J/A+A/619/A32 CARMENES SB2 orbital parameters (Baroch+, 2018)
The CARMENES search for exoplanets around M dwarfs.
Nine new double-line spectroscopic binary stars.
Baroch D., Morales J.C., Ribas I., Tal-Or L., Zechmeister M., Reiners A.,
Caballero J.A., Quirrenbach A., Amado P.J., Dreizler S., Lalitha S.,
Jeers S.V., Lafarga M., Bejar V.J.S., Colome J., Cortes-Contreras M.,
Diez-Alonso E., Galadi-Enriquez D., Guenther E.W., Hagen H.-J., Henning T.,
Herrero E., Kuerster M., Montes D., Nagel E., Passegger V.M., Perger M.,
Rosich A., Schweitzer A., Seifert W.
<Astron. Astrophys. 619, A32 (2018)>
=2018A&A...619A..32B 2018A&A...619A..32B (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, spectroscopic ; Binaries, orbits
Keywords: binaries: spectroscopic - stars: late-type -
techniques: radial velocities - techniques: spectroscopic -
stars: fundamental properties - stars: low-mass
Abstract:
The CARMENES spectrograph is surveying ∼300 M dwarf stars in search
for exoplanets. Among the target stars, spectroscopic binary systems
have been discovered, which can be used to measure fundamental
properties of stars.
Using spectroscopic observations we determine the orbital and physical
properties of nine new double-line spectroscopic binary systems by
analysing their radial velocity curves.
We use two-dimensional cross-correlation techniques to derive the
radial velocities of the targets, which are then employed to determine
the orbital properties. Photometric data from the literature are also
analysed to search for possible eclipses and to measure stellar
variability, which can yield rotation periods.
Out of the 342 stars in the CARMENES sample, only 9 have been found to
be SB2s. We provide empirical orbital properties and minimum masses
for the sample of spectroscopic binaries, with periods ranging from
1.13 to 8000 days and eccentricities up to ∼0.54. Absolute masses are
also estimated from mass-luminosity calibrations, ranging between
∼0.1M☉ and ∼0.6M☉.
These new binary systems increase the number of double-line M dwarf
binary systems with known orbital parameters by 14%, and suggest that
low-mass binaries seem to have lower mass ratios than more massive
systems.
Description:
These tables list the radial velocities of the SB2 binary systems
detected with CARMENES which are used to compute their orbital and
physical properties. Besides, Table D1 is an effort to compile all
known M-dwarf SB2s with published orbital parameters. A total of 67
systems, 29 of which are eclipsing, have been found. Most of the
systems are taken from the SB9 catalogue of spectroscopic binaries
(Pourbaix et al., 2004, Cat. B/sb9), while additional systems have
been found in a bibliographic search. CARMENES spectroscopic binaries
are included in this table.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tabled1.dat 156 67 M-dwarf SB2s orbital parameters
refs.dat 50 41 References
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See also:
B/sb9 : SB9: 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-14)
J/A+A/577/A128 : CARMENES input catalog of M dwarfs I (Alonso-Floriano+, 2015)
J/A+A/597/A47 : CARMENES input catalog of M dwarfs II (Cortes-Contreras+ 2017)
J/A+A/609/A117 : CARMENES radial velocity curves of 7 M-dwarf (Trifonov+, 2018)
J/A+A/609/L5 : HD147379 b velocity curve (Reiners+, 2018)
J/A+A/612/A49 : 324 CARMENES M dwarfs velocities (Reiners+, 2018)
J/A+A/614/A122 : Radial-velocity of CARMENES M dwarfs (Tal-Or+, 2018)
J/A+A/615/A6 : Photospheric parameters of CARMENES stars (Passegger+, 2018)
J/A+A/621/A126 : CARMENES input catalogue of M dwarfs. IV. (Diez Alonso+ 2019)
Byte-by-byte Description of file: tabled1.dat
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Bytes Format Units Label Explanations
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1- 24 A24 --- Name Name of the system
26- 38 F13.7 d Per Period
40- 52 F13.7 d e_Per ? Period uncertainty
54- 66 F13.5 d T Time of periastron passage (JD)
71- 78 F8.5 d e_T ? Time of periastron passage uncertainty
80- 85 F6.4 --- e ? Eccentricity
87- 92 F6.4 --- e_e ? Eccentricity uncertainty
94- 99 F6.2 deg w ? Argument of the periastron
101-106 F6.2 deg e_w ? Argument of the periastron uncertainty
108-113 F6.2 km/s K1 Primary component radial velocity semi-amplitude
115-120 F6.2 km/s e_K1 ? Uncertainty on K1
122-127 F6.2 km/s K2 Secondary component radial velocity semi-amplitude
129-134 F6.2 km/s e_K2 ? Uncertainty on K2
136-141 F6.4 --- q Mass ratio
143-148 F6.4 --- e_q ? Mass ratio uncertainty
150-154 A5 --- Ref Bibliographic reference of the system,
in refs.dat file
156 I1 --- Flag [0/1]? Eclipsing binary system flag (1)
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Note (1): Eclipsing binary system flag as follows:
1 = Eclipsing system
0 = Non eclipsing system
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Ref Reference code
7- 25 A19 --- BibCode BibCode
27- 50 A24 --- Aut Author's name
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Acknowledgements:
David Baroch, baroch(at)ice.cat
(End) David Baroch [ICE, CSIC, IEEC Spain], Patricia Vannier [CDS] 23-Aug-2018