J/A+A/403/637ivo://CDS.VizieR/J/A+A/403/637doi:10.26093/cds/vizier.34030637CDSCsizmadia Sz.Biro I>B>Borkovits T.2017-06-27T06:38:32Z2003-06-01T12:27:05ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsvisible-astronomybroad-band-photometrykron-cousins-photometryHere we present the first Johnson-Cousins VR_C_ light curves of the over-contact binary star GSC 3822-1056. A period study and the light curve solution are also given. An extremely high rate of period increase +11.6sec/century was found. The origin of this period change can be: (i) partly covered light-time effect due to the orbital motion around the mass center of a possible third body; (ii) mass transfer between the components. The light curve was solved by the 1998 Wilson-Devinney Code. We examined the light curve with and without third light. Both solutions yielded a contact configuration with high temperature difference between the components. Despite the high degree of the contact (f=0.57), the temperature difference between the components {Delta}T=T_primary_-T_secondary_=1045K. The high mass-ratio of the system and its other unusual properties suggest that GSC 3822-1056 may be a recently formed contact binary.2003A&A...403..637Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/403/637CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/403/637https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/403/637http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/403/637https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/403/637https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/403/637http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/403/637GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/403/637/table2aGSC 3822-1056 Johnson V light curverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleVmagJohnson V magnitude of GSC 3822-1056magphot.mag;em.opt.VfloatJ/A+A/403/637/table2bGSC 3822-1056 Cousins R light curverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleRmagCousins R magnitude of GSC 3822-1056magphot.mag;em.opt.RfloatJ/A+A/403/637/table2cGSC 3822-1056 relative magnitude to GSC 3822-0070recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleDmagUnfiltered magnitude of GSC 3822-1056 relative to GSC 3822-0070magphot.mag;arith.difffloate_DmagScatter of measurement of Dmagmagstat.errorfloat