J/AJ/167/192 TESS catalog of 1322 contact binary candidates (Ding+, 2024)
Detection of Contact Binary Candidates Observed By TESS Using the Autoencoder
Neural Network.
Ding Xu, Song Z., Wang C., Ji K.
<Astron. J., 167, 192 (2024)>
=2024AJ....167..192D 2024AJ....167..192D
ADC_Keywords: Stars, double and multiple; Novae; Optical; Binaries, eclipsing;
Binaries, spectroscopic
Keywords: Binary stars ; Eclipsing binary stars ; Contact binary stars
Abstract:
A contact binary may be the progenitor of a red nova that eventually
produces a merger event and have a cut-off period of around 0.2days.
Therefore, a large number of contact binaries is needed to search for
the progenitor of red novae and to study the characteristics of
short-period contact binaries. In this paper, we employ the Phoebe
program to generate a large number of light curves based on the
fundamental parameters of contact binaries. Using these light curves
as samples, an autoencoder model is trained, which can reconstruct the
light curves of contact binaries very well. When the error between the
output light curve from the model and the input light curve is large,
it may be due to other types of variable stars. The goodness of fit
(R2) between the output light curve from the model and the input light
curve is calculated. Based on the thresholds for global goodness of
fit (R2), period, range magnitude, and local goodness of fit (R2), a
total of 1322 target candidates were obtained.
Description:
We utilized light curves obtained from the Transiting Exoplanet Survey
Satellite (TESS). TESS observes each sector, which lasts for 27.4days,
over a designated section of the sky. These long and high-precision
light curves facilitate the study of periodic variable stars in them.
All selected targets with a 120s exposure time were downloaded from
the Mikulski Archive for Space Telescopes (MAST) database. Light
curves in sectors 1-66 observed by TESS are used to detect contact
binaries.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 206 1322 Catalog of contact binary star candidates
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
II/366 : ASAS-SN catalog of variable stars (Jayasinghe+, 2018-2020)
IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)
J/AJ/141/83 : Kepler Mission. I. Eclipsing binaries in DR1 (Prsa+, 2011)
J/AJ/151/68 : Kepler Mission. VII. Eclipsing binaries in DR3 (Kirk+, 2016)
J/AcA/66/405 : Galactic bulge eclipsing & ellipsoidal bin (Soszynski+, 2016)
J/MNRAS/465/4678 : 9380 contact binaries from CRTS VSC (Marsh+, 2017)
J/ApJS/237/28 : WISE catalog of periodic variable stars (Chen+, 2018)
J/ApJS/249/18 : The ZTF catalog of periodic variable stars (Chen+, 2020)
J/ApJS/254/10 : Compilation of W UMa stars (Latkovic+, 2021)
J/AJ/164/202 : Extremely Low Mass Ratio Contact Bin I. 10 systems (Li+, 2022)
J/ApJS/258/16 : TESS Eclipsing Binary stars. I. Sectors 1-26 (Prsa+, 2022)
http://archive.stsci.edu/missions-and-data/tess : TESS on MAST
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [TIC]
5- 14 I10 --- TIC [120016/1981434198] Tess Input Catalog identifier
16- 28 F13.9 deg RAdeg Right Ascension (J2000)
30- 42 F13.9 deg DEdeg Declination (J2000)
44- 54 F11.9 d Porb [0.16/1.2] Orbital period
56- 67 F12.10 d e_Porb [1e-05/0.003] Uncertainty in Porb
69- 79 F11.9 mag Range [0.1/1.25] Magnitude range in light curve
81-194 A114 --- Sector Sectors used
196-206 F11.9 --- R2 [0.99/1] Global goodness of fit
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 30-May-2024