J/ApJS/208/9ivo://CDS.VizieR/J/ApJS/208/9doi:10.26093/cds/vizier.22080009CDSPecaut M.J.Mamajek E.E.2017-10-13T15:41:13Z2013-10-28T09:57:17ZCDS support team

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

cds-question@unistra.frinfrared-photometryvisible-astronomybroad-band-photometrystellar-spectral-typespre-main-sequence-starsstellar-associationsWe present an analysis of the intrinsic colors and temperatures of 5-30 Myr old pre-main-sequence (pre-MS) stars using the F0- through M9-type members of nearby, negligibly reddened groups: the {eta} Cha cluster, the TW Hydra Association, the {beta} Pic Moving Group, and the Tucana-Horologium Association. To check the consistency of spectral types from the literature, we estimate new spectral types for 52 nearby pre-MS stars with spectral types F3 through M4 using optical spectra taken with the SMARTS 1.5 m telescope. Combining these new types with published spectral types and photometry from the literature (Johnson-Cousins BVI_C_, 2MASS JHK_S_ and WISE W1, W2, W3, and W4), we derive a new empirical spectral type-color sequence for 5-30 Myr old pre-MS stars. Colors for pre-MS stars match dwarf colors for some spectral types and colors, but for other spectral types and colors, deviations can exceed 0.3 mag. We estimate effective temperatures (T_eff_) and bolometric corrections (BCs) for our pre-MS star sample through comparing their photometry to synthetic photometry generated using the BT-Settl grid of model atmosphere spectra. We derive a new T_eff_ and BC scale for pre-MS stars, which should be a more appropriate match for T Tauri stars than often-adopted dwarf star scales. While our new T_eff_ scale for pre-MS stars is within =~100K of dwarfs at a given spectral type for stars <G5, for G5 through K6, the pre-MS stars are ~250 K cooler than their MS counterparts. Lastly, we present (1) a modern T_eff_, optical/IR color, and BC sequence for O9V-M9V MS stars based on an extensive literature survey, (2) a revised Q-method relation for dereddening UBV photometry of OB-type stars, and (3) introduce two candidate spectral standard stars as representatives of spectral types K8V and K9V.2013ApJS..208....9Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/208/9CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/311 : WISE All-Sky Data Release (Cutri+ 2012)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)III/150 : Perkins Revised MK Types for the Cooler Stars (Keenan+ 1989)III/135 : Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)III/123 : Dwarf K and M stars of small proper motion (Stephenson 1986)III/13 : Vyssotsky's Catalogues 1950.0 (Vyssotsky+ 1943-58)J/AJ/143/134 : Cand. members of {beta} Pic/AB Dor groups (McCarthy+, 2012)J/MNRAS/403/1949 : UBV(RcIc)JHK photometry of HIP nearby stars (Koen+, 2010)J/ApJ/699/649 : Young M dwarfs within 25pc. I. (Shkolnik+, 2009)J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006)J/A+A/460/695 : Search for Associations Containing Young stars (Torres+, 2006)J/other/ARA+A/42.685 : Young stars near the Sun (Zuckerman+, 2004)J/AJ/105/1962 : K and M stars photometry (Weis, 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/208/9https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/208/9http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/208/9https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/208/9https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/208/9http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/208/9GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/208/9/table1 (Spectral types and optical/near-IR photometry for young, nearby, moving group members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/208/9/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/208/9/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/208/9/table1?GETtext/xml+votable180.050000true1.4689583-41.75302780.005555555555555556Cone search capability for table J/ApJS/208/9/table9 (Teff, bolometric magnitudes, bolometric corrections, and angular diameter estimates from SED fitting)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/208/9/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/208/9/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/208/9/table9?GETtext/xml+votable180.050000true1.4689583-41.75302780.0055555555555555566/46 129 674 722 765 940 1245 1787 4468 5677 13450 16606 16719 17288 19888 20491 20591 20609 21386 22146 22773 22964 23176 23388 24580 24608 24629 24644 24716 24719 24740 24763 25113 28746 28784 29357 32844 33312 33439 33500 33583 33694 33704 33707 33716 33850 34163 34244 34338 34406 34757 34781 34825 34829 34830 34886 34930 34998 35147 35497 36487 36907 37006 37012 37013 37414 37419 38054 38061 38199 38341 38347 38359 38363 38382 38484 38487 38687 38742 38800 38850 39044 41295 41798 42021 42096 42242 42252 43571 43575 43670 43677 43704 45351 45382 45453 45538 45544 45746 45927 45944 46922 47120 47205 47287 47626 47863 47941 47943 48038 48061 48263 48274 489058.157980699529898e-21 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/208/9?format=asciiOpticalInfrareddefaultJ/ApJS/208/9/table1Spectral types and optical/near-IR photometry for young, nearby, moving group membersNameStar namemeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSimbad column added by the CDSmeta.ref.urlcharGrpGroup identifier (1)meta.idchar2MASS2MASS identifier (HHMMSSss+DDMMSSs)meta.id.crosscharSpTMK spectral typesrc.spTypecharr_SpT[1/38] Reference on SpT (see refs.dat file)meta.ref;pos.frameintVmag[5.22/21.46]? Johnson V band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag[0.01/0.1]? Uncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatnullableB-V[0.28/1.73]? Johnson color index B-Vmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? Uncertainty in B-Vmagstat.error;phot.color;em.opt.BfloatnullableV-Ic[0.33/3.76]? Johnson-Cousins color index V-Icmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-Ic? Uncertainty in V-Icmagstat.error;phot.color;em.opt.VfloatnullableORefOptical photometry reference(s) (see refs.dat file)meta.bibcharJmag[5.26/15.35]? 2MASS J band magnitude (3)magphot.mag;em.IR.Jfloatnullablee_Jmag? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag[4.83/14.54]? 2MASS H band magnitude (3)magphot.mag;em.IR.Hfloatnullablee_Hmag? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKsmag[4.53/13.73]? 2MASS Ks band magnitude (3)magphot.mag;em.IR.Kfloatnullablee_Ksmag? Uncertainty in Ksmagmagstat.error;phot.mag;em.IR.Kfloatnullablef_Ksmag[d] Ksmag excluded (4)meta.codecharW1mag[4.49/12.31]? WISE W1 band magnitude (5)magphot.mag;em.IR.3-4umfloatnullablee_W1mag? Uncertainty in W1magmagstat.error;phot.magfloatnullablef_W1mag[d] W1mag excluded (4)meta.codecharW2mag[6.05/11.63]? WISE W2 band magnitude (5)magphot.mag;em.IR.4-8umfloatnullablee_W2mag? Uncertainty in W2magmagstat.error;phot.magfloatnullablef_W2mag[d] W3mag excluded (4)meta.codecharW3mag[3.10/11.32]? WISE W3 band magnitude (5)magphot.flux.density;em.IR.8-15umfloatnullablee_W3mag? Uncertainty in