J/ApJ/840/87ivo://CDS.VizieR/J/ApJ/840/87doi:10.26093/cds/vizier.18400087CDSRiedel A.R.Alam M.K.Rice E.L.Cruz K.L.Henry T.J.2018-05-16T06:47:00Z2018-01-22T13:20:53ZCDS support team

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

cds-question@unistra.frradial-velocitystellar-spectral-typesline-intensitiesWe present a spectroscopic and kinematic analysis of 79 nearby M dwarfs in 77 systems. All of these dwarfs are low-proper-motion southern hemisphere objects and were identified in a nearby star survey with a demonstrated sensitivity to young stars. Using low-resolution optical spectroscopy from the Red Side Spectrograph on the South African Large Telescope, we have determined radial velocities, H-alpha, lithium 6708{AA}, and potassium 7699{AA} equivalent widths linked to age and activity, and spectral types for all of our targets. Combined with astrometric information from literature sources, we identify 44 young stars. Eighteen are previously known members of moving groups within 100pc of the Sun. Twelve are new members, including one member of the TW Hydra moving group, one member of the 32 Orionis moving group, 9 members of Tucana- Horologium, one member of Argus, and two new members of AB Doradus. We also find 14 young star systems that are not members of any known groups. The remaining 33 star systems do not appear to be young. This appears to be evidence of a new population of nearby young stars not related to the known nearby young moving groups.2017ApJ...840...87Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/840/87CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/227 : General Catalog of galactic Carbon stars, 3d Ed. (Alksnis+ 2001)I/297 : NOMAD Catalog (Zacharias+ 2005)I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)I/317 : The PPMXL Catalog (Roeser+ 2010)I/322 : UCAC4 Catalogue (Zacharias+, 2012)J/ApJS/141/503 : Radial Velocities for 889 late-type stars (Nidever+, 2002)J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)J/A+A/460/695 : Associations Containing Young stars (Torres+, 2006)J/AN/328/889 : Mean Radial Velocities of open clusters (Kharchenko+, 2007)J/AJ/134/2340 : Membership of Praesepe & Coma Berenices (Kraus+, 2007)J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008)J/ApJS/184/138 : XID II: RASS-2MASS cross-association (Haakonsen+, 2009)J/ApJ/699/649 : Young M dwarfs within 25pc. I. (Shkolnik+, 2009)J/AJ/140/119 : {beta}Pic & AB Dor moving groups members (Schlieder+, 2010)J/ApJ/758/56 : Young M dwarfs within 25pc. II. Kinematics (Shkolnik+, 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/ApJ/783/121 : BANYAN II. Nearby young assoc. cand. members (Gagne+, 2014)J/ApJ/788/81 : BANYAN III. RV & rotation of low-mass stars (Malo+, 2014)J/AJ/147/85 : Solar neighborhood. XXXIII. 45 M dwarfs (Riedel+, 2014)J/MNRAS/454/593 : Young moving groups in solar neighbourhood (Bell+, 2015)J/ApJ/798/73 : BANYAN All-Sky Survey (BASS) catalog. V. YMGs (Gagne+, 2015)J/MNRAS/447/1267 : Low-mass members of the Octans association (Murphy+, 2015)J/ApJS/225/10 : Kinematic analysis of M7-L8 dwarfs (Faherty+, 2016)http://www.recons.org/ : Research Consortium on Nearby Starshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/840/87https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/840/87http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/840/87https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/840/87https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/840/87http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/840/87GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/840/87/targets (Previously published data, radial velocities and spectral types from this paper, and youth properties (tables 1, 2 and 5))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/840/87/targets?