J/A+A/374/638ivo://CDS.VizieR/J/A+A/374/638doi:10.26093/cds/vizier.33740638CDSDjurasevic G.Zakirov M.Eshankulova M.Erkapic S.2018-02-01T11:50:43Z2001-07-22T09:47:03ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomybroad-band-photometryThe present study deals with the problem of the estimation of the orbital and physical parameters for the EB-type eclipsing binary RY Sct, based on the interpretation of new photometric U B V R observations. The light curves obtained at the Maidanak Observatory during 1979-94 show a slight asymmetry around the secondary minima and a small difference in the height of the successive maxima. The light curves are analysed in the framework of the Roche computer model (Djurasevic, 1992Ap&SS.196..241D) by applying the inverse-problem method (Djurasevic, 1992Ap&SS.197...17D) based on Marquardt's (1963, J. Soc. Ind. Appl. Math. 11(2), 431) algorithm. The analysis shows that RY Sct system is in an overcontact configuration (f_over_~33%) with q=m_2_/m_1_=m_cool_/m_hot_=3.3 and i~84.3{deg}, generating total-annular eclipses. The basic parameters of the system and of the active region are estimated for all individual U, B, V and R light curves. Our results suggested a mass exchange between the components and mass loss through the outer Lagrangian point L_3_. This could be taken as a possible mechanism in the formation of the circumstellar envelope of toroidal form lying in the orbital plane of the system.2001A&A...374..638Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/374/638CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/343/894 : RZ Tau UBVR photometry (Djurasevic+ 1999)J/PAZh/25/764 : Multicolor photometry of RY Sct (Antokhina+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/374/638https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/374/638http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/374/638https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/374/638https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/374/638http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/374/638GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/A+A/374/638/observUBVR data for RY SctrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublePhase[0-1] Orbital phasetime.phasefloatUmag? U magnitudemagphot.mag;em.opt.UfloatnullableBmag? B magnitudemagphot.mag;em.opt.BfloatnullableVmag? V magnitudemagphot.mag;em.opt.VfloatnullableRmag? R magnitudemagphot.mag;em.opt.Rfloatnullable