J/AJ/158/189ivo://CDS.VizieR/J/AJ/158/189doi:10.26093/cds/vizier.51580189CDSFekel F.C.Henry G.W.Sowell J.R.2020-01-14T11:03:15Z2020-01-14T11:52:19ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsvariable-starsradial-velocityvisible-astronomybroad-band-photometryFrom numerous radial velocities as well as Johnson B and V differential photoelectric photometry, we have determined the orbital elements and other properties of the single-lined triple system HD 126516. This system consists of a narrow-lined F5 V star and an unseen M dwarf companion in a 2.1241 day circular orbit. The small, low-mass secondary produces detectable eclipses of the primary, and that pair has been given the variable star name V349 Vir. Variations of the center-of-mass velocity of this short-period system have an orbital period of 702.7 days or 1.92 yr and an eccentricity of 0.36. The third star is likely a K or M dwarf. From an analysis of our photometry, we conclude that the primary of HD 126516 is not a {gamma} Dor variable. Comparison with evolutionary tracks indicates that the primary is slightly metal-poor and has an age of 2.5 Gyr. The projected rotational velocity of the primary is very low, just 4 km/s, which is 10 times less than its synchronous rotational velocity. Thus, either that component's rotation is extremely non-synchronous or the inclinations of the rotational and orbital axes are very different, and so the primary has a very large spin-orbit misalignment. Because of the moderate age of the system and the fact that its orbit is already circularized, neither situation is expected theoretically.2019AJ....158..189Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/158/189CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/other/IBVS/5863 : 79th Name-List of Variable Stars (Kazarovets+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/158/189https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/158/189http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/158/189https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/158/189https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/158/189http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/158/189GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/158/189/table2Radial velocity observations of HD 126516recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[51738.711/58141.911] Heliocentric Julian Date, HJD-2400000dtime.epochdoubleRV[-63.5/14.6] Observed radial velocitykm/sphys.veloc;pos.heliocentricfloatO-C[-0.86/0.69] Velocity residualkm/sstat.fit.residual;phys.velocfloatPhase-L[0.003/0.997] Fractional phase of long period orbittime.phasefloatRV-L[-30.49/-19.14] Radial velocity of long period orbitkm/sphys.veloc;pos.heliocentricfloatPhase-S[0.003/0.992] Fractional phase of short period orbittime.phasefloatRV-S[-34.43/34.31] Radial velocity of short period orbitkm/sphys.veloc;pos.heliocentricfloatSourceObservatory source (1)meta.id;instr.obstycharJ/AJ/158/189/table4Photometric observations of HD 126516recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJD[52635.0308/54282.7076] Reduced Heliocentric Julian Date, HJD-2400000dtime.epochdoublePhase[0.0002/0.9996] Fractional orbital phase (1)time.phasefloatVarV[1.86/1.929]? Variable-Comparison differential mag in V (2)magphot.mag;arith.difffloatnullableVarB[1.821/1.883]? Variable-Comparison differential mag in B (2)magphot.mag;arith.difffloatnullable