J/MNRAS/380/1599ivo://CDS.VizieR/J/MNRAS/380/1599doi:10.26093/cds/vizier.73801599CDSQian S.-B.Yuan J.-Z.Liu L.He J.-J.Fernandez Lajus E.Kreiner J.M.2024-07-05T20:15:22Z2008-03-11T04:17:03ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsephemeridesUp to now, V382 Cyg and TU Mus are the only two discovered O-type overcontact binary stars with periods less than two days (P=1.8855 and 1.3873d). Both systems contain a visual companion. New eclipse times and analyses of orbital period variations of the two systems are presented. It is discovered that the periods of both binaries show cyclic oscillations with periods of 47.70 and 47.73yr, while they undergo continuous increases at rates of dP/dt=+4.4x10^-7^ and +4.0x10^-7^d/yr, respectively.2007MNRAS.380.1599Qhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/380/1599CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/380/1599https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/380/1599http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/380/1599https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/380/1599https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/380/1599http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/380/1599GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/MNRAS/380/1599/table4Times of light minimum of V382 CygrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublee_HJD? rms uncertainty on HJDdstat.error;time.epochfloatnullableMin[I II] First (I) or second (II) minimummeta.code;src.varnullableObsObservation type: CCD, Pe (photoelectric), Pg (photographic) or Vis (visual)meta.code;obscharEEphemeris E valuetime.phasedouble(O-C)1Observed minus computed value for linear ephemeris (1)dtime;arith.difffloat(O-C)2Observed minus computed value for quadratic ephemeris (2)dtime;arith.difffloatResResidualsdstat.fit.residualfloatJ/MNRAS/380/1599/table5Times of light minimum of TU MusrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublee_HJD? rms uncertainty on HJDdstat.error;time.epochfloatnullableMin[I II] First (I) or second (II) minimummeta.code;src.varnullableObsObservation type: CCD, Pe (photoelectric), Pg (photographic) or Vis (visual)meta.code;obscharEEphemeris E valuetime.phasedouble(O-C)1Observed minus computed value for linear ephemeris (1)dtime;arith.difffloat(O-C)2Observed minus computed value for quadratic ephemeris (2)dtime;arith.difffloatResResidualsdstat.fit.residualfloat