J/ApJ/844/103ivo://CDS.VizieR/J/ApJ/844/103doi:10.26093/cds/vizier.18440103CDSTokovinin A.2018-05-16T07:04:47Z2018-04-06T14:21:48ZCDS support team

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

cds-question@unistra.frmultiple-starsorbitsvisible-astronomytrigonometric-parallaxThe statistics of the angle {Phi} between orbital angular momenta in hierarchical triple systems with known inner visual or astrometric orbits are studied. A correlation between apparent revolution directions proves the partial orbit alignment known from earlier works. The alignment is strong in triples with outer projected separation less than ~50au, where the average {Phi} is about 20{deg}. In contrast, outer orbits wider than 1000 au are not aligned with the inner orbits. It is established that the orbit alignment decreases with the increasing mass of the primary component. The average eccentricity of inner orbits in well-aligned triples is smaller than in randomly aligned ones. These findings highlight the role of dissipative interactions with gas in defining the orbital architecture of low-mass triple systems. On the other hand, chaotic dynamics apparently played a role in shaping more massive hierarchies. The analysis of projected configurations and triples with known inner and outer orbits indicates that the distribution of {Phi} is likely bimodal, where 80% of triples have {Phi}<70{deg} and the remaining ones are randomly aligned.2017ApJ...844..103Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/844/103CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)J/AJ/111/370 : Orbits of 37 close visual systems (Hartkopf+ 1996)J/A+AS/124/75 : Multiple star catalogue (MSC) (Tokovinin 1997-1999)J/A+A/341/121 : Visual binary orbits and masses (Soederhjelm 1999)J/AJ/119/3084 : ICCD speckle obs. of binary stars. XXIII. (Hartkopf+, 2000)J/AJ/123/1023 : Binary star orbits (Seymour+, 2002)J/A+A/384/1030 : Orientation of orbits in triple stars (Sterzik+, 2002)J/AJ/132/2219 : Speckle interferometry at USNO. XII (Mason+, 2006)J/AN/330/55 : PISCO speckle observations in 2006 (Scardia+, 2009)J/AJ/140/1657 : PHASES diff. astrometry data archive V. (Muterspaugh+, 2010)J/AJ/147/86 : From binaries to mult. I. FG-67 sample (Tokovinin, 2014)J/AJ/149/195 : Spectro. of the quadruple system HD 91962 (Tokovinin+, 2015)J/AJ/150/50 : Speckle interferometry at SOAR in 2014 (Tokovinin+, 2015)J/ApJ/799/4 : Robo-AO observations of binary stars (Riddle+, 2015)J/MNRAS/455/4136 : Kepler triples (Borkovits+, 2016)J/A+A/594/A55 : xi Tau UBV and MOST light curves (Nemravova+, 2016)J/AJ/152/213 : Interferometry & spectro. of sigma Orionis (Schaefer+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/844/103https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/844/103http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/844/103https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/844/103https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/844/103http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/844/103GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/844/103/table1 (Hierarchical systems with resolved inner orbit)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/844/103/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/844/103/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/844/103/table1?GETtext/xml+votable180.050000true0.605541710.77663890.0055555555555555566/90 137 342 473 500 603 708 781 783 795 815 845 861 1016 1040 1050 1159 1182 1286 1453 1504 1550 1603 1673 1687 1739 1749 1852 1939 1953 2042 2125 2133 2139 2348 2365 2374 2452 2460 2536 2564 2593 2606 2704 2731 2747 2778 2789 2881 3011 3030 3063 3280 3285 3384 3507 3551 3592 3594 3678 3710 3751 3756 3888 3983 4095 4143 4243 4316 4344 4471 4640 4670 4798 4822 5039 5377 5428 5455 5501 6126 6147 6154 6251 6340 6384 6408 6611 6628 6934 7117 7205 7580 7645 8324 8354 8440 8610 8704 8788 8794 8958 8995 9072 9294 9419 9442 9503 9529 