J/A+A/591/A129ivo://CDS.VizieR/J/A+A/591/A129doi:10.26093/cds/vizier.35910129CDSMayer P.Harmanec P.Wolf M.Nemravova J.Prsa A.Fremat Y.,Zejda M.Liska J.Jurysek J.Honkova K.Masek M.2017-07-10T06:37:51Z2016-06-28T08:57:52ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsphotometryNew physical elements of the early B-type eclipsing binary V346 Cen are derived using the HARPS spectra downloaded from the ESO archive and also numerous photometric observations from various sources. A model of the observed times of primary and secondary minima that fits them best is a combination of the apsidal motion and an abrupt decrease in the orbital period from 6.322123d to 6.321843d (shortening by 24s), which occurred somewhere around JD 2439000. Assumption of a secularly decreasing orbital period provides a significantly worse fit. Local times of minima and the final solution of the light curve were obtained with the program PHOEBE. Radial velocities of both binary components, free of line blending, were derived via 2-D cross-correlation with a program built on the principles of the program TODCOR. The oxygen lines in the secondary spectra are weaker than those in the model spectra of solar chemical composition. Using the component spectra disentangled with the program KOREL, we find that both components rotate considerably faster than would correspond to the synchronization at periastron. The apside rotation known from earlier studies is confirmed and compared to the theoretical value.2016A&A...591A.129Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/591/A129CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/591/A129https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/591/A129http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/591/A129https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/591/A129https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/591/A129http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/591/A129GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/591/A129/tablea5V346 Cen green CCD differential SAAO photometry relative to HD 102152recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRJDReduced Julian date (HJD-2400000)dtime.epochdoubledmagDifferential SAAO green magnitude relative to HD 102152magphot.mag;arith.difffloate_dmagrms uncertainty on dmagmagstat.error;phot.magfloatJ/A+A/591/A129/tablea4V346 Cen Mt. John differential photometry relative to V916 CenrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRJDBReduced Julian date for B band (HJD-2400000)dtime.epochdoubledBmagDifferential B magnitude relative to V916 Cenmagphot.mag;em.opt.B;arith.difffloatRJDV? Reduced Julian date for V band (HJD-2400000)dtime.epochdoublenullabledVmag? Differential V magnitude relative to V916 Cenmagphot.mag;em.opt.V;arith.difffloatnullableRJDR? Reduced Julian date for R band (HJD-2400000)dtime.epochdoublenullabledRmag? Differential R magnitude relative to V916 Cenmagphot.mag;em.opt.R;arith.difffloatnullableJ/A+A/591/A129/tablea6V346 Cen differential photometry relative to CD-61 3157recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRJDB? Reduced Julian date for B band (HJD-2400000)dtime.epochdoublenullabledBmag? Differential B magnitude relative to CD-61 3157magphot.mag;em.opt.B;arith.difffloatnullableRJDV? Reduced Julian date for V band (HJD-2400000)dtime.epochdoublenullabledVmag? Differential V magnitude relative to CD-61 3157magphot.mag;em.opt.V;arith.difffloatnullableRJDR? Reduced Julian date for R band (HJD-2400000)dtime.epochdoublenullabledRmag? Differential R magnitude relative to CD-61 3157magphot.mag;em.opt.R;arith.difffloatnullableRJDIReduced Julian date for I band (HJD-2400000)dtime.epochdoubledImagDifferential I magnitude relative to CD-61 3157magphot.mag;em.opt.I;arith.difffloatJ/A+A/591/A129/tablea3V346 Cen du, dv, db, dy relative to HD 101466 from Gimenez et al. (1986A&AS...66...45G)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRJDReduced Julian date (HJD-2400000)dtime.epochdoubledumagDifferential u magnitude relative to HD 101466magphot.mag;arith.difffloatdvmagDifferential v magnitude relative to HD 101466magphot.mag;arith.difffloatdbmagDifferential b magnitude relative to HD 101466magphot.mag;arith.difffloatdymagDifferential y magnitude relative to HD 101466magphot.mag;arith.difffloatJ/A+A/591/A129/tablea2V346 Cen: photographic observations by O'Connell (1939, Publications of the Riverview College Observatory, 2, 5) observations from primary and secondary minima plus normal pointsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRJDReduced Julian date (HJD-2400000)dtime.epochdoublephmagPhotographic magnitudemagphot.mag;em.opt.VfloatNobsNumber of observations (1)meta.numberint