2025ApJ...986...19W

Query : 2025ApJ...986...19W

2025ApJ...986...19W - Astrophys. J., 986, 19 (2025/June-2)

Using Machine Learning Method for Variable Star Classification Using the TESS Sectors 1-57 Data.

WANG L.-H., LI K., GAO X., GUO Y.-N. and SUN G.-Y.

Abstract (from CDS):

The Transiting Exoplanet Survey Satellite is a wide-field all-sky survey mission designed to detect Earth-sized exoplanets. After over 4 yr of photometric surveys, data from sectors 1-57, including approximately 1,050,000 light curves with a 2 minute cadence, were collected. By crossmatching the data with Gaia's variable star catalogue, we obtained labeled data sets for further analysis. Using a random forest classifier, we performed classification of variable stars and designed distinct classification processes for each subclass: 6770 EA, 2971 EW, 980 CEP, 8347 DSCT, 457 RRab, 404 RRc, and 12,348 ROT were identified. Each variable star was visually inspected to ensure the reliability and accuracy of the compiled catalog. Subsequently, we ultimately obtained 6046 EA, 3859 EW, 2058 CEP, 8434 DSCT, 482 RRab, 416 RRc, and 9694 ROT, and a total of 14,092 new variable stars were discovered.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Variable stars - Surveys - Catalogs - Astronomy data analysis

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ASAS J224709-6920.6 SB* 22 47 08.7267047784 -69 20 44.545210656   12.27 11.306 10.78 9.810 K6Ve 25 0

Query : 2025ApJ...986...19W

Basic data :
ASAS J224709-6920.6 -- Spectroscopic Binary
Other object types: otypes_help 		* (TYC,RAVE,...), SB* (2014ApJ), Er* (2020AJ), PM* (2018yCat), Ro* (2012AcA), V* (ASAS), X (1RXS), NIR (2MASS)
ICRS coord. (ep=J2000) : 		22 47 08.7267047784 -69 20 44.545210656 (Optical) [ 0.0300 0.0307 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		22 43 37.2237557105 -69 36 31.227463249 [ 0.0300 0.0307 90 ]
Gal coord. (ep=J2000) : 		317.6101634805323 -44.0714399945808 [ 0.0300 0.0307 90 ]
Proper motions mas/yr : 		64.903 -63.866 [0.037 0.038 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 44.5 [0.2] / z(~) 0.000148 [0.000001] / cz 44.50 [0.20]
   A 2014ApJ...788...81M
Parallaxes (mas): 		19.5687 [0.0368] A 2020yCat.1350....0G
Spectral type: 		K6Ve C 2006A&A...460..695T
Fluxes (8) :
B 12.27 [0.18] D 2000A&A...355L..27H
V 11.306 [0.055] C 2012AcA....62...67K
R 10.78 [0.06] E 2009yCat.1315....0Z
G 10.815890 [0.002890] C 2020yCat.1350....0G
I 9.810 [0.024] C 2012AcA....62...67K
J 8.888 [0.023] C 2003yCat.2246....0C
H 8.30 [0.07] C 2003yCat.2246....0C
K 8.087 [0.029] C 2003yCat.2246....0C
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 2 : 2925 Display criteria :

Identifiers (10) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

TYC 9337-2134-1 RAVE J224708.7-692045 UCAC3 42-253254 Gaia DR1 6384783139671454080
ASAS J224709-6920.6 1RXS J224709.4-692041 Gaia DR2 6384783143967384832
2MASS J22470872-6920447 TIC 238853963 Gaia DR3 6384783143967384832

References (25 between 1850 and 2026) (Total 25)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 6    Distance : 4    Var : 3    Rot : 3    Fe/H : 3    Plx : 4    PM : 2    SpT : 3   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Link by name to the catalogue in VizieR :

TYC 9337-2134-1 2MASS J22470872-6920447 RAVE J224708.7-692045 1RXS J224709.4-692041 UCAC3 42-253254
Gaia DR2 6384783143967384832 Gaia DR3 6384783143967384832 Gaia DR1 6384783139671454080

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