J/AJ/148/114ivo://CDS.VizieR/J/AJ/148/114doi:10.26093/cds/vizier.51480114CDSMayer P.Harmanec P.Sana H.Le Bouquin J.-B.2017-07-06T06:26:09Z2014-12-10T09:36:20ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsspectroscopic-binary-starsearly-type-starsradial-velocityDelta Cir is known as an O7.5 III eclipsing and spectroscopic binary with an eccentric orbit. Penny et al. discovered the presence of a third component in the IUE spectra. The eclipsing binary and the third body revolve around a common center of gravity with a period of 1644days in an eccentric orbit with a semimajor axis of 10AU. We demonstrate the presence of apsidal-line rotation with a period of {approx}141yr, which is considerably longer than its theoretically predicted value, based on the published radii of the binary components derived from the Hipparchos H_p_ light curve. However, our new solution of the same light curve resulted in smaller radii and better agreement between the observed and predicted period of the apsidal-line advance. There are indications that the third body is a binary. The object was resolved by VLTI using the PIONIER combiner; in 2012 June, the separation was 3.78mas with magnitude difference in the H region 1.75fm. This result means that (assuming a distance of 770pc) the inclination of the long orbit is 87.7{deg}.2014AJ....148..114Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/148/114CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/481/183 : Radial velocity curves of V1007 Sco (Mayer+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/148/114https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/148/114http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/148/114https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/148/114https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/148/114http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/148/114GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/148/114/table2FEROS and HARPS radial velocities of {delta} CirrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRJDReduced Julian Date (HJD-2400000)time.epochdoublePhaseOrbital phase (1)time.phasefloatRV1Primary radial velocitykm/sspect.dopplerVelocfloatRV2? Secondary radial velocitykm/sspect.dopplerVelocintnullableRV3? Tertiary radial velocitykm/sspect.dopplerVelocintnullable