J/MNRAS/454/2344ivo://CDS.VizieR/J/MNRAS/454/2344doi:10.26093/cds/vizier.74542344CDSPugh T.Gray D.F.Griffin R.F.2024-08-15T20:15:56Z2018-01-22T12:56:36ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starsradial-velocityRadial-velocity observations spanning more than a century are used to produce a reliable orbit of the {delta} Sagittae system. We find an orbital period of 3703.7+/-1.5 d and a semi-amplitude of 7.73+/-0.05 km/s. In addition, we find quasi-periodic variations with time-scales in the range of 550-750 d and a typical amplitude of 1 km/s. The phase and amplitude are both irregular, sometimes changing very abruptly. We consider pulsation, rotational modulation and convection as possible causes of the variations, finally favouring convection.2015MNRAS.454.2344Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/454/2344CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/145/41 : Radial velocities of 33 spectroscopic binaries (Katoh+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/454/2344https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/454/2344http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/454/2344https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/454/2344https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/454/2344http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/454/2344GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/MNRAS/454/2344/table2Radial VelocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochdoublePhasePhasetime.phasefloatRVRadial velocitykm/sphys.veloc;pos.heliocentricfloatO-CResidual radial velocitykm/sstat.fit.residual;spect.dopplerVelocfloatSource[1/16] Source (1)meta.codeint