J/ApJ/699/649ivo://CDS.VizieR/J/ApJ/699/649doi:10.26093/cds/vizier.16990649CDSShkolnik E.Liu M.C.Reid I.N.2017-06-02T08:37:29Z2011-07-20T09:30:57ZCDS support team

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

cds-question@unistra.frline-intensitiesstellar-spectral-typesm-starsstellar-agesstellar-distanceWe have completed a high-resolution (R~60000) optical spectroscopic survey of 185 nearby M dwarfs identified using ROSAT data to select active, young objects with fractional X-ray luminosities comparable to or greater than Pleiades members. Our targets are drawn from the "NStars" 20pc census and the "Moving-M" sample with distances determined from parallaxes or spectrophotometric relations. We limited our sample to 25pc from the Sun, prior to correcting for pre-main-sequence overluminosity or binarity. Nearly half of the resulting M dwarfs are not present in the Gliese catalog and have no previously published spectral types. We identified 30 spectroscopic binaries (SBs) from the sample, which have strong X-ray emission due to tidal spin-up rather than youth.2009ApJ...699..649Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/699/649CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/123 : Dwarf K and M stars of small proper motion (Stephenson 1986)III/259 : Stephenson's dwarf K and M stars (StKM) (Stephenson, 1986)J/A+A/325/159 : Companions to M dwarfs within 5pc (Leinert+ 1997)J/A+A/326/249 : Chromospheric models of dwarf M stars (Mauas+ 1997)J/A+A/348/897 : Ages of main-sequence stars (Lachaume+, 1999)J/AJ/126/3007 : Spectroscopy of faint red NLTT dwarfs (Reid+, 2003)J/AJ/128/463 : A preliminary 20pc census from the NLTT catalogue (Reid+, 2004)J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)J/AJ/133/2825 : Star beyond the NLTT catalog (Reid+, 2007)J/A+A/467/785 : SuperWASP/ROSAT periodic variable stars (Norton+, 2007)J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/699/649https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/699/649http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/699/649https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/699/649https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/699/649http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/699/649GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/699/649/stars (Observed M dwarfs and their quantities and stellar ages)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/699/649/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/699/649/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/699/649/stars?GETtext/xml+votable180.050000true0.9261667-28.37805560.0055555555555555566/134 265 472 483 518 636 728 847 989 1122 1138 1453 1819 1911 2425 2494 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 9747 10381 10771 10905 10988 11208 11480 11963 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 21180 21296 21420 22215 22390 22603 22683 22739 22773 22904 23094 23111 23510 23752 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 491471.398457827073138e-19 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/699/649?format=asciiOpticaldefaultJ/ApJ/699/649/starsObserved M dwarfs and their quantities and stellar agesYouthYouth index (12)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (1)meta.id;meta.maincharf_Name[j] low-resolution spectrum (2)meta.codecharTelTelescope (CFHT or Keck) (3)meta.id;instr.telcharSpTSpectral type (+/-0.5) (3)src.spTypefloatf_SpT[eh] poor S/N or seeing (4)meta.codecharl_Dist[~ ] Limit flag on Distmeta.code.errorcharDist? Distance (5)pcpos.distance;pos.heliocentricfloatnullablee_Dist? Distance uncertaintypcstat.errorfloatnullablen_Dist[gkl] oeigin of the distance (6)meta.notecharImag? USNO I-band magnitudemagphot.mag;em.opt.IfloatnullableJmag2MASS Johnson J-band magnitudemagphot.mag;em.IR.Jfloat[Fx/Fj]? ROSAT fractional X-ray flux (log scale) (7)phot.flux;em.X-rayfloatnullableBinRemarks about binarity (8)meta.notef_Bin[f] questionable binarity (9)meta.codechar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idcharCaHw? Surface gravity-sensitive indice CaH wide (10)spect.indexfloatnullableCaHn? Surface gravity-sensitive indice CaH narrow (10)spect.indexfloatnullableW(K)KI equivalent width (11)0.1nmspect.line.eqWidthfloatW(Ha)H{alpha} equivalent width (11)0.1nmspect.line.eqWidth;em.line.HalphafloatNotesYouth indicator from literaturemeta.notecharl_Age[d><~ ] Limit flag on Age (14)meta.code.error;time.agecharAgeEstimated age (13)Myrtime.ageintAge.u? Estimated age, upper limit (13)Myrtime.age;stat.maxintnullableRAJ20002MASS hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ20002MASS degree of declination (J2000)pos.eq.dec;meta.main