J/A+A/574/A6ivo://CDS.VizieR/J/A+A/574/A6doi:10.26093/cds/vizier.35740006CDSAgati J.-L.Bonneau D.Jorissen A.Soulie E.Udry S.Verhas P.,Dommanget J.2017-11-28T13:21:54Z2015-03-24T14:05:06ZCDS support team

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

cds-question@unistra.frmultiple-starsWe test whether or not the orbital poles of the systems in the solar neighbourhood are isotropically distributed on the celestial sphere. The problem is plagued by the ambiguity on the position of the ascending node. Of the 95 systems closer than 18pc from the Sun with an orbit in the 6th Catalogue of Orbits of Visual Binaries, the pole ambiguity could be resolved for 51 systems using radial velocity collected in the literature and CORAVEL database or acquired with the HERMES/Mercator spectrograph. For several systems, we can correct the erroneous nodes in the 6th Catalogue of Orbits and obtain new combined spectroscopic/astrometric orbits for seven systems [WDS 01083+5455Aa,Ab; 01418+4237AB; 02278+0426AB (SB2); 09006+4147AB (SB2); 16413+3136AB; 17121+4540AB; 18070+3034AB]. We used of spherical statistics to test for possible anisotropy. After ordering the binary systems by increasing distance from the Sun, we computed the false-alarm probability for subsamples of increasing sizes, from N=1 up to the full sample of 51 systems. Rayleigh-Watson and Beran tests deliver a false-alarm probability of 0.5% for the 20 systems closer than 8.1pc. To evaluate the robustness of this conclusion, we used a jackknife approach, for which we repeated this procedure after removing one system at a time from the full sample. The false-alarm probability was then found to vary between 1.5% and 0.1%, depending on which system is removed. The reality of the deviation from isotropy can thus not be assessed with certainty at this stage, because only so few systems are available, despite our efforts to increase the sample. However, when considering the full sample of 51 systems, the concentration of poles toward the Galactic position l=46.0{deg}, b=37{deg}, as observed in the 8.1pc sphere, totally vanishes (the Rayleigh-Watson false-alarm probability then rises to 18%).2015A&A...574A...6Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/574/A6CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)B/sb9 : SB9: 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/574/A6https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/574/A6http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/574/A6https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/574/A6https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/574/A6http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/574/A6GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/574/A6/systems (Cross-identifications and data for the master list of 95 systems closer than 20pc from the Sun and the are known to have an orbit in the 6th COVBS at USNO)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/574/A6/systems?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/574/A6/systems?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/574/A6/systems?GETtext/xml+votable180.050000true0.542318627.08225830.005555555555555556Cone search capability for table J/A+A/574/A6/table3 (Position of the 51 orbital poles in Galactic coordinates for systems closer than 18pc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/574/A6/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/574/A6/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/574/A6/table3?GETtext/xml+votable180.050000true0.54227.0820.0055555555555555566/137 684 1477 1504 2317 2476 2737 2747 2923 3020 3088 3118 3345 3751 5377 5514 5670 5802 6340 6726 7205 7264 8790 8843 8845 8996 9072 9327 9696 9835 10027 10225 10313 11034 11290 11636 12795 13301 13308 13440 13512 14266 14515 14522 15311 15861 16105 16678 17875 18450 19815 20071 20278 20543 20940 21136 21568 22148 22300 22709 23137 23960 24151 24212 26174 26462 26614 27973 27980 29196 30327 30475 30833 31073 31751 31929 32619 32645 34896 35948 36526 37902 39154 39499 40430 41763 42285 42459 44284 47352 48263 48985https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/574/A6?format=asciiOpticaldefaultJ/A+A/574/A6/systemsCross-identifications and data for the master list of 95 systems closer than 20pc from the Sun and the are known to have an orbit in the 6th COVBS at USNOOSimbad column added by the CDSmeta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWDSWDS name (Cat. B/wds)meta.id;meta.maincharprimaryCompWDS componentsmeta.code.multipcharCCDMCCDM name (Cat. I/274)meta.idcharHIP? HIP/HIC name (Cat. I/239)meta.idintnullableHD? HD name (Cat. III/135)meta.idintnullablem_HDMultiplicity index on HDmeta.code.multipcharSB9? SB9 number (Pourbaix et al., 2004, B/sb9)meta.idintnullableNameDiscoverer namemeta.idcharplxParallax (1)maspos.parallax.trigfloatSpTypeMK spectral typesrc.spTypecharPer[0.02/3200] Orbital periodyrtime.perioddoublea[0.001/42] Orbital semi-major axisarcsecphys.angSize.smajAxisfloatMtot? Total mass of the systemsolMassphys.massfloatnullableq[0.3/1.7]? Mass ratio M_B_/M_A_phys.massfloatnullableGr[1/9] Grade of the orbit, 1=bestmeta.code.qualintRef1Visual orbit reference, in refs.dat filemeta.ref;pos.framecharRef2Spectroscopic orbit reference, in refs.dat filemeta.ref;pos.framecharAFlag indicating whether the system has (or not) been considered in the final analysis (2)meta.codecharNote[nt] t: triple or higher-multiplicity systems noted and/or n: note in appena.dat filemeta.notecharwdsDisplay the WDS (B/wds) systemsmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/574/A6/table3Position of the 51 orbital poles in Galactic coordinates for systems closer than 18pcWDSWDS namemeta.id;meta.maincharx[-1/1] X polar coordinate [cos(Glon).cos(Glat)]pos.dirCosdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCompWDS componentsmeta.code.multipchari[0/180] Inclination angledegsrc.orbital.inclination;pos.posAngfloatOmega[0/360] Longitude of ascending node {Omega}degsrc.orbital.nodefloatomega[0/360] Longitude of the periastron of the visual orbit {omega} (1)degsrc.orbital.periastronfloatRAJ2000Right ascension of the orbital pole (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of the orbital pole (J2000)degpos.eq.dec;meta.mainplxParallaxmaspos.parallax.trigfloatGlonGalactic longitude of the orbital poledegpos.galactic.lonGlatGalactic latitude of the orbital poledegpos.galactic.latfloaty[-1/1] Y polar coordinate [sin(Glon).cos(Glat)]pos.dirCosdoublez[-1/1] Z polar coordinate [sin(Glat)]pos.dirCosdoubleDist[0/18] Distancepcpos.distance;pos.heliocentricfloatN[1/51] Rank of system in order of increasing distancemeta.idintNote[nt] t: triple or higher-multiplicity systems noted and/or n: note in appena.dat filemeta.notecharJ/A+A/574/A6/appenaIndividual notesWDSWDS namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCompWDS componentsmeta.code.multipcharNoteText of the notemeta.notecharJ/A+A/574/A6/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.notecharBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar