J/A+A/469/285ivo://CDS.VizieR/J/A+A/469/285doi:10.26093/cds/vizier.34690285CDSVaz L.P.R.Andersen J.Claret A.2017-07-03T14:25:53Z2007-08-19T11:10:00ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsvisible-astronomymedium-band-photometryWe aim to determine absolute dimensions for the mid B-type eclipsing binary U Ophiuchi and compare the inferred ages and chemical compositions to those of other binary stars with masses near 5M_{sun}_. We determine masses, radii, logg, logT_eff_, and luminosities for the stars in U Oph from new radial velocities and uvby light curves. By improving the Wilson-Devinney code, we also derive precise apsidal-motion and light-time orbits of this triple system, using 353 times of minimum over 120 years. Finally, we compare the data for U Oph and similar systems with the predictions of stellar models.2007A&A...469..285Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/469/285CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/461/1077 : Radial velocities of DW Car (Southworth+, 2007)J/A+A/487/1095 : Radial velocities of QD Boo, VZ Hya, WZ Oph (Clausen+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/469/285https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/469/285http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/469/285https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/469/285https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/469/285http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/469/285GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/469/285/table5645 magnitude differences U Oph - HR 6367 obtained from 1992 to 1994 (instrumental system)JDJulian datedtime.epochdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintymagStroemgren y magnitudemagphot.mag;em.opt.Vfloatb-yStroemgren b-y colour indexmagphot.color;em.opt.B;em.opt.Vfloatm1Stroemgren m1 colour indexmagphot.colorfloatc1Stroemgren c1 colour indexmagphot.colorfloatbmagStroemgren b magnitudemagphot.mag;em.opt.BfloatvmagStroemgren v magnitudemagphot.mag;em.opt.BfloatumagStroemgren u magnitudemagphot.mag;em.opt.Ufloat