J/A+A/512/A37 Velocities of 43 nearby L dwarfs (Seifahrt+, 2010)
On the kinematic age of brown dwarfs:
radial velocities and space motions of 43 nearby L dwarfs.
Seifahrt A., Reiners A., Almaghrbi K.A.M., Basri G.
<Astron. Astrophys. 512, A37 (2010)>
=2010A&A...512A..37S 2010A&A...512A..37S
ADC_Keywords: Stars, dwarfs ; Parallaxes, trigonometric; Radial velocities ;
Stars, late-type ; Space velocities ; Stars, distances
Keywords: stars: low-mass - brown dwarfs - stars: kinematics and dynamics -
techniques: radial velocities
Abstract:
We present radial velocity measurements of a sample of L0-L8 dwarfs
observed with VLT/UVES and Keck/HIRES. We combine these measurements
with distance and proper motion from the literature to determine space
motions for 43 of our targets. We identify nine candidate members of
young moving groups, which have ages of 50-600Myr according to
their space motion.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 121 43 Radial velocities and space motions of our targets
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/A+A/440/1061 : Southern red high proper motion objects (Lodieu+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [2MASS]
7- 23 A17 --- 2MASS 2MASS designation (JHHMMSSss+DDMMSSs)
25- 28 A4 --- SpT MK spectral type
30- 33 F4.1 pc Dist Heliocentric distance
35- 38 F4.2 pc e_Dist rms uncertainty on Dist
40- 44 I5 mas/yr pmRA Proper motion along RA (pmRA*cosDE)
46- 47 I2 mas/yr e_pmRA rms uncertainty on pmRA
49- 53 I5 mas/yr pmDE Proper motion along DE
55- 56 I2 mas/yr e_pmDE rms uncertainty on pmDE
58- 62 F5.1 km/s RV Radial velocity
64- 66 F3.1 km/s e_RV rms uncertainty on RV
68- 72 F5.1 km/s Uvel U velocity in galactic frame
74- 76 F3.1 km/s e_Uvel rms uncertainty on Uvel
78- 83 F6.1 km/s Vvel V velocity in galactic frame
85- 87 F3.1 km/s e_Vvel rms uncertainty on Vvel
89- 93 F5.1 km/s Wvel W velocity in galactic frame
95- 97 F3.1 km/s e_Wvel rms uncertainty on Wvel
99 I1 --- Ref [1/5] References for distances and proper
motions (1)
101-121 A21 --- Com Comments
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Note (1): References for distances and proper motions as follows:
1 = Faherty et al. (2009AJ....137....1F 2009AJ....137....1F, and references therein)
2 = HIPPARCOS catalogue (Perryman et al., 1997, Cat. I/239)
3 = Lodieu et al. (2005, Cat. J/A+A/440/1061)
4 = Henry et al. (2006AJ....132.2360H 2006AJ....132.2360H)
5 = Costa et al. (2006AJ....132.1234C 2006AJ....132.1234C)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Mar-2010