J/AJ/154/191ivo://CDS.VizieR/J/AJ/154/191doi:10.26093/cds/vizier.51540191CDSJao W.-C.Henry T.J.Winters J.G.Subasavage J.P.Riedel A.R.,Silverstein M.L.Ianna P.A.2024-10-11T20:09:49Z2018-08-06T07:20:08ZCDS support team

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

cds-question@unistra.frsubdwarf-starsvisible-astronomytrigonometric-parallaxproper-motionsinfrared-photometryphotometrystellar-spectral-typesParallaxes, proper motions, and optical photometry are presented for 51 systems consisting of 37 cool subdwarf and 14 additional high proper motion systems. Thirty-seven systems have parallaxes reported for the first time, 15 of which have proper motions of at least 1"/yr. The sample includes 22 newly identified cool subdwarfs within 100 pc, of which three are within 25 pc, and an additional five subdwarfs from 100 to 160 pc. Two systems-LSR 1610-0040 AB and LHS 440 AB-are close binaries exhibiting clear astrometric perturbations that will ultimately provide important masses for cool subdwarfs. We use the accurate parallaxes and proper motions provided here, combined with additional data from our program and others, to determine that effectively all nearby stars with tangential velocities greater than 200 km/s are subdwarfs. We compare a sample of 167 confirmed cool subdwarfs to nearby main sequence dwarfs and Pleiades members on an observational Hertzsprung-Russell diagram using M_V_ versus (V-K_s_) to map trends of age and metallicity. We find that subdwarfs are clearly separated for spectral types K5-M5, indicating that the low metallicities of subdwarfs set them apart in the H-R diagram for (V-K_s_)=3-6. We then apply the tangential velocity cutoff and the subdwarf region of the H-R diagram to stars with parallaxes from Gaia Data Release 1 and the MEarth Project to identify a total of 29 new nearby subdwarf candidates that fall clearly below the main sequence.2017AJ....154..191Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/154/191CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/119 : Spectral classifications of proper motion stars (Bidelman+ 1985)III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/PASP/109/849 : Probing the LHS Catalog (Gizis+ 1997)J/AJ/123/2828 : Spectroscopy of northern NLTT stars (Cruz+, 2002)J/AJ/125/1598 : New high proper motion stars in the northern skyJ/AJ/126/2449 : Nearby ultracool dwarfs in galactic plane (Reid+, 2003)J/AJ/128/463 : A preliminary 20pc census from the NLTT catalogueJ/A+A/442/211 : Spectroscopic distances of 322 NLTT stars (Scholz+, 2005)J/AJ/129/413 : New high proper motion stars (-90<DE<-47)J/AJ/130/1658 : New high proper motion stars (-47<{delta}<00)J/PASP/117/676 : LHS faint proper-motion stars (Reid+, 2005)J/MNRAS/373/705 : Optical spectroscopy of high proper motion starsJ/AJ/133/2524 : Spectra of young nearby stars (White+, 2007)J/AJ/133/2825 : Star beyond the NLTT catalog (Reid+, 2007)J/AJ/133/2898 : New proper-motion stars (-90<DE< -47) (Finch+, 2007)J/AJ/134/252 : New nearby white dwarf systems (Subasavage+, 2007)J/AJ/141/21 : CCD distance estimates of SCR targets (Winters+, 2011)J/AJ/142/10 : New proper motion stars 0.40"/yr>pm>=0.18"/yr (Boyd+, 2011)J/AJ/142/92 : New proper motion stars with pm>=0.18"/yr (Boyd+, 2011)J/AJ/144/64 : Solar neighborhood. XXVIII. Substellar companionsJ/AJ/147/85 : Solar neighborhood. XXXIII. 45 M dwarfs (Riedel+, 2014)J/AJ/147/94 : Solar neighborhood. XXXII. L and M dwarfsJ/ApJ/784/156 : Parallaxes for 1507 nearby mid-to-late M dwarfsJ/A+A/577/A128 : CARMENES input catalogue of M dwarfs. IJ/AJ/149/5 : Solar neighborhood. XXXV. Distances to M dwarfsJ/AJ/150/6 : Solar neighborhood. XXXVI. VRI variability of M dwarfsJ/AJ/152/141 : Solar neighborhood. XXXVII. RVs for M dwarfsJ/other/RAA/16.G7 : Nearby M subdwarfs from LAMOST DR2 (Bai+, 2016)J/AJ/153/14 : Solar neighborhood XXXVIII. Nearby M dwarf systemsJ/AJ/154/32 : Solar neighborhood. XXXIX. Nearby white dwarfsJ/AJ/154/124 : M dwarfs-long-term photometric variabilityJ/AJ/154/151 : The solar neighborhood .XXXX. New young starshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/154/191https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/154/191http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/154/191https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/154/191https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/154/191http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/154/191GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/154/191/table12 (Astrometry (table 1) , photometry and spectroscopy results (table 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/154/191/table12?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/154/191/table12?