J/A+A/626/A31 Radial velocities of nearby stars (Sperauskas+, 2019)
Spectroscopic orbits of nearby stars.
Sperauskas J., Deveikis V., Tokovinin A.
<Astron. Astrophys. 626, A31 (2019)>
=2019A&A...626A..31S 2019A&A...626A..31S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, double and multiple ; Stars, M-type ;
Stars, K-type ; Radial velocities
Keywords: binary: close
Abstract:
We observed stars with variable radial velocities to determine their
spectroscopic orbits.
Velocities of 132 targets taken over a time span reaching 30 years are
presented. They were measured with the correlation radial velocity
spectrometers (1913 velocities) and the new VUES echelle spectrograph
(632 velocities), with typical accuracy of 0.5 and 0.2km/s,
respectively.
We derived spectroscopic orbits of 57 stars (including 53 first-time
orbits), mostly nearby dwarfs of spectral types K and M. Their periods
range from 2.2 days to 14 years, some of those are Hipparcos
astrometric binaries. Comments on individual objects are provided.
Many stars belong to hierarchical systems containing three or more
components, including 20 new hierarchies resulting from this project.
The preliminary orbit of the young star HIP 47110B has a large
eccentricity e=0.47 despite short period of 4.4d; it could be still
circularizing.
Our results enrich the data on nearby stars and contribute toa better
definition of the multiplicity statistics.
Description:
We observed 132 stars with variable radial velocities over a time span
reaching 30 years. Spectroscopis orbits were derived for 57 stars,
mostly nearby dwarfs of spectral types K and M with some beeing
Hipparcos astrometric binaries. Many stars belong to hierarchical
systems containing three or more components, including 20 new
hierarchies resulting from this project.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 90 132 Object list
table2.dat 46 2544 Individual radial velocity measurements
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See also:
J/ApJS/235/6 : Updated multiple star catalog (MSC) May 2018 (Tokovinin, 2018)
J/A+A/596/A116 : Radial velocities of K-M dwarfs (Sperauskas+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Object identification. HIP numbers when
available, HD, BD or GJ as the second choice
14- 15 I2 h RAh Right ascension (J2000)
17- 18 I2 min RAm Right ascension (J2000)
20- 24 F5.2 s RAs Right ascension (J2000)
26 A1 --- DE- Declination sign (J2000)
27- 28 I2 deg DEd Declination (J2000)
30- 31 I2 arcmin DEm Declination (J2000)
33- 36 F4.1 arcsec DEs Declination (J2000)
38- 42 F5.2 mag Vmag V magnitude
44- 49 F6.2 mas varpi Parallax
52- 56 A5 --- SpType MK spectral type
60- 61 A2 --- VType Variability type (1)
64- 65 I2 --- NRV Number of RV measurements
67- 71 I5 d DeltaT Time span of RV measurements
73- 79 F7.2 km/s Weighted mean velocity (2)
81- 85 F5.2 km/s e_ ?=- rms of mean velocity
87- 90 F4.1 --- chi2 ?=- Statistic, χ2/(N-1)
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Note (1): Variability type as follows:
C = constant
V = variable
s2 = double-lined
S1 = single-lined binary
S2 = double-lined binary
S3 = triple-lined binary
Note (2): For binaries with orbits, is the center-of-mass velocity.
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- Name Object identification. HIP numbers when
available, HD, BD or GJ as the second choice
14- 22 F9.3 d JD Observation date (JD-2400000)
24- 30 F7.2 km/s RV Heliocentric radial velocity
33- 36 F4.2 km/s e_RV Uncertainty on radial velocity
39 A1 --- Inst [CV] Instrument code (1)
46 A1 --- Comp [abc] Spectroscopic component identification
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Note (1): Instrument code as follows:
C = Coravel
V = VUES
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Acknowledgements:
Julius Sperauskas, julius.sperauskas(at)ff.vu.lt
(End) Julius Sperauskas [Vilnius Univ. Obs.], Patricia Vannier [CDS] 02-Jun-2019