J/A+A/692/A168 8 semi-detached eclipsing binaries radial velocities (Lei+, 2024)
A photometric and spectroscopic study of eight semi-detached eclipsing binaries.
Lei Y., Zhou G., Wang L., Li G., Li K., Yi T.
<Astron. Astrophys. 692, A168 (2024)>
=2024A&A...692A.168L 2024A&A...692A.168L (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Photometry ; Radial velocities
Keywords: binaries: close - binaries: eclipsing
Abstract:
Semi-detached eclipsing binaries offer an exceptional opportunity to
validate the evolutionary models of interacting binaries.
This entails determining the absolute parameters and evaluating the
evolutionary status of the binary components through simultaneous
analysis of both light and radial velocity curves. The Transiting
Exoplanet Survey Satellite (TESS) provides high-precision light
curves, while the Large Sky Area Multi-Object Fibre Spectroscopic
Telescope Medium-Resolution spectroscopic Survey (LAMOST MRS) offers
multiple epoch observations. The fusion of these data arises the
chance to derive precise parameters for binaries.
The aim of this study is to estimate the absolute parameters of
semi-detached binary components, offer potential explanations for
their evolutionary status, and investigate the long-term variations of
orbital periods to explore their underlying causes.
By cross-matching the eclipsing binary catalogue from TESS with that
from LAMOST MRS, semi-detached eclipsing binaries with radial
velocities coverage spanning more than 0.3 phases were authenticated.
The absolute parameters for these systems were determined by
simultaneous modelling of light curves and radial velocities using the
Wilson-Devinney programme. Additionally, the secular orbital
variations were further analysed using O-C curves.
Eight semi-detached eclipsing binaries have been identified. Among
them, seven contain primary stars situated within the main-sequence
band, while their secondaries are all in evolved stages. This suggests
that these systems likely originated as detached binaries and have
undergone a reversal of the mass ratio. However, TIC 428257299 is an
exception where the primary is Roche lobe-filling, and its secondary
has experienced mass loss events. Additionally, TIC 8677671 and TIC
318217844 demonstrate secular cyclical variations of orbital periods.
Specifically, for TIC 8677671, the cyclical change could result from
magnetic activity or a third body which is likely to be compact, with
a mass of at least 2.97 solar mass.
Description:
Radial velocities based on the Large Sky Area Multi-Object Fibre
Spectroscopic Telescope Medium-Resolution spectroscopic Survey for
eight semi-detached eclipsing binaries.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 38 8 List of studied stars
rv.dat 48 261 Radial velocity data (table B1)
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Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- TIC TESS Input Catalog identifier (TIC NNNNNNN)
16- 17 I2 h RAh Simbad right ascension (J2000)
19- 20 I2 min RAm Simbad right ascension (J2000)
22- 26 F5.2 s RAs Simbad right ascension (J2000)
28 A1 --- DE- Simbad declination sign (J2000)
29- 30 I2 deg DEd Simbad declination (J2000)
32- 33 I2 arcmin DEm Simbad declination (J2000)
35- 38 F4.1 arcsec DEs Simbad declination (J2000)
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Byte-by-byte Description of file: rv.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- TIC TESS Input Catalog identifier (TIC NNNNNNN)
16- 25 F10.5 d Time Barycentric Julian date (BJD-2457000)
27- 32 F6.1 km/s RV1 Radial velocity of primary
34- 36 F3.1 km/s e_RV1 Radial velocity error of primary
38- 43 F6.1 km/s RV2 ? Radial velocity of secondary
45- 48 F4.2 km/s e_RV2 ? Radial velocity error of secondary
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Acknowledgements:
Yajuan Lei, yjlei(at)bao.ac.cn
(End) Patricia Vannier [CDS] 13-Nov-2024