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 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:
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RA (2000) DE Designation(s)
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19 16 57.6 +05 09 02 vB 10 = V* V1298 Aql
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 45 5 NIRSPEC radial velocity measurements of vB 10
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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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
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Note (1): Relative offset in velocity zero point.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Oct-2009