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/840/87/targets?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/840/87/targets?GETtext/xml+votable180.050000true4.34811-66.753420.0055555555555555566/16455 16917 17435 17606 18503 18617 21031 22802 24629 24645 24740 24763 24819 24843 24995 25347 25745 25756 25860 33449 33462 33493 33501 33520 33531 33545 33593 33666 33716 33737 34902 34998 35121 35809 35887 36028 36060 36778 38235 38341 38347 38359 38797 39723 40402 40887 41247 43372 43379 43677 43747 44159 44214 44971 45297 45389 45497 45626 45668 45770 46187 46449 46456 47047 47113 47207 47210 47249 47538 47591 47599 47639 47911 48089 48648 48926 490568.650015785639275e-20 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/840/87?format=asciiOpticaldefaultJ/ApJ/840/87/table4UVWXYZ space velocities and positionsVV Galactic space motion(1)km/sphys.veloc;pos.cartesian.yfloatXX Galactic coordinate(1)pcpos.cartesian.x;pos.galacticfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameShortened Object Name; see Table 1 for UCAC4 identifiersmeta.id;meta.maincharUU Galactic space motion(1)km/sphys.veloc;pos.cartesian.xfloate_UUncertainty in U (1)km/sstat.error;pos.cartesian.xfloate_VUncertainty in V (1)km/sstat.error;pos.cartesian.yfloatWW Galactic space motion(1)km/sphys.veloc;pos.cartesian.zfloate_WUncertainty in W (1)km/sstat.error;pos.cartesian.zfloate_XUncertainty in X (1)pcstat.error;pos.cartesian.xfloatYY Galactic coordinate(1)pcpos.cartesian.y;pos.galacticfloate_YUncertainty in Y (1)pcstat.error;pos.cartesian.yfloatZZ Galactic coordinate(1)pcpos.cartesian.z;pos.galacticfloate_ZUncertainty in Z (1)pcstat.error;src.redshiftfloatJ/ApJ/840/87/targetsPreviously published data, radial velocities and spectral types from this paper, and youth properties (tables 1, 2 and 5)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameShortened Object Namemeta.id;meta.maincharprimaryUCAC4UCAC4 Designationmeta.idcharVDisplay the UVWXYZ space velocities (table 4) if anymeta.ref.urlcharRAJ2000[4.3/355.1] Right Ascension (J2000)degpos.eq.ra;meta.maine_RAJ2000[5/128] Uncertainty on RAdegmasstat.error;pos.eq.raintDEJ2000[-71/-6] Declination (J2000)degpos.eq.dec;meta.maine_DEJ2000[3/115] Uncertainty on DEdegmasstat.error;pos.eq.decintpmRA[-278/263] Proper motion, Right Ascension (1)mas/yrpos.pm;pos.eq.rafloate_pmRAUncertainty on pmRA (1)mas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-234/126] Proper motion, Declinationmas/yrpos.pm;pos.eq.decfloate_pmDEUncertainty on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatr_pmRASource of position and proper motion (2)meta.ref;pos.pm;pos.eq.racharVmag[11.4/14.7] Johnson V magnitudemagphot.mag;em.opt.Vfloate_Vmag[0.01/0.3]? Uncertainty on Vmagmagstat.error;phot.mag;em.opt.Vfloatnullabler_VmagSource of Vmag (2)meta.ref;pos.framecharKsmag[6.7/9.2] 2MASS Ks magnitudemagphot.mag;em.IR.Kfloate_Ksmag[0.02/0.04] Uncertainty on Ksmagmagstat.error;phot.mag;em.IR.Kfloatr_KsmagSource of Ksmag (2)meta.ref;pos.framecharplx[14.9/53.2]? Parallaxmaspos.parallax.trigfloatnullablee_plx[0.2/2.7]? Uncertainty on plxmasstat.error;pos.parallaxfloatnullabler_plxSource of plx (3)meta.ref;pos.framecharHRV[-205/37] Heliocentric Radial Velocity