J/ApJ/679/1490ivo://CDS.VizieR/J/ApJ/679/1490doi:10.26093/cds/vizier.16791490CDSEaton J.A.Henry G.W.Odell A.P.2017-07-04T07:08:37Z2010-11-23T15:51:10ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starsradial-velocityline-intensitiesvisible-astronomybroad-band-photometryWe have derived new orbits for {zeta} Aur, 32 Cyg, and 31 Cyg with observations from the Tennessee State University (TSU) Automatic Spectroscopic Telescope, and used them to identify nonorbital velocities of the cool supergiant components of these systems. Our concurrent photometry detected the nonradial pulsations driven by tides (ellipsoidal variation) in both {zeta} Aur and 32 Cyg, at a level and phasing roughly consistent with simple theory to first order, although they seem to require moderately large gravity darkening. We point out two fundamental questions in the interpretation of these stars: (1) whether it is appropriate to model the surface brightness as gravity darkening and (2) whether much of the nonorbital velocity structure may actually represent changes in the convective flows in the stars' atmospheres.2008ApJ...679.1490Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/679/1490CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/679/1490https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/679/1490http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/679/1490https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/679/1490https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/679/1490http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/679/1490GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/679/1490/table2Spectroscopic DatarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleRVRadial velocity of the K star (1)km/sspect.dopplerVeloc;em.IR.KfloatEW1Equivalent width of H{alpha} absorption0.1nmspect.line.eqWidth;em.line.HalphafloatEW2Equivalent width of enhanced absorption in the blue wing of H{alpha}0.1nmspect.line.eqWidth;em.opt.BfloatHDHD identificationmeta.id;meta.mainintJ/ApJ/679/1490/table3Photometric DataHDHD identificationmeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleDBvar? Differential B band magnitudemagphot.mag;arith.difffloatnullableDVvar? Differential V band magnitudemagphot.mag;arith.difffloatnullableDBchk? Check star differential B band magnitudemagphot.mag;arith.difffloatnullableDVchk? Check star differential V band magnitudemagphot.mag;arith.difffloatnullable