J/AJ/164/194ivo://CDS.VizieR/J/AJ/164/194doi:10.26093/cds/vizier.51640194CDSVolkov I.M.Kravtsova A.S.2023-01-16T09:14:14Z2022-12-13T08:56:20ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomybroad-band-photometryWe report long-term UBVRIRcIc photometry of the highly eccentric 12.04 day detached eclipsing binary V490Sct (V=13.1, B9.5+A0,e=0.40), which we use to determine its relative and absolute parameters. The absolute masses, radii, and temperatures are MA=2.33{+/-}0.07M{sun}, RA=1.90{+/-}0.04R{sun}, and TA=9960{+/-}60K for the primary and MB=2.23{+/-}0.07M{sun}, RB=1.86{+/-}0.04R{sun}, and TB=9700{+/-}80K for the secondary. The system displays a slow periastron advance that is dominated by General Relativity (GR). Our measurement, {omega}=0.86deg/century, is 32% less then the expected rate, {omega}=1.24deg/century, which has an 83% contribution from GR. A comparison with current stellar evolution models shows a good match to the measured properties at an age of about 130Myr and Solar abundance. The photometric parallax of the system {pi}=0.73{+/-}0.04mas, matches the GAIA DR2 value, {pi}=0.76{+/-} 0.04mas.2022AJ....164..194Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/194CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/gcvs : General Catalogue of Variable Stars (Samus+, 2007-2017)J/ApJ/469/355 : Teff, B-V and BC relation (Flower, 1996)J/A+AS/141/371 : Low-mass stars evolut. tracks & isochrones (Girardi+, 2000)J/A+A/424/919 : Stellar models grids. Z=0.02, M=0.8 to 125 (Claret, 2004)J/ApJ/836/177 : RVs and R-band obs. of the EB* V541 Cyg (Torres+, 2017)J/ApJS/235/41 : Galactic EB stars eccentric orbits based on ETDs (Kim+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/164/194https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/164/194http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/164/194https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/164/194https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/164/194http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/164/194GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/AJ/164/194/table1Observation logrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsIDObservatory identifiermeta.id;instr.obstycharTelTelescope usedmeta.id;instr.telcharBandPhotometric passbandinstr.bandpasscharEquipReceiving equipmentinstr.setupcharJ/AJ/164/194/table7UBVRRcIIc photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFiltFilter used (UBVRI)instr.setup;instr.filtercharHJD[2453239/2459394] Heliocentric Julian Datedtime.epochdoublemag[12.1/14.7] Apparent magnitude in Filtermagphot.magfloat