J/ApJ/846/93ivo://CDS.VizieR/J/ApJ/846/93doi:10.26093/cds/vizier.18460093CDSShan Y.Yee J.C.Bowler B.P.Cieza L.A.Montet B.T.Canovas H.,Liu M.C.Close L.M.Hinz P.M.Males J.R.Morzinski K.M.Vaz A.,Bailey V.P.Follette K.B. (The MagAO Team)2018-07-19T12:25:07Z2018-05-29T07:07:04ZCDS support team

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

cds-question@unistra.frmultiple-starsinfrared-photometrystellar-spectral-typesproper-motionsstellar-massesstellar-distanceWe image 104 newly identified low-mass (mostly M-dwarf) pre-main sequence (PMS) members of nearby young moving groups (YMGs) with Magellan Adaptive Optics (MagAO) and identify 27 stellar binaries with instantaneous projected separation as small as 40mas. Fifteen were previously unknown. The total number of multiple systems in this sample including spectroscopic and visual binaries from the literature is 36, giving a raw stellar multiplicity rate of at least 35_-4_^+5^% for this population. In the separation range of roughly 1-300au in which infrared AO imaging is most sensitive, the raw multiplicity rate is at least 24_-4_^+5^% for binaries resolved by the MagAO infrared camera (Clio). The M-star subsample of 87 stars yields a raw multiplicity of at least 30_-4_^+5^% over all separations, 21_-4_^+5^% for secondary companions resolved by Clio from 1 to 300au (23_-4_^+5^% for all known binaries in this separation range). A combined analysis with binaries discovered by the Search for Associations Containing Young stars shows that stellar multiplicity fraction as a function of mass over the range of 0.2 to 1.2M_{sun}_ appears to be linearly flat, in contrast to the field, where multiplicity increases with mass. After bias corrections are applied, the multiplicity of low-mass YMG members (0.2-0.6M_{sun}_) is in excess of the field. The overall multiplicity fraction is also consistent with being constant in age and across YMGs, which suggests that multiplicity rates for this mass range are largely set by 10Myr without appreciable evolution thereafter.2017ApJ...846...93Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/846/93CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/322 : UCAC4 Catalogue (Zacharias+, 2012)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/A+A/356/541 : T Tauri stars in the Sco-Cen OB association (Koehler+, 2000)J/AJ/123/1570 : alpha Persei and Praesepe Clusters (Patience+, 2002)J/other/ARA+A/42.685 : Young stars near the Sun (Zuckerman+, 2004)J/ApJS/173/104 : Stellar population in Chamaeleon I (Luhman, 2007)J/ApJ/696/L84 : Primordial circumstellar disks in binaries (Cieza+, 2009)J/A+A/509/A52 : Search for companions with VLT/NACO (Chauvin+, 2010)J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)J/ApJ/754/44 : The AstraLux Large M-dwarf Survey (Janson+ 2012)J/ApJ/745/19 : Binary systems in Taurus-Auriga (Kraus+, 2012)J/ApJ/762/88 : Young stellar kinematic group cand. members (Malo+, 2013)J/MNRAS/435/1325 : Membership of the {epsilon} Cha association (Murphy+, 2013)J/A+A/568/A26 : SACY. V. Multiple systems (Elliott+, 2014)J/ApJ/783/121 : BANYAN II. Nearby young assoc. cand. members (Gagne+, 2014)J/AJ/147/146 : Spectroscopy of Tuc-Hor candidate members (Kraus+, 2014)J/ApJ/785/47 : Sources around target stars in Upper Sco (Lafreniere+, 2014)J/ApJ/788/81 : BANYAN III. RVel & rotation of low-mass stars (Malo+, 2014)J/MNRAS/454/593 : Young moving groups in solar neighbourhood (Bell+, 2015)J/A+A/580/A88 : Stellar multiplicity in 3-1000AU (Elliott+, 2015)J/MNRAS/449/2618 : M-dwarfs in Multiples (MinMs) survey. I. (Ward-Duong+, 2015)J/A+A/590/A13 : New candidate members in young associations (Elliott+, 2016)J/AJ/152/8 : Stellar multiplicity on planetary systems I. (Kraus+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/846/93https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/846/93http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/846/93https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/846/93https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/846/93http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/846/93GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/846/93/target (Young moving group (YMG) low-mass target data (tables 3 and 4))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/846/93/target?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/846/93/target?