9570 9767 9857 9873 10000 10004 10090 10225 10467 10585 10912 11011 11029 11109 11436 11721 11748 11951 12295 12301 12303 12330 12362 12378 12464 12472 12649 12784 12795 12905 12965 13052 13292 13323 13336 13559 13721 13776 13960 13961 13973 14084 14093 14396 14459 14522 14525 14647 14653 14747 14772 14814 14843 14862 14908 14918 15025 15166 15246 15330 15482 15577 15578 15631 15680 15760 15852 15865 15948 16144 16302 16338 16502 16569 16930 17017 17136 17137 17486 17946 17955 17964 17999 18003 18017 18135 18688 18749 18826 19029 19105 19126 19237 19417 19525 19556 19649 19794 19816 19827 19923 20022 20078 20143 20252 20298 20311 20322 20391 20402 20429 20543 21519 21538 21637 22263 22419 22708 22773 22837 22854 22882 22884 22979 22988 23182 23201 23260 23351 23377 23403 23423 23457 23548 23575 23637 23826 23978 24023 24159 24303 24315 24398 24496 24952 25034 25113 25206 25571 25713 25789 25875 25971 26141 26241 26254 26555 26563 26731 26924 27014 27096 27439 27491 27770 27813 27822 28011 28014 28252 28484 28582 28779 28961 29196 29347 29439 29805 29898 30269 30448 30697 30833 30859 30910 30914 30983 31133 31491 31501 31621 31666 31672 31760 31821 31848 32027 32058 32144 32307 32372 32516 32542 32597 32645 32652 32720 33116 33340 33716 33905 34152 34464 34517 34785 34823 34914 34968 35690 35808 36069 36072 36173 36177 36285 36390 36396 36748 36841 36971 37012 37111 37231 37779 37897 38198 38359 38635 38862 38936 38985 39025 39138 39165 39189 39217 39267 39279 39440 39654 39676 39709 40199 40208 40519 40755 40783 40819 40827 41465 41607 41689 41763 42053 42091 42216 42364 42459 42734 42889 42977 42992 43008 43023 43072 43329 43372 44011 44123 44127 44281 44284 44329 44389 44451 44844 44891 45062 45272 45299 45538 45564 45773 45823 46291 46977 47140 47249 48212 48489 48856https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/844/103?format=asciiOpticaldefaultJ/ApJ/844/103/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.note;meta.maincharprimaryAuthAuthor(s)' name(s)meta.id;meta.maincharBibCodeBibcode of the reference if anymeta.bib.bibcodecharCommCommentmeta.notecharJ/ApJ/844/103/table1Hierarchical systems with resolved inner orbitrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWDSWDS code (HHMMm+DDMM; J2000)meta.id;meta.maincharprimaryvoDisplay the two known visual orbits (table 3)meta.ref.urlcharPlx[0.8/742.1] Hipparcos parallaxmaspos.parallaxfloatM1[0.05/50] Primary mass in the inner subsystemsolMassphys.massfloatP1[0.1/3962.5] Inner periodyrtime.periodfloate1Inner eccentricitysrc.orbital.eccentricityfloata1[0.001/32.4] Inner semimajor axisarcsecphys.angSize.smajAxis;src.orbitalfloatW1[0/357] Inner node {Omega}_1_degsrc.orbital.nodefloati1[0/283] Inner inclinationdegsrc.orbital.inclinationfloatSep[0.05/7860] Outer separation {rho}arcsecpos.angDistance;src.orbitalfloatPAOuter position angle {theta}degpos.posAngfloatRevDir[-1/1] Outer revolution direction (-1 for retrograde; 0 for unknown)meta.codeintSign[-1/1] Apparent revolution (1=corotating; -1=counter-rotating)meta.codeintSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions of component A in the WDS catalog (B/wds) (right ascension part)degpos.eq.ra;meta.main_DEPositions of component A in the WDS catalog (B/wds) (declination part)degpos.eq.dec;meta.mainJ/ApJ/844/103/table3Hierarchical systems with two known visual orbitsP[0.01/1431] Periodyrtime.periodfloatI/OInner or outer subsystemmeta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWDSWDS code (HHMMm+DDMM; J2000)meta.id;meta.mainchareEccentricitysrc.orbital.eccentricityfloata[0/7.7] Semimajor axisarcsecphys.angSize.smajAxis;src.orbitalfloatW[0/345] Position angle of node {Omega}degsrc.orbital.nodefloati[11.8/180] Inclinationdegsrc.orbital.inclinationfloatQual[0/9] Orbit grade from 1 (best) to 5 (tentative), 8 and 9 (astrometric)meta.codeintRefReference code (see refs.dat)meta.notecharPhi[0.3/174.1] Angle Phi between angular momentadegpos.posAngfloat