J/AJ/165/259ivo://CDS.VizieR/J/AJ/165/259doi:10.26093/cds/vizier.51650259CDSLiu N.-P.Qian S.-B.Liao W.-P.Huang Y.Yuan Z.-L.2024-11-06T20:17:20Z2024-01-29T07:18:55ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.freclipsing-binary-starsk-starsinfrared-photometryvisible-astronomyHigh-precision light curves were extracted from TESScut images. Together with APOGEE and LAMOST medium-resolution spectra, a joint study was made for six early K-type contact binary candidates selected unbiasedly with orbital periods around 0.268 day. It is found that all of them (RV-CVn, EK-Com, V384-Ser, V1038-Her, EH-CVn, and CSS_J125403.7+503945) are W-subtype shallow contact systems, though with different mass ratios (1/q=0.27-0.62). The effective temperature differences between the binary components are around a few hundred kelvins. The original definitions of the A and W subtypes were compared with the customarily used methods, which rely on the shape or photometric solutions of the light curves. The latter two methods are not always reliable; therefore, the radial velocity analysis is strongly recommended. Through a collection of all available K-type contact binaries with both photometric and spectroscopic measurements, it is found that almost all of them are W-subtype systems, except for a few objects that have nearly identical temperatures for binary components. This W-subtype phenomenon for K-type contact binaries should be further checked with more samples in the future. Finally, the physical parameters of the targets were determined with joint data analysis, and the multiplicity is discussed for these targets. Objects V384-Ser and RV-CVn are confirmed to very likely be triple systems from comprehensive analysis, while V1038-Her is a candidate of a triple system based on photometric and spectroscopic solutions.2023AJ....165..259Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/165/259CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)J/A+A/374/164 : BH Cas VRI differential magnitudes (Zola+, 2001)J/ApJ/629/1055 : Evolution of close binary systems (Yakut+, 2005)J/other/PASA/23.154 : BV light curves XY Leo, EE Cet, AQ Psc (Djurasevic+ 2006)J/AJ/133/1977 : Radial velocities of 10 close binaries (Pribulla+, 2007)J/A+A/465/943 : BVI and RV curves of 5 eclipsing binaries (Szalai+, 2007)J/AJ/136/586 : Radial velocities of 10 close binaries (Rucinski+, 2008)J/AJ/137/3655 : Radial velocities of 8 close binaries (Pribulla+, 2009)J/AJ/137/3646 : Radial velocities of 10 close binaries (Pribulla+, 2009)J/AJ/140/184 : RAVE double-lined spectroscopic binaries (Matijevic+, 2010)J/ApJ/723/1469 : Flux calibrations and WZ Oph photometry (Wilson+, 2010)J/MNRAS/412/1787 : Physical parameters of 62 eclipsing binaries (Deb+, 2011)J/A+A/525/A66 : 4 close binaries BVR light curves (Djurasevic+, 2011)J/MNRAS/430/2029 : Initial masses of WUMa type contact binaries (Yildiz+, 2013)J/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014)J/AJ/147/104 : Photometry & velocities of 1SWASPJ093010A and B (Koo+, 2014)J/MNRAS/437/185 : W UMa-type contact binaries ages and masses (Yildiz, 2014)J/AJ/147/130 : Minimum times of 7 eclipsing systems (Zasche+, 2014)J/AJ/152/57 : VRI light curves of 4 contact binaries (Djurasevic+, 2016)J/ApJ/859/140 : Multi-band magnitudes for W UMa EB* candidates (Chen+, 2018)J/MNRAS/479/5491 : Absolute parameters of 509 main-sequence stars (Eker+, 2018)J/AJ/156/90 : Catalog of APOGEE radial velocity std stars (Huang+, 2018)J/AJ/156/102 : TESS Input Catalog & Candidate Target List (Stassun+, 2018)J/AJ/158/106 : Eclips. binaries RVs from APOGEE spectra (Cunningham+, 2019)J/ApJ/871/63 : How to constrain M dwarf. II. Nearby binaries (Mann+, 2019)J/MNRAS/490/3806 : Exoplanets & variable stars, 47 Tuc field (Nardiello+, 2019)J/ApJS/244/27 : Radial velocity measurements in LAMOST-II (Wang+, 2019)J/MNRAS/493/5005 : TICs 167692429 and 220397947 triple stars (Borkovits+, 2020)J/AJ/159/189 : Eclipse timings for 9 contact binaries (Li+, 2020)J/other/RAA/20.163 : Contact binaries in LAMOST DR7 (Qian+, 2020)J/ApJS/247/50 : Late-type contact binaries in CSS DR1 (Sun+, 2020)J/ApJS/254/10 : Compilation of W UMa stars (Latkovic+, 2021)J/AJ/162/13 : Parameters estimation for 173 eclipsing binaries (Li+, 2021)J/AJ/161/221 : Photometry & spectroscopy of 4 binaries (Panchal+, 2021)http://archive.stsci.edu/ : Mikulski Archive for Space Telescopeshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/165/259https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/165/259http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/165/259https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/165/259https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/165/259http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/165/259GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/165/259/table1 (Basic information for the variables from the databases)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/165/259/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/165/259/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/165/259/table1?GETtext/xml+votable180.050000true205.075666728.30597220.0055555555555555566/8663 9335 10336 10351 11141 28149https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/165/259?format=asciiOpticalInfrareddefaultJ/AJ/165/259/table1Basic information for the variables from the databasesSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSystem namemeta.id;meta.maincharprimaryRAJ2000[12/16] Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[24/50] Degree of declination (J2000)pos.eq.dec;meta.mainVmag[11.8/14.3] Visual magnitudemagphot.mag;em.opt.VfloatPer[0.26/0.27] Perioddtime.perioddouble(J-H)[0.43/0.57] J-H colormagphot.color;em.IR.J;em.IR.HfloatTeff[4837/5045] Gaia DR2 effective temperatureKphys.temperature.effectiveintSpTLAMOST LRS spectral typesrc.spTypecharplx[1.59/5.46] Gaia DR2 parallaxemaspos.parallax.trigfloate_plx[0.02/0.14] Error on plxmasstat.error;pos.parallaxfloatplx-E[1.6/5.5] Gaia EDR3 parallaxemaspos.parallax.trigfloate_plx-E[0.01/0.07] Error on plx-Emasstat.errorfloatSectorTESS sector(s)obs.fieldcharNminNumber of minimum light times determined (table11)meta.numberintnullableJ/AJ/165/259/table11Newly determined minimum light timesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[58739/59009] Barycentric Julian Date, JD-2400000dtime.epochdoublee_BJD[3e-05/0.002] Uncertainty in BJDdstat.errordoubleNA[13/21] Number of data points usedmeta.numberintNameObject identifiermeta.id;meta.mainchar