertainty on RVrel 36- 40 F5.2 km/s shift ? Radial velocity shift (1) 42- 45 F4.2 km/s e_shift ? rms uncertainty on shift
Note (1): Relative offset in velocity zero point.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Oct-2009
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