from this paperkm/sspect.dopplerVeloc;pos.heliocentricfloate_HRV[0.8/13] Uncertainty on HRVkm/sstat.errorfloatHRVl[-10/25]? Heliocentric Radial Velocity from other paperskm/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRVl[0.02/20]? Uncertainty on HRVlitkm/sstat.errorfloatnullabler_HRVlSource of HRVlit (4)meta.ref;pos.framecharSpTSpectral Type on MK system from this papersrc.spTypecharf_SpTFlag on 2MASS 0510-2340B' spectral type (5)meta.codecharEWLi[0.18/0.4]? Equivalent width of unresolved Li 6708{AA} doublet0.1nmspect.line.eqWidthfloatnullablee_EWLi[0.001/0.04]? Uncertainty on EWLi0.1nmstat.errorfloatnullableEWKI[-0.07/1.8] Equivalent width of K 7699{AA} line0.1nmspect.line.eqWidthfloate_EWKI[0/0.4] Uncertainty on EWKI0.1nmstat.errorfloatEWHa[-18/0.07] Equivalent width of H-alpha 6563{AA} line0.1nmspect.line.eqWidth;em.line.Halphafloate_EWHa[0/1.3] Uncertainty on EWHa0.1nmstat.errorfloatGrouplMoving group identification in literaturemeta.id;pos.lgcharr_GrouplSource of groupLit (7)meta.ref;pos.framecharGroupLACEwING moving group identificationmeta.id;pos.lgcharf_Group[*] *: star was originally identified as a member of a different groupmeta.codecharq_Group[0/100]? Probability of group%meta.code.qual;pos.lgintnullablekDist[21/88]? LACEwING kinematic distance estimatepcpos.distance;pos.heliocentricfloatnullablee_kDist[0.1/11]? Uncertainty on kinDistpcstat.errorfloatnullablekHRV[-19/24]? LACEwING kinematic radial velocity estimatekm/sphys.veloc;pos.heliocentricfloatnullablee_kHRV[0.3/4]? Uncertainty on kinHRVkm/sstat.errorfloatnullableComp[CX] Comparison stars (8)meta.codecharG[1] Giant Flag (1= Star flagged as Giant)meta.code.errorcharFYth[ ,KLh] Youth flag(s) (10)meta.codechargroupLMoving group identification in literaturemeta.id;pos.lgr_groupL? Source of groupLit (11)meta.ref;pos.frameintnullablegroupLACEwING moving group identificationmeta.id;pos.lgq_group[0/100]? Probability of group%meta.code.qual;pos.lgintnullableFmg[1] Moving group match flag (12)meta.codecharEWsDisplay the SALT equivalent widths for this star (table 6)meta.ref.urlchar2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 1"meta.ref.urlcharAPASSDisplay the APASS-DR9 data (Henden+ 2016, II/336) within 3"meta.ref.urlcharJ/ApJ/840/87/table6SALT equivalent widths for 86 unique starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSetTarget flag ("target": young star; or "standard": flux standard, 12 occurrences)meta.notecharNameShortened Object Name; see Table 1 for UCAC4 identifiersmeta.id;meta.maincharObsDateObservation UT Datetime.epoch;obsnullableEWHa-o[-18/1] Equivalent width, H{alpha} 6563{AA}, measured on ObsDate0.1nmspect.line.eqWidth;em.line.HalphafloatEWHa-w[-18/1]? Equivalent width, H{alpha} 6563{AA}, weighted average0.1nmspect.line.eqWidth;em.line.Halpha;stat.meanfloatnullablee_EWHa-w[0.01/1.1]? Uncertainty in EWHa-w, weighted average0.1nmstat.errorfloatnullableEWLi-o[-91/409]? Equivalent width, unresolved Li 6708{AA} doublet, measured on ObsDate1e-13mspect.line.eqWidthintnullableEWLi-w[64/396]? Equivalent width, unresolved Li 6708{AA} doublet, weighted average1e-13mspect.line.eqWidth;stat.meanintnullablee_EWLi-w[1/37]? Uncertainty in EWLi-w, weighted average1e-13mstat.errorintnullableEWKI-o[-2/2] Equivalent width, K 7699{AA}, measured on ObsDate0.1nmspect.line.eqWidthfloatEWKI-w[-1/2]? Equivalent width, K 7699{AA}, weighted average0.1nmspect.line.eqWidth;stat.meanfloatnullablee_EWKI-w[0.01/0.6]? Uncertainty in EWKI-w, weighted average0.1nmstat.errorfloatnullable