J/ApJ/758/56ivo://CDS.VizieR/J/ApJ/758/56doi:10.26093/cds/vizier.17580056CDSShkolnik E.L.Anglada-Escude G.Liu M.C.Bowler B.P.Weinberger A.J.,Boss A.P.Reid I.N.Tamura M.2017-06-30T05:49:11Z2014-08-07T09:32:53ZCDS support team

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

cds-question@unistra.frlate-type-starsstellar-distanceradial-velocitystellar-agesvisible-astronomytrigonometric-parallaxWe have conducted a kinematic study of 165 young M dwarfs with ages of <~300Myr. Our sample is composed of stars and brown dwarfs with spectral types ranging from K7 to L0, detected by ROSAT and with photometric distances of <~25pc assuming that the stars are single and on the main sequence. In order to find stars kinematically linked to known young moving groups (YMGs), we measured radial velocities for the complete sample with Keck and CFHT optical spectroscopy and trigonometric parallaxes for 75 of the M dwarfs with the CAPSCam instrument on the du Pont 2.5m Telescope. Due to their youthful overluminosity and unresolved binarity, the original photometric distances for our sample underestimated the distances by 70% on average, excluding two extremely young (<~3Myr) objects found to have distances beyond a few hundred parsecs. We searched for kinematic matches to 14 reported YMGs and identified 10 new members of the AB Dor YMG and 2 of the Ursa Majoris group. Additional possible candidates include six Castor, four Ursa Majoris, two AB Dor members, and one member each of the Her-Lyr and {beta} Pic groups. Our sample also contains 27 young low-mass stars and 4 brown dwarfs with ages <~150Myr that are not associated with any known YMG. We identified an additional 15 stars that are kinematic matches to one of the YMGs, but the ages from spectroscopic diagnostics and/or the positions on the sky do not match. These warn against grouping stars together based only on kinematics and that a confluence of evidence is required to claim that a group of stars originated from the same star-forming event.2012ApJ...758...56Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/758/56CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/322 : UCAC4 Catalogue (Zacharias+, 2012)III/254 : 2nd Cat. of RVs with Astrometric Data (Kharchenko+, 2007)I/298 : LSPM-North Catalog (Lepine+ 2005)I/297 : NOMAD Catalog (Zacharias+ 2005)I/289 : UCAC2 Catalogue (Zacharias+ 2004)I/284 : The USNO-B1.0 Catalog (Monet+ 2003)I/259 : The Tycho-2 Catalogue (Hog+ 2000)III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)I/238 : Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)J/ApJS/201/19 : Hawaii Infrared Parallax Program. I. (Dupuy+, 2012)J/AJ/143/80 : Low-mass stars of beta Pic & AB Dor groups (Schlieder+, 2012)J/A+A/531/A92 : Deep all-sky census of the Hyades (Roeser+, 2011)J/MNRAS/415/563 : Elemental abundances in Hyades supercluster (De Silva+, 2011)J/A+A/524/A10 : Radial Velocity standard stars (Crifo+, 2010)J/A+A/514/A97 : Late-type stars high-resolution spectra (Lopez-Santiago+ 2010)J/A+A/512/A45 : Radial velocities of BD+20 1790 (Hernan-Obispo+, 2010)J/AJ/140/119 : {beta}Pic and AB Dor moving groups members (Schlieder+, 2010)J/ApJ/699/649 : Young M dwarfs within 25pc. Paper I. (Shkolnik+, 2009)J/A+A/499/129 : Old MS stars in young moving groups (Lopez-Santiago+, 2009)J/MNRAS/384/1399 : Proper motions of field L and T dwarfs (Jameson+, 2008)J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)J/AJ/136/1290 : Ultracool dwarfs from the 2MASS (Reid+, 2008)J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008)J/AJ/133/2825 : Star beyond the NLTT catalog (Reid+, 2007)J/AJ/133/2524 : Spectra of young nearby stars (White+, 2007)J/AJ/133/439 : Luminosity function of