J/MNRAS/494/2429ivo://CDS.VizieR/J/MNRAS/494/2429doi:10.26093/cds/vizier.74942429CDSBinks A.S.Jeffries R.D.Wright N.J.2024-08-21T20:14:05Z2020-08-31T17:58:42ZCDS support team

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

cds-question@unistra.frlate-type-starsspectroscopystellar-agesline-intensitiesIn the last three decades several hundred nearby members of young stellar moving groups (MGs) have been identified, but there has been less systematic effort to quantify or characterize young stars that do not belong to previously identified MGs. Using a kinematically unbiased sample of 225 lithium-rich stars within 100 pc, we find that only 50+/-10 per cent of young (<=125Myr), low-mass (0.5<M/M_{sun}_<1.0) stars, are kinematically associated with known MGs. Whilst we find some evidence that five of the non-MG stars may be connected with the Lower Centaurus-Crux association, the rest form a kinematically 'hotter' population, much more broadly dispersed in velocity, and with no obvious concentrations in space. The mass distributions of the MG members and non-MG stars are similar, but the non-MG stars may be older on average. We briefly discuss several explanations for the origin of the non-MG population.2020MNRAS.494.2429Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/494/2429CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/494/2429https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/494/2429http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/494/2429https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/494/2429https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/494/2429http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/494/2429GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/494/2429/table1 (Data for all nearby, likely young stars (NLYS) discussed in the paper)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/494/2429/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/494/2429/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/494/2429/table1?GETtext/xml+votable180.050000true3.4708333-74.68827780.0055555555555555566/129 674 1118 1245 1457 2512 2881 2949 3210 3493 3888 6735 7078 9724 10246 11758 13187 13266 13405 13674 13684 13769 14593 16348 16426 17080 17288 17552 18344 18564 18745 19540 19791 19888 19948 20129 20492 20508 20510 20610 20618 20639 20645 20650 20706 20747 21963 22908 22964 23029 23132 23596 24110 24280 24608 24763 25347 25725 28746 28784 28849 28875 28903 29187 29226 29357 29378 29519 29547 29999 30317 30909 30914 31286 31439 31873 32474 32651 32836 32937 33095 33116 33312 33439 33500 33565 33583 33691 33694 33707 33716 33850 34008 34012 34043 34074 34118 34126 34163 34436 34450 34468 34586 34829-34830 34886 34909 34930 35018 35042 35123 35248 35732 35853 36158 36899 36928 36963 37006 37012-37013 37075 37125 37177 37238 37248 37414 37419 37494 37508 37583 37652 37688 37824 37970 38061 38137 38168 38341 38359 38363 38382 38687 38742 38910 39044 39123 39310 39464 39489 39524 39579 39616 40079 40251 40264 41128 41158 41184 41295 41380 41481 41528 41568 41670 41798 41952 42021 42034 42096 42222 42401 42607 42671 42708 42751 42815 42873 42966 43028 43091 43181 43219 43433 43670 43704 43882 44021 44116 44149 44291 44303 44316 44583 44830 45072 45108 45336 45351 45382 45544 45927 45944 46383 46598 46656 46717 46788 47120 47863 48038 48061 48159 48163 48904-48905 489518.650015785639275e-20 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/494/2429?format=asciidefaultJ/MNRAS/494/2429/table1Data for all nearby, likely young stars (NLYS) discussed in the paperrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS Identifier (HHMMSSss+DDMMSSs)meta.id;meta.maincharPlxGaia DR2 Parallaxmaspos.parallaxfloate_PlxUncertainty in Plxmasstat.error;pos.parallaxfloatpmRAGaia DR2 Proper-motion in right ascension, pmRA*cosDEmas/yrpos.pm;pos.eq.radoublee_pmRAUncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEGaia DR2 Proper-motion in declinationmas/yrpos.pm;pos.eq.decdoublee_pmDEUncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatGmagGaia DR2 apparent G-band magnitudemagphot.mag;em.optfloate_GmagUncertainty in Gmagmagstat.error;phot.magfloatKsmag2MASS apparent Ks-band magnitudemagphot.mag;em.IR.Kfloate_KsmagUncertainty in Ksmagmagstat.error;phot.magfloatEWLiEquivalent width of Li-feature at 6708{AA}0.1pmspect.line.eqWidthinte_EWLi? Uncertainty in EWLi0.1pmstat.errorintnullableMassMedian mass calculated from SED fittingsolMassphys.mass;stat.medianfloatMass16Median mass - 16th percentile masssolMassphys.mass;stat.errorfloatMass84Median mass - 84th percentile masssolMassphys.mass;stat.errorfloatl_Age[>=] Lower limit (>) or measurement (=)meta.code.error;time.agecharAgeMedian age calculated from SED fittingMyrtime.age;stat.medianfloatAge16? Median age - 16th percentile ageMyrtime.age;stat.errorfloatnullableAge84? Median age - 84th percentile ageMyrtime.age;stat.errorfloatnullableUvelVelocity in direction of Galactic centrekm/sphys.veloc;pos.cartesian.xfloate_UvelUncertainty in Uvelkm/sstat.errorfloatVvelVelocity in direction of Galactic rotationkm/spos.cartesian.yfloate_VvelUncertainty in Vvelkm/sstat.errorfloatWvelVelocity in direction of Galactic North Polekm/sphys.veloc;pos.cartesian.zfloate_WvelUncertainty in Wvelkm/sstat.errorfloatRV1Radial velocity measurement 1km/sspect.dopplerVelocdoublee_RV1Uncertainty in RV1km/sstat.errorfloatRV2? Radial velocity measurement 2km/sspect.dopplerVelocdoublenullablee_RV2? Uncertainty in RV2km/sstat.errorfloatnullableRV3? Radial velocity measurement 3km/sspect.dopplerVelocdoublenullablee_RV3? Uncertainty in RV3km/sstat.errorfloatnullableRV4? Radial velocity measurement 4km/sspect.dopplerVelocdoublenullablee_RV4? Uncertainty in RV4km/sstat.errorfloatnullableRV5? Radial velocity measurement 5km/sspect.dopplerVelocdoublenullablee_RV5? Uncertainty in RV5km/sstat.errorfloatnullableRV6? Radial velocity measurement 6km/sspect.dopplerVelocdoublenullablee_RV6? Uncertainty in RV6km/sstat.errorfloatnullableRV7? Radial velocity measurement 7km/sspect.dopplerVelocfloatnullablee_RV7? Uncertainty in RV7km/sstat.errorfloatnullabler_RV1Reference for RV1 (1)meta.ref;pos.framecharr_RV2Reference for RV2 (1)meta.ref;pos.framecharr_RV3Reference for RV3 (1)meta.ref;pos.framecharr_RV4Reference for RV4 (1)meta.ref;pos.framecharr_RV5Reference for RV5 (1)meta.ref;pos.framecharr_RV6Reference for RV6 (1)meta.ref;pos.framecharr_RV7Reference for RV7 (1)meta.ref;pos.framecharRVfFinal calculated radial velocitykm/sphys.veloc;pos.heliocentricdoublee_RVfUncertainty in RVfkm/sstat.errorfloatBinflag[1/9] Flag on binarity status (2)meta.codeintchiMGMoving groups with chi-square values <2.60 (see paper for details) (3)stat.valuecharBANMGMost probable moving group membership based on the BANYAN{Sigma} codemeta.code.member;pos.lgcharBANProb? Probability of moving group membership to moving group in BANMGstat.fit.goodnessfloatnullableSurveyOriginal survey publication (1)meta.bibcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from 2MASS name (declination part)degpos.eq.dec;meta.main