J/PASP/135/E4201ivo://CDS.VizieR/J/PASP/135/E4201doi:10.26093/cds/vizier.61363201CDSLi K.-X.Li K.Liu F.Gao X.Sun G.-Y.Wang X.Yin S.-P.2025-09-09T14:15:21Z2023-10-03T15:39:20ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsstellar-massesstellar-radiivisible-astronomyWe performed photometric, spectroscopic and orbital period investigations of ASASSN-V J015428.67+204247.2 (hereafter, J015428) for the first time. The light curves of VRI bands were obtained. Through the analysis of Wilson-Devinney program, J015428 was found as an A-subtype medium contact binary system with a low-mass ratio (q=0.129, f=26.8%). The atmospheric parameters were determined in spectroscopic analysis. In the orbital period investigations, we found that the orbital period of J015428 decreases at the rate of -7.13x10^-8^day/yr. And the long-term orbital period decrease is possibly due to angular momentum loss (AML). The absolute parameters was calculated with the photometric solutions and Gaia distance. Through the analyses of mass-radius and mass-luminosity diagrams of 54 contact binaries with the low mass ratios (0.096<=q<=0.15), the evolutionary states of low mass ratio binaries were investigated. The results by analyzing the energy transfer parameter indicated that energy transfer rate was a function of mass and bolometric luminosity ratio. We estimated the initial masses and the densities of two components and the age of the binary. The analysis of the orbital angular momentum supposed that J015428 may evolved from a short-period detached binary by AML. J015428 is in a stable contact stage at present.2023PASP..135e4201Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASP/135/E4201CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/412/1787 : Physical parameters of 62 eclipsing binaries (Deb+, 2011)J/AJ/143/122 : VR light curves of CK Boo (Yang+, 2012)J/AJ/146/35 : BVR light curves of DZ Psc (Yang+, 2013)J/AJ/164/202 : Extremely low mass ratio contact binaries I. (Li+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASP/135/E4201https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PASP/135/E4201http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PASP/135/E4201https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PASP/135/E4201https://vizier.iucaa.in/viz-bin/votable?-source=J/PASP/135/E4201http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PASP/135/E4201GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/PASP/135/E4201/tablea1 (Low mass ratio (0.096<=q<=0.15) contact binaries)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PASP/135/E4201/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/PASP/135/E4201/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PASP/135/E4201/tablea1?GETtext/xml+votable180.050000true235.751046743.26536530.0055555555555555566/689 759 1266 1314 1916 2310 2332 2726 2929 3707 4136 4666 4713 4947 5122 5201 5316 5962 6354 6742 7326 8248 8357 8480 9714 9922 11256 12314 14698 16409 18403 19075 19914 20046 20084 21139 21719 21969 22978 23772 25308 25567 26385 26495 26850 27269 27708 31455 31506 44981 47825 48918https://cdsarc.cds.unistra.fr/viz-bin/moc/J/PASP/135/E4201?format=asciiOpticaldefaultJ/PASP/135/E4201/tablea1Low mass ratio (0.096<=q<=0.15) contact binariesfFill-out factorarith.factorfloatT1Temperature of primaryKphys.temperatureintT2Temperature of secondaryKphys.temperatureintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharqMass ratiophys.massfloatPerPerioddtime.periodfloatM1Mass of primarysolMassphys.massfloatM2Mass of secondarysolMassphys.massfloatR1Radius of primarysolRadphys.size.radiusfloatR2Radius of secondarysolRadphys.size.radiusfloatL1Luminosity of primarysolLumphys.luminosityfloatL2Luminosity of secondarysolLumphys.luminosityfloatJspin/JorbSpin to orbital angular momentum ratiophys.angMomentumfloatRefReference (1)meta.ref;pos.framechar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainSimbadNameSimbad column added by the CDSmeta.idcharnullableJ/PASP/135/E4201/table4The eclipsing times and O-C values of ASASSN-V J015428.67+204247.2O-CO-C valuestat.fit.residualdoubleResResidualstat.fit.residualdoubleRefReference (1)meta.ref;pos.framecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian day (BJD-2400000)dtime.epochdoublee_BJDError on BJDdstat.errordoubleEEclipsing timetime.epochdouble