W3magmagstat.error;phot.magfloatnullablef_W3mag[d] W3mag excluded (4)meta.codecharW4mag[0.19/9.75]? WISE W4 band magnitude (5)magphot.flux.density;em.IR.15-30umfloatnullablee_W4mag? Uncertainty in W4magmagstat.error;phot.magfloatnullablef_W4mag[d] W4mag excluded (4)meta.codecharWISECross-match with the WISE catalog (Cat. II/311) within 2.5"meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.refchar_RAPositions from 2MASS names (right ascension part)degpos.eq.ra;meta.main_DEPositions from 2MASS names (declination part)degpos.eq.dec;meta.mainJ/ApJS/208/9/table3Observations and new spectral typesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharm_Name[AB ] Multiplicity index on Namemeta.code.multipcharf_Name[abc] Individual notes (1)meta.codecharSpTMk spectral type from this worksrc.spTypecharCoverSpectral coverage (Red/blue)instr.bandpasscharSpTlMK spectral type from literaturesrc.spTypecharRef[41/55] Reference code (see refs.dat file)meta.noteintJ/ApJS/208/9/table9Teff, bolometric magnitudes, bolometric corrections, and angular diameter estimates from SED fittingrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject name (1)meta.id;meta.mainchar2MASS2MASS identifiermeta.id.crosscharTeff1[2118/7275] BT-Settl effective temperature (2)Kphys.temperature.effectiveinte_Teff1Uncertainty in Teff1Kstat.errorintDiam1[46/790] BT-Settl angular diameter ({theta})uarcsecphys.angSizeinte_Diam1Uncertainty in Diam1uarcsecstat.errorintBCV1? BT-Settl V band bolometric correctionmagphot.mag.bcfloatnullablee_BCV1? Uncertainty in BCV1magstat.errorfloatnullableBCJ1[0.4/2.1] BT-Settl J band bolometric correctionmagphot.mag.bcfloate_BCJ1Uncertainty in BCJ1magstat.errorfloatmbol1[5.2/15.7] BT-Settl apparent bolometric magnitudemagphot.mag.bolfloate_mbol1Uncertainty in mbol1magstat.errorfloatlogL1[-2.75/0.88]? BT-Settl log luminositylog(solLum)phys.luminosityfloatnullablee_logL1? Uncertainty in logL1log(solLum)stat.errorfloatnullablen_logL1[abc] Reference of parallax used for logL1 (3)meta.notecharTeff2[3572/7251]? Kurucz effective temperature (2)Kphys.temperature.effectiveintnullablee_Teff2? Uncertainty in Teff2Kstat.errorintnullableDiam2[89/753]? Kurucz angular diameter ({theta})uarcsecphys.angSizeintnullablee_Diam2? Uncertainty in Diam2uarcsecstat.errorintnullableBCV2? Kurucz V band bolometric correctionmagphot.mag.bcfloatnullablee_BCV2? Uncertainty in BCV2magstat.errorfloatnullableBCJ2[0.5/1.9]? Kurucz J band bolometric correctionmagphot.mag.bcfloatnullablee_BCJ2? Uncertainty in BCJ2magstat.errorfloatnullablembol2[5.2/11.3]? Kurucz apparent bolometric magnitudemagphot.mag.bolfloatnullablee_mbol2? Uncertainty in mbol2magstat.errorfloatnullablelogL2[-1.14/0.87]? Kurucz log luminositylog(solLum)phys.luminosityfloatnullablee_logL2? Uncertainty in logL2log(solLum)stat.errorfloatnullablen_logL2[a] Reference of parallax used for logL2 (3)meta.notechar_RAPositions from 2MASS names (right ascension part)degpos.eq.ra;meta.main_DEPositions from 2MASS names (declination part)degpos.eq.dec;meta.mainJ/ApJS/208/9/table4Synthetic color indices from BT-Settl and ATLAS9 modelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTeff[1400/50000] Effective temperatureKphys.temperature.effectiveintlogg[3/5] Surface gravitylog(cm.s**-2)phys.gravityfloatU-B[-1.194/4.978] Johnson color index U-Bmagphot.color;em.opt.U;em.opt.BfloatB-V[-0.945/3.376] Johnson color index B-Vmagphot.color;em.opt.B;em.opt.VfloatV-Ic[-0.344/8.421] Johnson-Cousins color index V-Icmagphot.color;em.opt.V;em.opt.IfloatRc-Ic[-0.219/3.433] Johnson-Cousins