J/A+A/408/611ivo://CDS.VizieR/J/A+A/408/611doi:10.26093/cds/vizier.34080611CDSJanik J.Harmanec P.Lehmann H.Yang S.Bozic H.Ak H.Hadrava P.,Eenens P.Ruzdjak D.Sudar D.Hubeny I.Linnell A.P.2017-07-05T06:59:13Z2006-12-01T17:14:01ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsspectroscopic-binary-starsvisible-astronomybroad-band-photometryAn analysis of new spectroscopic and photoelectric UBV observations, satisfactorily covering the whole orbital period of V436 Per, together with existing data allowed us to improve the knowledge of the basic physical characteristics of the binary and its components. In several aspects, our new results differ from the findings of Paper I (Harmanec et al., 1997, Cat. <J/A+A/319/867>) of this series: In particular, we found that it is the star eclipsed in the secondary minimum which is slightly more massive and larger than the optical primary. We also conclude that the apsidal advance -- if present at all -- is much slower than that estimated in a previous study. The orbital period might be increasing by 0.28 s per year but also this finding is very uncertain and needs verification by future observations. It is encouraging to note that two completely independent sets of programs for light-curve solutions lead to identical results. A notable finding is that both binary components rotate with very similar -- if not identical -- rotational periods of 1.45d and 1.40d, much shorter than what would correspond to a 10.9d spin-orbit synchronization period at periastron. Rapid line-profile changes reported earlier could not be confirmed from new, dedicated series of high-resolution and S/N spectra.2003A&A...408..611Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/408/611CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/319/867 : V436 Persei = 1 Persei byBV photometry (Harmanec+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/408/611https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/408/611http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/408/611https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/408/611https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/408/611http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/408/611GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/408/611/refsNumerical code identifying sources of datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCodeSource codemeta.bibintBandBandmeta.code;instr.filtercharAutAuthor's namemeta.bib.authorcharBibCodeBibCodemeta.bib.bibcodecharComCommentsmeta.notecharJ/A+A/408/611/table4V436 Per (Johnson UBV photometry)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoublemagMeasured V436 Per magnitude in color bandmagphot.magfloatw_magWeight assigned to individual datastat.weightfloatr_magNumerical code identifying sources of data, in refs.dat filemeta.bibintBand[UBV] Johnson UBV colormeta.code;instr.filterchar