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/846/93/target?GETtext/xml+votable180.050000true3.237625-79.86869440.0055555555555555566/28746 32930 33094 33129 33167 33170 33237 33411 33422 33449 33456 33464 33468 33493 33501 33520 33523 33545 33565 33583 33594 33654 33666 33677 33694 33716 33737 33756 33894 33919 33956 33965 33993 33996 34012 34058 34118 34127 34145 34152 34196 34312 34380 34417 34418 34450 34819 34823 34830 34857 34932 34959 34963 35002 35112 36948 37013 37092 37097 37557 37573 37638 37745 37792 37840 37970 38002 38120 38440 39019 39192 39575 41184 41247 41538 41758 41854 42176 42272 43372 43565 43571 43670 45345 45366 45377 45471 45475 45492 45770 45852 45876 45977 46082 46236 46739 46754 46758 47120 47249 47345 473668.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/846/93?format=asciiInfrareddefaultJ/ApJ/846/93/table5Astrometric measurements for visual binary (VB) candidates from this workrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintANameAbbreviated target namemeta.id;meta.maincharpmRA[-54.6/97.2]? Proper motion in RA; *cos(DEC) (1)log(mas.yr**-1)pos.pm;pos.eq.rafloatnullablee_pmRA[0.9/6.3]? Error in pmRAlog(mas.yr**-1)stat.error;pos.pm;pos.eq.rafloatnullablepmDE[-104.1/45.8]? Proper motion in Declinationlog(mas.yr**-1)pos.pm;pos.eq.decfloatnullablee_pmDE[0.8/5.1]? Error in pmDElog(mas.yr**-1)stat.error;pos.pm;pos.eq.decfloatnullableEpochEpoch of observation (UT date)time.epochnullableBandBand (H or Ks (1 occurrence))meta.code;instr.filtercharSep[0.05/3.2]? Angular separationarcsecpos.angDistancefloatnullablee_Sep[0/0.05]? Error in Separcsecstat.errorfloatnullablef_Sep[ce] Flag on Sep (2)meta.codecharPA[8/333]? Position angle; east of northdegpos.posAngfloatnullablee_PA[0.3/4.5]? Error in PAdegstat.errorfloatnullabledMag[0.03/5.2]? Delta-magnitudemagphot.magfloatnullablee_dMag[0.01/0.3]? Error in dMagmagstat.error;phot.magfloatnullableCoMvComoving flag (G1)meta.codecharJ/ApJ/846/93/table8System properties of visual doubles observed by ClioNotesNotes (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintYMGAbbreviated YMG namemeta.id.parentcharANameAbbreviated target namemeta.id;meta.maincharSpTMK spectral typesrc.spTypecharDist[16/120] Distancepcpos.distance;pos.heliocentricinte_Dist[1/19] Error in distancepcstat.errorintEpochBest epoch of observationtime.epoch;obscharBandBand (H or Ks (1 occurrence))meta.code;instr.filtercharSep[0.05/3.2] Angular separationarcsecpos.angDistancefloate_Sep[0/0.03] Error on Separcsecstat.errorfloatPA[8/326] Position angledegpos.posAngfloate_PA[0.3/4.5] Error on PAdegstat.errorfloatdMag[0.03/5.1] Delta-magnitudemagphot.magfloate_dMag[0.01/0.3] Error on dMagmagstat.error;phot.magfloatCoMvComoving flag (G1)meta.codecharPunbd[0/0.08] Unbound probability%statfloatPSep[1.1/281.4] Projected physical separationAUpos.angDistancefloate_PSep[0.1/16.1] Error on PSepAUstat.errorfloatMp[0.1/0.9]? Primary masslog(solMass)phys.massfloatnullableMs[0.04/0.7]? Secondary masslog(solMass)phys.massfloatnullableq[0.1/1]? Mass ratio; Mprim/Msecphys.massfloatnullableKnownKnown binary? (14 "yes")meta.codecharJ/ApJ/846/93/targetYoung moving group (YMG) low-mass target data (tables 3 and 4)Nep[1/4] Number of epochs observedmeta.numberintYMGAbbreviated YMG name (1)meta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS target identifiermeta.id;meta.maincharf_2MASS[a] Flag on 2MASS (2)meta.codecharANameAbbreviated name of targetmeta.idcharprimaryBinDisplay the visual binary data (tables 5 and 8)meta.ref.urlcharRAJ2000[0/23] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[32/79] Degree of Declination (J2000)pos.eq.dec;meta.mainSpTMK spectral typesrc.spTypecharDist[16/120] Distance estimate (3)pcpos.distance;pos.heliocentricinte_Dist[0/19] Uncertainty in Distpcstat.errorintf_Dist[cdef] Flag on Dist (4)meta.codecharr_Dist[1/5] Reference on Dist (5)meta.ref;pos.frameintJmag[7.5/11.7] 2MASS apparent J band magnitudemagphot.mag;em.IR.JfloatHmag[6.9/11.2] 2MASS apparent H band magnitudemagphot.mag;em.IR.HfloatKsmag[6.7/11] 2MASS apparent Ks band magnitudemagphot.mag;em.IR.KfloatMp[0.1/0.9]? Primary Mass (6)solMassphys.massfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharEpochBest epoch (UT date)time.epoch;meta.modellednullableBandBand (H or Ks)meta.code;instr.filtercharbmin[0.02/0.3] Semi-Minor axis of PSF at half-maxarcsecphys.angSizefloate_bmin[0/0.05] Uncertainty in bminarcsecstat.errorfloatb/a[0.6/1] Axis ratio of PSF at half-max; Minor/Majorphys.angSize;arith.ratiofloate_b/a[0/0.2] Uncertainty in b/astat.errorfloatPA[4/178] Orientation angle of PSF; East of Northdegpos.posAnginte_PA[1/47] Uncertainty in PAdegstat.errorintMultMultiplicity status (1)meta.code.multipchar