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/191/table12?GETtext/xml+votable180.050000true3.889625-35.19655560.005555555555555556Cone search capability for table J/AJ/154/191/table4 (Subdwarf Candidates Selected from MEarth)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/154/191/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/154/191/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/191/table4?GETtext/xml+votable180.050000true55.6252512.52116670.0055555555555555566/265 291 367 427 796 807 865 1263 1552 2442 2545 2608 2650 2707 2972 4157 4468 4519 4537 4931 7681 7963 8075 8402 9433 9534 11734 12119-12120 12300 12925 13773 14919 15576 15594 15681 15726 16407 16619 16736 17830 18368 19966 21691 22284 23356 23375 23567 23636 23687 23702 24338 25226 25861 26445 26936 27290 28060 28419 29848 31309 32229 32608 32658 33381 33984 34561 34939 35841 37020 37267 39148-39149 40182 40387 41816 42048 42055 42060 42302 43385 43444 43576 44040 44299 44585 44632 44810 44814 45930 46540 46867 46978 47138 47912 484708.650015785639275e-20 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/154/191?format=asciiOpticalInfrareddefaultJ/AJ/154/191/table12Astrometry (table 1) , photometry and spectroscopy results (table 2)SpTypeSpectral type (2)src.spTypecharf_Nsea[cs] Flag on Nsea (3)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeParallax type (1)meta.codecharNameSource identifiermeta.id;meta.maincharRAJ2000? Hour of Right Ascension (J2000)pos.eq.ra;meta.mainnullableDEJ2000? Degree of Declination (J2000)pos.eq.dec;meta.mainnullableFilter[VRI ] Filter usedinstr.setup;instr.filtercharNsea[3/12]? Number of seasons observed (2)meta.numberintnullableNfrm[27/177]? Number of frames used in reductionsmeta.numberintnullableStart[1999.5/2011.5]? Start of observational coverageyrtime.start;obsfloatnullableEnd[2003.25/2016.47]? End of observational coverageyrtime.end;obsfloatnullableNyr[2.17/14.99]? Number of years of coveragemeta.numberfloatnullableNref[6/13]? Number of reference starsmeta.idintnullableRplx[3.38/87.06]? Relative parallaxmaspos.parallax.trigfloatnullablee_Rplx[0.46/2.54]? Uncertainty in Rplxmasstat.errorfloatnullableCplx[0.31/4.27]? Parallax correctionmasarith.factorfloatnullablee_Cplx[0.02/0.9]? Uncertainty in Cplxmasstat.errorfloatnullableAplx[3.87/88.66]? Absolute parallaxmaspos.parallax.trigfloatnullablee_Aplx[0.48/2.61]? Uncertainty in Aplxmasstat.errorfloatnullablepm[182.1/3495.1]? Proper motionmas/yrpos.pmfloatnullablee_pm[0.2/2.8]? Uncertainty in pmmas/yrstat.errorfloatnullablePA[9/324.8]? Position angle of proper motiondegpos.pm;pos.posAngfloatnullablee_PA[0.01/0.85]? Uncertainty in PAdegstat.errorfloatnullableVtan[41.9/486.5]? Derived tangential velocitykm/sphys.veloc.transversefloatnullableNote[!] Additional note (4)meta.notecharONameOther common identifiermeta.idcharVmag[11.49/20.25]? CTIO Johnson V band magnitudemagphot.mag;em.opt.Vfloatnullablef_Vmag[J] Flag on Vmag (1)meta.codecharRmag[10.49/19.3] CTIO Cousins R band magnitudemagphot.mag;em.opt.Rfloatf_Rmag[J] Flag on Rmag (1)meta.codecharImag[9.31/18.34] CTIO Cousins I band magnitudemagphot.mag;em.opt.Ifloatf_Imag[J] Flag on Imag (1)meta.codecharNum[1/4] Number of VRI observation(s)meta.numberintsigma[0.0061/0.1282]? Variability in Filtermagsrc.var.amplitudefloatnullableJmag[8.13/14.44]? 2MASS J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0.02/0.04]? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.Jfloatnullablef_Jmag[J] Flag on Jmag (1)meta.codecharHmag[7.61/14.12]? 2MASS H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag[0.02/0.06]? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.Hfloatnullablef_Hmag[J] Flag on Hmag (1)meta.codecharKsmag[7.36/13.97]? 2MASS K_s_ band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag[0.02/0.06]? Uncertainty in Ksmagmagstat.error;phot.mag;em.IR.Kfloatnullablef_Ksmag[J] Flag on Ksmag (1)meta.codecharRef[1/16] Reference code (3)meta.noteintSimbadNameSimbad column added by the CDSmeta.idcharJ/AJ/154/191/table4Subdwarf Candidates Selected from MEarthrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroup[ABCD] Subdwarf group (1)meta.codecharRAJ2000Hour of Right Ascension (J2000) (2)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (2)pos.eq.dec;meta.mainNameSource identifiermeta.id;meta.maincharONameAlternative source identifiermeta.idchargmag[11.2/19.05]? g band magnitudemagphot.mag;em.opt.Bfloatnullablermag[10.6/17.65]? r band magnitudemagphot.mag;em.opt.RfloatnullableVmag[7.61/18.24]? Johnson V band magnitudemagphot.mag;em.opt.VfloatnullableV-Ks[1.7/18.24]? V-K_s_ color indexmagphot.color;em.opt.V;em.IR.KfloatnullableKsMag[3.54/10.08]? Absolute K_s_ band magnitudeinstr.bandpassfloatnullableSpTypeSpectral typesrc.spTypecharRef[1/11]? Reference (3)meta.ref;pos.frameintnullableComCommentmeta.notecharSimbadNameSimbad column added by the CDSmeta.idchar