J/AJ/149/195ivo://CDS.VizieR/J/AJ/149/195doi:10.26093/cds/vizier.51490195CDSTokovinin A.Latham D.W.Mason B.D.2017-06-21T08:22:40Z2015-06-12T15:00:49ZCDS support team

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

cds-question@unistra.frmultiple-starsx-ray-sourcesradial-velocityThe young nearby solar-type star HD 91962 is a rare quadruple system where three companions revolve around the main component with periods of 170.3days, 8.85years, and 205years. The two outer orbits are nearly co-planar, and all orbits have small eccentricities. We refine the visual orbit of the outer pair and determine the combined spectro-interferometric orbit of the middle 8.8year pair and the spectroscopic orbit of the inner binary. The middle and inner orbits are likely locked in a 1:19 resonance, and the ratio of the outer and middle periods is ~23. The masses of all components are estimated (inside-out: 1.14, 0.32, 0.64, 0.64 solar mass). The dynamical parallax is 27.4+/-0.6mas. We speculate that this multiple system originated from collapse of an isolated core and that the companions migrated in a dissipative disk. Other multiple systems with similar features (co-planarity, small eccentricity, and period ratio around 20) are known.2015AJ....149..195Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/149/195CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/239 : The Hipparcos and Tycho Catalogues (ESA 1997)J/AJ/147/123 : 2012/2013 speckle interferometry with SOAR (Tokovinin+, 2014)J/AJ/147/87 : From binaries to multiples. II. (Tokovinin, 2014)J/AJ/139/743 : Speckle interferometry in 2008-09 (Tokovinin+, 2010)J/ApJS/181/62 : Survey of young solar analogs (Metchev+, 2009)J/A+A/493/1099 : CaII HK emission in rapidly rotating stars (Schroeder+, 2009)J/AJ/133/2524 : Spectra of young nearby stars (White+, 2007)J/A+A/356/141 : BV photometry for components of HIP doubles (Fabricius+ 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/149/195https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/149/195http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/149/195https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/149/195https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/149/195http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/149/195GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapX-rayOpticaldefaultJ/AJ/149/195/speckleSpeckle measurements and residuals for the systems Aa,Ab , and A,BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCompComponent (Aa,Ab or A,Bmeta.code.multipcharYear[1903/2016] Besselian yearyrtimedoublePA[0/360] Position angle {theta}degpos.posAngfloatSep[0/2] Separation {rho}arcsecpos.angDistance;src.orbitalfloate_SepAssumed error used for weightingarcsecstat.errorfloat(O-C)PAThe (O-C) residual in position angledegstat.fit.residualfloat(O-C)SepThe (O-C) residual in separationarcsecstat.fit.residualfloatJ/AJ/149/195/table4Radial velocities and residuals of Aa1,Aa2 (P=170.304+/-0.013d)O-CThe (O-C) residualkm/sstat.fit.residual;stat.fit.omcfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD[48290/56828] Julian Date (JD-2400000)dtime.epochdoubleRV[8.3/35] Radial velocitykm/sphys.veloc;pos.heliocentricfloate_RV[0.1/0.6] Uncertainty in RVkm/sstat.errorfloat