J/AJ/160/268ivo://CDS.VizieR/J/AJ/160/268doi:10.26093/cds/vizier.51600268CDSTokovinin A.Petr-Gotzens M.G.Briceno C.2022-05-10T08:26:50Z2021-02-26T08:48:53ZCDS support team

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

cds-question@unistra.frmultiple-starspre-main-sequence-starsinfrared-photometryproper-motionsvisible-astronomytrigonometric-parallaxstellar-spectral-typesastrometryStatistics of low-mass pre-main-sequence binaries in the Orion OB1 association with separations ranging from 0.6" to 20" (220 to 7400au at 370pc) are studied using images from the VISTA Orion mini survey and astrometry from Gaia. The input sample based on the CVSO catalog contains 1137 stars of K and M spectral types (masses between 0.3 and 0.9M{odot}), 1021 of which are considered to be association members. There are 135 physical binary companions to these stars with mass ratios above ~0.13. The average companion fraction is 0.09{+/-}0.01 over 1.2 decades in separation, slightly less than, but still consistent with, the field. We found a difference between the Ori OB1a and OB1b groups, the latter being richer in binaries by a factor of 1.6{+/-}0.3. No overall dependence of the wide- binary frequency on the observed underlying stellar density is found, although in the Ori OB1a off-cloud population, these binaries seem to avoid dense clusters. The multiplicity rates in Ori OB1 and in sparse regions like Taurus differ significantly, hinting that binaries in the field may originate from a mixture of diverse populations.2020AJ....160..268Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/160/268CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/36 : UBV & uvby-beta observations of Orion OB1 Association (Warren+, 1977)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/AJ/129/907 : New Ori OB1 members (Briceno+, 2005)J/ApJ/661/1119 : Spectroscopy in the 25 Ori group (Briceno+, 2007)J/AJ/134/2272 : Visual binaries in the Orion Nebula Cluster (Reipurth+, 2007)J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)J/ApJ/731/8 : Multiple star formation in Taurus-Auriga (Kraus+, 2011)J/AJ/147/87 : From binaries to multiplesII Statistical data (Tokovinin,2014)J/A+A/581/A140 : VISTA Orion mini-survey (Spezzi+, 2015)J/A+A/599/A14 : Taurus ultra-wide pairs (Joncour+, 2017)J/AJ/156/84 : APOGEE-2 survey of Orion Complex. II. (Kounkel+, 2018)J/ApJS/235/6 : Updated Multiple Star Catalog; August 2019 (Tokovinin, 2018)J/AJ/157/85 : The CIDA Variability Survey of Orion OB1. II. (Briceno+, 2019)J/A+A/627/A57 : ONC binary and triple stars (Jerabkova+, 2019)J/A+A/631/A166 : Members of 5 cluster in Ori OB1a association (Kos+, 2019)J/AJ/158/48 : Speckle interferometry at SOAR in 2018 (Tokovinin+, 2019)J/AJ/157/216 : Stellar multiplicity rate M dwarfs within 25pc (Winters+,2019)J/AJ/159/15 : Binary stars in Upper Scorpius (Tokovinin+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/160/268https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/160/268http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/160/268https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/160/268https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/160/268http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/160/268GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/160/268/table1 (CVSO-VISTA-Gaia sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/160/268/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/160/268/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/160/268/table1?GETtext/xml+votable180.050000true79.5724-0.322160.0055555555555555564/1430 5/5715 5724 5726 6/22854-22855 22857 22859 22874 22977 22980-22981 22992 229941.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/160/268?format=asciiOpticalInfrareddefaultJ/AJ/160/268/table1CVSO-VISTA-Gaia samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNint[1/1407] Internal number (G1)meta.idintprimaryCVSO[7/2001] CVSO number (G2)meta.id;meta.mainintRAJ2000[79.5/85.6] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-2.09/3.59] Declination (J2000)degpos.eq.dec;meta.mainplx[-1.75/10.72]? Parallax (1)maspos.parallax.trigfloatnullablee_plx[0/1.32]? Parallax error (1)masstat.error;pos.parallaxfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharSpTSpectral typesrc.spTypecharpmRA[-61.2/55.85]? Proper motion in R.A. (1)mas/yrpos.pm;pos.eq.rafloatnullablepmDE[-127.07/56.87]? Proper motion in Dec. (1)mas/yrpos.pm;pos.eq.decfloatnullableGmag[0/20.72] Gaia DR2 G-band magnitudemagphot.mag;em.optfloatJmag[10.47/17.01] J-band magnitudemagphot.mag;em.IR.Jfloatrerr[0/18.96] Relative parallax errorstat.errorfloatMemb[0/2] Membership flag (2)meta.code.memberintSep[0/19.96] Binary separationarcsecpos.angDistance;src.orbitalfloatVISTAcompNumber of companion in the VISTA images (table3)meta.numberintnullableJ/AJ/160/268/table3Companions detected in the VISTA imagesNint[1/1406] Internal number (G1)meta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCVSO[11/1914] CVSO number (G2)meta.id;meta.mainintPA[0.7/359] Position angledegpos.posAngfloatSep[0.505/11.44]Separationarcsecpos.angDistance;src.orbitalfloatrmsSep[0.001/2.23]RMS scatter of separationarcsecstat.errorfloatdZmag[-1.35/7.5]? Magnitude difference in Z (1)magphot.mag;em.opt.IfloatnullabledYmag[-1.27/7.5]? Magnitude difference in Y (1)magphot.mag;em.IR.JfloatnullabledJmag[-1.24/7.19]? Magnitude difference in J (1)magphot.mag;em.IR.JfloatnullabledHmag[-1.28/7.04]? Magnitude difference in H (1)magphot.mag;em.IR.HfloatnullabledKmag[-4.44/7.06]? Magnitude difference in K (1)magphot.mag;em.IR.KfloatnullablermsdZ[0/1.14]? RMS scatter of dZ (2)magstat.errorfloatnullablermsdY[0/2.78]? RMS scatter of dY (2)magstat.errorfloatnullablermsdJ[0/1.76]? RMS scatter of dJ (2)magstat.errorfloatnullablermsdH[0/5.78]? RMS scatter of dH (2)magstat.errorfloatnullablermsdK[0/4.94]? RMS scatter of dK (2)magstat.errorfloatnullableDcompNumber of companion with Jmag<3mag (table5)meta.numberintnullableJ/AJ/160/268/table5Companions with {Delta}J<3magNint[5/1406] Internal number (G1)meta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCVSO[11/1895] CVSO number (G2)meta.id;meta.mainintPA[0.3/358.2] Position angledegpos.posAngfloatSep[0.5/20] Separationarcsecpos.angDistance;src.orbitalfloatdJmag[-3.78/2.99] J-band magnitude difference (1)magphot.mag;em.IR.JfloatdGmag[-6/4.74] G-band magnitude differencemagphot.mag;arith.difffloatpastro[0/1] Astrometric membership flag (2)meta.code.memberfloatpphys[-1/1] Physical relation flag (3)meta.codefloat