J/other/NewA/36.ivo://CDS.VizieR/J/other/NewA/36.32CDSWang D.Zhang L.Han X.L.Agerer F.Pi Q.Wang S.2017-06-26T11:49:16Z2015-08-24T15:01:24ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomyphotometryWe present the first multi-color VRI CCD light curves of a short-period eclipsing binary star v441 Lac in this paper. We obtained our light curves on Oct. 4 and 8, 2013 at Xinglong station of National Astronomical Observatories, China. We updated the ephemeris of V441 Lac based on three new minima derived by our new observational data together with previously available light curve minima. By fitting the O-C (observed minus calculated) values of the minima, we found that the orbital period of V441 Lac exhibits an increasing trend of View the dP/dt=5.67(0.35)x10^-7^days/year, which might be explained by mass transfer from the secondary component to the primary one, or angular momentum exchange by magnetic activities. We also obtained the photometric orbital parameters with the Wilson & Devinney program. Our final result shows that the V441 Lac system is a semi-detached binary with the secondary component filling roche lobe.2015NewA...36...32Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/NewA/36.32CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/NewA/36.32https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/NewA/36.32http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/NewA/36.32https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/NewA/36.32https://vizier.iucaa.in/viz-bin/votable?-source=J/other/NewA/36.32http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/NewA/36.32GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/other/NewA/36.32/table4The minimum times of V441 LacrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date of the minimum timesdtime.epochdoubleCycle[-1281/15397.5] Cycleobs.proposal.cyclefloat(O-C)1[-0.011/0.012] Residual of the linear fitdstat.fit.residualfloat(O-C)2[-0.009/0.008] Residual of the polynomial fitdstat.fit.residualfloatSource[1/14] Reference (1)meta.ref;pos.frameintJ/other/NewA/36.32/table2The photometric data of V R I bands of V441 LacrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD-VHeliocentric Julian Date of V band observationdtime.epochdoubledVmagDifferential B band magnitudemagphot.mag;em.opt.B;arith.difffloatHJD-R? Heliocentric Julian Date of R band observationdtime.epochdoublenullabledRmag? Differential V band magnitudemagphot.mag;em.opt.V;arith.difffloatnullableHJD-IHeliocentric Julian Date of I band observationdtime.epochdoubledImagDifferential R band magnitudemagphot.mag;em.opt.R;arith.difffloat