color index Rc-Icmagphot.color;em.opt.R;em.opt.IfloatJ-H[-0.132/1.916] 2MASS color index J-Hmagphot.color;em.IR.J;em.IR.HfloatH-Ks[-0.11/1.344] 2MASS color index H-K_s_magphot.color;em.IR.H;em.IR.KfloatV-Ks[-1.035/14.184] Johnson-2MASS color index V-Ksmagphot.color;em.opt.V;em.IR.KfloatKs-W1[-0.085/1.379] 2MASS-WISE color index K_s_-W1magphot.color;em.IR;em.IRfloatKs-W2[-0.142/1.967] 2MASS-WISE color index K_s_-W2magphot.color;em.IR;em.IRfloatKs-W3[-0.241/2.652] 2MASS-WISE color index K_s_-W3magphot.color;em.IR;em.IRfloatKs-W4[-0.325/2.921] 2MASS-WISE color index K_s_-W4magphot.color;em.IR;em.IRfloatV-Vt[-0.42/1.09] Johnson-Tycho color index V-Vtmagphot.color;em.opt;em.optfloatBt-Vt[-0.37/4.05] Johnson-Tycho color index B-Btmagphot.color;em.opt;em.optfloatV-Hp[-0.18/3.19] Johnson-Hipparcos color index V-Hpmagphot.color;em.opt;em.optfloatModelSynthetic model source (ATLAS9 or BT-Sett1) (1)stat.param;meta.modelledcharJ/ApJS/208/9/table5Intrinsic colors of O9-M9 dwarfs and adopted Teff, bolometric correction valuesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpTMK spectral typesrc.spTypecharTeff[2450/34000] Effective temperatureKphys.temperature.effectiveintBCV[-5.73/0] The V band bolometric correctionmagphot.mag.bcfloatU-B[-1.114/1.433]? Johnson color index U-Bmagphot.color;em.opt.U;em.opt.BfloatnullableB-V[-0.318/2.13]? Johnson color index B-Vmagphot.color;em.opt.B;em.opt.VfloatnullableV-Rc[-0.115/2.18]? Johnson-Cousins color index V-Rcmagphot.color;em.opt.V;em.opt.RfloatnullableV-Ic[-0.369/4.6] Johnson-Cousins color index V-Icmagphot.color;em.opt.V;em.opt.IfloatV-J[-0.765/7.617] Johnson-2MASS color index V-Jmagphot.color;em.opt.V;em.IR.JfloatV-H[-0.929/8.366] Johnson-2MASS color index V-Hmagphot.color;em.opt.V;em.IR.HfloatV-Ks[-1/8.85] Johnson-2MASS color index V-Ksmagphot.color;em.opt.V;em.IR.KfloatK-W1[0.023/0.212]? Johnson-WISE color index K-W1magphot.color;em.IR;em.IRfloatnullableK-W2[0.001/0.38]? Johnson-WISE color index K-W2magphot.color;em.IR;em.IRfloatnullableK-W3[-0.021/0.544]? Johnson-WISE color index K-W3magphot.color;em.IR;em.IRfloatnullableK-W4[0.044/0.669]? Johnson-WISE color index K-W4magphot.color;em.IR;em.IRfloatnullableJ/ApJS/208/9/table6Intrinsic colors of 5-30Myr old stars and adopted Teff, bolometric correction valuesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpTMK spectral typesrc.spTypecharTeff[2880/7280]? Effective temperatureKphys.temperature.effectiveintnullableB-V[0.28/1.65]? Johnson color index B-Vmagphot.color;em.opt.B;em.opt.VfloatnullableV-Ic[0.34/3.31]? Johnson-Cousins color index V-Icmagphot.color;em.opt.V;em.opt.IfloatnullableV-Ks[0.73/9.8] Johnson-2MASS color index V-Ksmagphot.color;em.opt.V;em.IR.KfloatJ-H[0.11/0.7] 2MASS color index J-Hmagphot.color;em.IR.J;em.IR.HfloatH-Ks[0.06/0.47] 2MASS color index H-Ksmagphot.color;em.IR.H;em.IR.KfloatKs-W1[0.04/0.49] Johnson-WISE color index Ks-W1magphot.color;em.IR;em.IRfloatKs-W2[0.03/1.05] Johnson-WISE color index Ks-W2magphot.color;em.IR;em.IRfloatKs-W3[0/1.13] Johnson-WISE color index Ks-W3magphot.color;em.IR;em.IRfloatKs-W4[0.08/0.62]? Johnson-WISE color index Ks-W4magphot.color;em.IR;em.IRfloatnullableBCV[-3.21/0.01]? The V band bolometric correctionmagphot.mag.bcfloatnullableBCJ[0.57/2.01]? The J band bolometric correctionmagphot.mag.bcfloatnullableJ/ApJS/208/9/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRef[1/55] Reference codemeta.note;meta.mainintprimaryBibCodeBibcodemeta.bib.bibcodecharAutAuthor's name(s)meta.bib.authorcharCommCommentmeta.notechar