M7-L8 ultracool dwarfs (Cruz+, 2007)J/A+A/460/695 : Search for Associations Containing Young stars (Torres+, 2006)J/A+A/430/165 : Radial velocities for 6691 K and M giants (Famaey+, 2005)J/other/ARA+A/42.685 : Young stars near the Sun (Zuckerman+, 2004)J/AJ/128/463 : Preliminary 20pc census from the NLTT catalogue (Reid+, 2004)J/AJ/126/2421 : 2MASS-Selected sample of ultracool dwarfs (Cruz+, 2003)J/ApJ/582/1011 : Revised NLTT Catalog (Salim+, 2003)J/AJ/126/3007 : Spectroscopy of faint red NLTT dwarfs (Reid+, 2003)J/AJ/123/3356 : Palomar/MSU nearby star spec. survey. III. (Gizis+, 2002)J/AJ/123/2806 : Nearby stars in the NLTT catalogue (Reid+, 2002)J/A+A/384/925 : Compiled catalog of stellar data of Miras (Kharchenko+, 2002)J/A+A/379/976 : Moving groups late-type stars EWs + fluxes (Montes+ 2001)J/MNRAS/328/45 : Late-type stars members of young groups (Montes+, 2001)J/A+A/337/403 : Low-mass stars evolutionary models (Baraffe+ 1998)J/ApJ/448/683 : Hyades RASS observations (Stern+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/758/56https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/758/56http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/758/56https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/758/56https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/758/56http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/758/56GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/758/56/mdwarfs (Observed M dwarfs kinematics and young moving group memberships)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/758/56/mdwarfs?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/758/56/mdwarfs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/758/56/mdwarfs?GETtext/xml+votable180.050000true0.9261667-28.37805560.005555555555555556Cone search capability for table J/ApJ/758/56/table3 (Summary of astrometric observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/758/56/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/758/56/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/758/56/table3?GETtext/xml+votable180.050000true0.9261625-28.37805560.0055555555555555566/134 265 472 483 518 636 728 847 989 1122 1138 1453 1819 1911 2425 2516 2534 2545 2660 2783 2800 2809 2844 3045 3050 3293 3347 3591 4401 4444 4468 4685 4739 4764 5387 5420 5429 5504 5659 5743 5819 5854 5998 6169 6384 6879 7147 7810 8627 8684 8690 9311 9429 9628 9747 10381 10771 10905 10988 11208 11480 13158 13355 13427 13670 13732 13736 13743 14450 14580 15355 15686 15896 16097 16577 16827 17155 17606 17607 17890 18503 18538 18743 19163 19879 19957 20084 20163 20240 20257 20282 20381 20425 20472 20473 20505 21180 21296 21420 22215 22390 22603 22683 22739 22773 22904 23094 23111 23510 23752 23895 24103 25637 26555 27438 27537 27611 27792 28087 28162 28195 29744 32089 32158 32500 32541 32650 34680 35640 36528 39829 40748 43838 44194 44386 45035 46922 48124 48361 48801 49029 49146 49147https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/758/56?format=asciiOpticaldefaultJ/ApJ/758/56/mdwarfsObserved M dwarfs kinematics and young moving group membershipsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (1)meta.id;meta.maincharprimaryf_Name[efkn] Note about binarity (2)meta.codecharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainSpT? M-class sub-type(s) (3)src.spTypecharn_SpT[hioq] Note and origin of spectral type (4)meta.notecharImag[7.8/16.8]? USNO-B1 I-band magnitudemagphot.mag;em.opt.IfloatnullableI-Ks[1.2/4.8]? I-Ks color indexmagphot.color;em.IR;em.IRfloatnullablepmRA[-799/714]? Proper motion along RAmas/yrpos.pm;pos.eq.rafloatnullablee_pmRA[0.9/20]? pmRA uncertaintymas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE[-792/433.2]? Proper motion along DECmas/yrpos.pm;pos.eq.decfloatnullablee_pmDE[0.7/22]? pmDE uncertaintymas/yrstat.error;pos.pm;pos.eq.decfloatnullabler_pmReference for proper motion (5)meta.ref;pos.framecharRV[-81/128.5]? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RV[0.1/5.3]? RV uncertaintykm/sstat.errorfloatnullablen_RV[jmp] Origin of the velocity (6)meta.notecharPlxSimbad column added by the CDSmeta.ref.urlcharDist[3/325]? Photometric distance (7)pcpos.distance;pos.heliocentricfloatnullablee_Dist[2.2/65]? Dist uncertaintypcstat.errorfloatnullableDtrig[4.9/526]? Trigonometric distancepcpos.distance;pos.heliocentricfloatnullablee_Dtrig[0.1/277]? Dtrig uncertaintypcstat.errorfloatnullablen_Dtrig[gl] Origin of parallax (8)meta.notecharPapICross-match within 3" with Paper I (Cat. J/ApJ/699/649)meta.ref.urlintnullable1RXSCross-match within 15" with the ROSAT catalogs (IX/10 and IX/29)meta.ref.urlintnullableDcChoice of the distance measurement method: pi=trigonometric or phot=photometricmeta.notecharU[-123.9/33]? U space velocity componentkm/sphys.veloc;pos.cartesian.xfloatnullablee_U[0.2/15.3]? U uncertaintykm/sstat.error;pos.cartesian.xfloatnullableV[-91.4/38.2]? V space velocity componentkm/sphys.veloc;pos.cartesian.yfloatnullablee_V[0.1/16.9]? V uncertaintykm/sstat.error;pos.cartesian.yfloatnullableW[-42.2/66.5]? W space velocity componentkm/sphys.veloc;pos.cartesian.zfloatnullablee_W[0.1/16.3]? W uncertaintykm/sstat.error;pos.cartesian.zfloatnullabledV[0.8/7.7]? Velocity modulus to YMG {Delta}v (9)km/sphys.velocfloatnullablechi2[0/12.5]? {chi}^2^ fitstat.fit.param;meta.modelledfloatnullablePm[0/98]? Probability of kinematic match%statintnullableYMGKinematic young moving group (YMG) match (10)meta.id.parentcharn_YMG[ghjk] Note on group membership (11)meta.notecharlAge[8/625]? Lower age (or age if uAge is empty)Myrtime.age;stat.minintnullableuAge[10/150]? Upper ageMyrtime.age;stat.maxintnullablel_lAges[>~ ] Limit flag on Agesmeta.code.errorcharlAges[1/300]? Lower age (or age if uAge is empty) from SLR09 (12)Myrtime.age;stat.minintnullableuAges[40/4500]? Upper age from SLR09 (12)Myrtime.age;stat.maxintnullablen_uAges[dki] Note on age estimation (11)meta.notecharQm[A B] 3-criteria membership match quality (13)meta.code.qualcharf_Qm[f] Flag on Qual (11)meta.codecharJ/ApJ/758/56/table3Summary of astrometric observationsSimbadNameSimbad column added by the CDSmeta.idcharCommCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharEpoch1? First epoch (UT)time.epochnullableEpoch2? Last epoch (UT)time.epochnullableNep[3/7]? Number of epochsmeta.numberintnullablePlx[1.4/105]? Relative parallaxmaspos.parallax.photfloatnullablef_Plx[a] Binary PSF (1)meta.codecharPlxA[1.9/105.5]? Absolute parallaxmaspos.parallax.photfloatnullablef_PlxA[a] Large error (1)meta.codechare_PlxA[0.7/5]? PlxA uncertaintymasstat.errorfloatnullablen_PlxA[a] e_PlxA fixed to 5mas (1)meta.notechar_RAPositions from SIMBAD (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD (declination part)degpos.eq.dec;meta.mainJ/ApJ/758/56/table5Young moving groups (YMGs) searched for new membersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroupGroup namemeta.id;meta.maincharUgr[-39.7/14.9] Group U component velocitykm/sphys.veloc;pos.cartesian.xfloatVgr[-27/1] Group V component velocitykm/sphys.veloc;pos.cartesian.yfloatWgr[-14/12] Group W component velocitykm/sphys.veloc;pos.cartesian.zfloatAgeGroup age rangeMyrtime.agecharDistGroup distance rangepcpos.distance;pos.heliocentriccharRefReference(s)meta.ref;pos.framecharNmNumber of members in this group (link to tables 1 and 6)meta.numberintnullableYMGYMG abbreviated name as in table 6 (column added by CDS)meta.idchar