J/A+A/590/A54ivo://CDS.VizieR/J/A+A/590/A54doi:10.26093/cds/vizier.35900054CDSHarrington D.Koenigsberger G.Olguin E.Berdyugina S.V.Lara B.,Moreno E.2017-06-21T08:21:47Z2016-05-10T08:14:00ZCDS support team

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

cds-question@unistra.frmultiple-starsradial-velocityline-intensitiesAlpha Virginis (Spica) is a B-type binary system whose proximity and brightness allow detailed investigations of the internal structure and evolution of stars undergoing time-variable tidal interactions. Previous studies have led to the conclusion that the internal structure of Spica's primary star may be more centrally condensed than predicted by theoretical models of single stars, raising the possibility that the interactions could lead to effects that are currently neglected in structure and evolution calculations. The key parameters in confirming this result are the values of the orbital eccentricity e, the apsidal period U, and the primary star's radius, R1. The aim of this paper is to analyze the impact that Spica's line profile variability has on the derivation of its orbital elements and to explore the use of the variability for constraining R1.2016A&A...590A..54Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/590/A54CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/590/A54https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/590/A54http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/590/A54https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/590/A54https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/590/A54http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/590/A54GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/590/A54/notdataalpha Vir SOFIN measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintn_ID[*]meta.notecharJDJulian date (JD-2451650)dtime.epochfloatPhaseOrbital phase (phi=4.014597)time.phasefloatRV1Radial velocity for the primary M1km/sspect.dopplerVelocintEW1Equivalent width for the primary0.1pmspect.line.eqWidthintRV2? velocity for the secondary M2km/sspect.dopplerVelocintnullableEW2? Equivalent width for the secondary0.1pmspect.line.eqWidthintnullable