J/MNRAS/527/521 SB2s in LAMOST-MRS (Kovalev+, 2024)
Detection of 12 426 SB2 candidates in the LAMOST-MRS, using a binary spectral
model.
Kovalev M., Zhou Z., Chen X., Han Z.
<Mon. Not. R. Astron. Soc. 527, 521-530 (2024)>
=2024MNRAS.527..521K 2024MNRAS.527..521K (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, spectroscopic ; Binaries, orbits
Keywords: techniques: spectroscopic - binaries: spectroscopic -
stars: individual: J080107.63+384345.6
Abstract:
We use an updated method for the detection of double-lined
spectroscopic binaries (SB2s) using vsini values from spectral fits.
The method is applied to all spectra from Large sky Area Multi-Object
fiber Spectroscopic Telescope Medium Resolution Survey. Using this
method, we detect 12426 SB2 candidates, where 4321 are already known
and 8105 are new discoveries. We check their spectra manually to
minimize possible false positives. We also detect several cases of
contamination of the spectra by solar light. Additionally, for
candidates with multiple observations, we compute mass ratios with
systemic velocities and determine Keplerian orbits. We present an
updated catalogue of all SB2 candidates together with additional
information for some of them in separate data tables.
Description:
We have used an updated method for the detection of SB2s using vsini
values from spectral fits. The method is applied to all spectra from
LAMOST-MRS. This method found 12426 (8105 new) SB2 candidates in the
LAMOST-MRS. The updated method allows one to select many SB2
candidates, including ones with zero {DELTA}RV between components, if
they have different spectra. We present a determination of the mass
ratios and orbits for a subset of SB2 candidates with multiple
observations.
Table B1 list of SB2 candidates with GaiaDR3 source_id, table C1 table
with mass ratios and systemic velocities derived using Wilson method
and table C2 derived circular and Keplerian orbits using GLS code
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tableb1.dat 43 12426 Catalogue of SB2 candidates in LAMOST-MRS
tablec1.dat 65 1347 Dynamical mass ratios and systemic velocities
tablec2.dat 233 612 Orbital parameters from GLS
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See also:
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
V/156 : LAMOST DR7 catalogs (Luo+, 2019)
Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
3- 21 A19 --- Star Name with encoded sky position RA,DEC,
JHHMMSS.ss+DDMMSS.s
25- 43 I19 --- GaiaDR3 Gaia DR3 source_id
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Byte-by-byte Description of file: tablec1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Star Name with encoded sky position RA,DEC,
JHHMMSS.ss+DDMMSS.s
21- 27 F7.2 km/s Vbc Systemic velocity
29- 32 F4.2 km/s e_Vbc Error for systemic velocity
34- 39 F6.3 --- Q Mass ratio
41- 45 F5.3 --- e_Q Error for mass ratio
47- 65 I19 --- GaiaDR3 Gaia DR3 source_id
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Byte-by-byte Description of file: tablec2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Star Name with encoded sky position RA,DEC,
JHHMMSS.ss+DDMMSS.s
21- 22 I2 --- Nsp Number of used spectra
24- 34 F11.6 d Psin Period for circular orbit
36- 45 E10.2 d e_Psin Error of period for circular orbit
47- 56 F10.6 km/s Ksin Semiamplitude for circular orbit
58- 66 F9.6 km/s e_Ksin Error of semiamplitude for circular orbit
68- 79 F12.6 d T0sin Conjunction time for circular orbit
81- 90 E10.2 d e_T0sin Error of conjunction time for circular orbit
92-102 F11.6 km/s Csin Systemic velocity for circular orbit
104-112 F9.6 km/s e_Csin Error of systemic velocity for circular orbit
114-124 F11.6 d Pkep Period for Keplerian orbit
127-135 E9.4 d e_Pkep ? Error of period for Keplerian orbit
136 A1 --- nePkep [I] I for infinity
138-147 F10.6 km/s K Semiamplitude for Keplerian orbit
149-157 F9.6 km/s e_K ? Error of semiamplitude for Keplerian orbit
158 A1 --- neK [I] I for infinity
160-170 F11.6 km/s RV0 Systemic velocity for Keplerian orbit
172-179 F8.6 km/s e_RV0 ? Error of systemic velocity for
Keplerian orbit
180 A1 --- neRV0 [I] I for infinity
181-192 F12.6 d T0 Periastron passage for Keplerian orbit
195-203 E9.4 d e_T0 ? Error of periastron passage for
Keplerian orbit
204 A1 --- neT0 [I] I for infinity
206-209 F4.2 --- ecc Eccentricity for Keplerian orbit
211-213 I3 deg omega Periastron argument for Keplerian orbit
215-233 I19 --- GaiaDR3 Gaia DR3 source_id
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Acknowledgements:
Mikhail Kovalev, mikhail.kovalev(at)ynao.ac.cn
(End) Patricia Vannier [CDS] 09-May-2024