J/ApJ/794/125ivo://CDS.VizieR/J/ApJ/794/125doi:10.26093/cds/vizier.17940125CDSCottaar M.Covey K.R.Meyer M.R.Nidever D.L.Stassun K.G.,Foster J.B.Tan J.C.Chojnowski S.D.da Rio N.Flaherty K.M.,Frinchaboy P.M.Skrutskie M.Majewski S.R.Wilson J.C.Zasowski G.2018-01-23T07:05:36Z2015-07-10T15:37:05ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-astronomyspectroscopyeffective-temperatureyoung-stellar-objectsOver two years, 8859 high-resolution H-band spectra of 3493 young (1-10Myr) stars were gathered by the multi-object spectrograph of the APOGEE project as part of the IN-SYNC ancillary program of the SDSS-III survey. Here we present the forward modeling approach used to derive effective temperatures, surface gravities, radial velocities, rotational velocities, and H-band veiling from these near-infrared spectra. We discuss in detail the statistical and systematic uncertainties in these stellar parameters. In addition, we present accurate extinctions by measuring the E(J-H) of these young stars with respect to the single-star photometric locus in the Pleiades. Finally, we identify an intrinsic stellar radius spread of about 25% for late-type stars in IC 348 using three (nearly) independent measures of stellar radius, namely, the extinction-corrected J-band magnitude, the surface gravity, and the Rsini from the rotational velocities and literature rotation periods. We exclude that this spread is caused by uncertainties in the stellar parameters by showing that the three estimators of stellar radius are correlated, so that brighter stars tend to have lower surface gravities and larger Rsini than fainter stars at the same effective temperature.2014ApJ...794..125Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/794/125CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/ApJ/799/136 : IN-SYNC. II. Cand. young stars in NGC 1333 (Foster+, 2015)J/A+A/573/A90 : STAGGER-grid of 3D stellar models. IV. (Magic+, 2015)J/AJ/148/30 : BVI photometry of 350 Pleiades stars (Kamai+, 2014)J/MNRAS/437/906 : Cl* IC 348 H 254 VRI light curves (Ripepi+, 2014)J/ApJ/779/188 : Spectra of nearby late K and M Kepler stars (Mann+, 2013)J/AJ/146/133 : Stellar data from SDSS-III APOGEE DR10 (Meszaros+, 2013)J/AJ/145/66 : Spitzer light curves of YSOs in IC 348 (Flaherty+, 2013)J/MNRAS/434/806 : Pre-main-sequence isochrones. II. SFR (Bell+, 2013)J/MNRAS/424/3178 : PMS isochrones. Pleiades benchmark (Bell+, 2012)J/A+A/539/A64 : X-ray data for IC 348 young stars (Alexander+, 2012)J/ApJ/723/684 : NIRSPEC ultracool dwarf RV survey (Blake+, 2010)J/MNRAS/408/475 : HATNet Pleiades Rotation Period Catalogue (Hartman+, 2010)J/AJ/138/703 : Deep MIPS observations of IC 348 nebula (Currie+, 2009)J/A+A/498/949 : F-K dwarfs velocities in open clusters (Mermilliod+, 2009)J/A+A/478/507 : Distances & atmospheric param. of MSU stars (Morales+, 2008)J/AJ/134/411 : Properties of IC 348 members (Muench+, 2007)J/ApJ/649/862 : IR phot. of IC 348 pre-main-sequence stars (Cieza+, 2006)J/MNRAS/358/341 : Ic photometry of IC 348 (Littlefair+, 2005)J/AJ/127/1602 : Cousins RI photometry in IC 348 (Cohen+, 2004)J/ApJ/593/1093 : IC 348 membership (Luhman+, 2003)J/ApJ/541/977 : HST observations of low-mass stars in IC 348 (Najita+, 2000)J/ApJ/525/466 : Young low-mass stars & BD* in IC 348 (Luhman+, 1999)J/ApJ/497/736 : The young cluster IC 348. (Herbig, 1998)J/A+A/335/183 : Pleiades low-mass stars rotational velocities (Queloz+ 1998)J/A+A/332/575 : Pleiades member list (Belikov+ 1998)J/ApJS/85/315 : F, G and K dwarf stars of the Pleiades (Soderblom+ 1993)http://www.sdss3.org/ : SDSS-III home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/794/125https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/794/125http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/794/125https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/794/125https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/794/125http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/794/125GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/794/125/stars (Derived stellar parameters in IC 348 and the Pleiades for each star)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/794/125/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/794/125/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/794/125/stars?GETtext/xml+votable180.050000true54.8159431.408520.0055555555555555565/115 6/472 474 475 484 485 496 497 855 861 1538 1539 1540 1542 1544 1545 15488.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/794/125?format=asciiInfraredOpticaldefaultJ/ApJ/794/125/starsDerived stellar parameters in IC 348 and the Pleiades for each starSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS identifier (HHMMSSss+DDMMSSs; J2000)meta.id;meta.maincharprimaryRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainClusterCluster name ("Pleiades" or "IC 348")meta.id.parentcharNep[1/13] Number of epochsmeta.numberintDt[0/507] Total baseline: max(Epoch)-min(Epoch)dtime.intervalfloatS/N[-0/1330] S/N of co-added spectrumstat.snrfloatTeff[400/7000] Weighted mean of the effective temperatureKphys.temperature.effective;stat.meaninte_Teff[0/956] Teff uncertaintyKstat.error;phys.temperature.effectiveintpTeff[0/1]? probability of constant Teff (1)stat.fit.goodness;src.varfloatnullablelogg[-0.5/5.5] Weighted mean of the logarithm surface gravitylog(cm.s**-2)phys.gravity;stat.meanfloate_logg[0/2] logg uncertaintylog(cm.s**-2)stat.errorfloatplogg[0/1]? probability of constant logg (1)stat.fit.goodness;src.varfloatnullablevsini[0.02/585] Weighted mean of the projected rotation velocitykm/sphys.veloc.rotat;stat.meanfloate_vsini[0.03/264] vsini uncertaintykm/sstat.error;phys.veloc.rotatfloatpvsini[0/1]? probability of constant vsin(i) (1)stat.fit.goodness;src.varfloatnullableRH[0/2.6] Weighted mean of the veiling (R_H_)phys.absorptionfloate_RH[0/1.1] RH uncertaintystat.errorfloatpRH[0/1]? probability of constant RH (1)stat.fit.goodness;src.varfloatnullableJmag[0/17.4]? 2MASS J band magnitudemagphot.mag;em.IR.JfloatnullableHmag[6.6/15] 2MASS H band magnitudemagphot.mag;em.IR.HfloatKsmag[0/14.6]? 2MASS Ks band magnitudemagphot.mag;em.IR.KfloatnullableE(J-H)[-0.4/2.7]? J-H color excess (2)magphot.color.excessfloatnullableJmag0[6.3/15.6]? Extinction-corrected apparent J magnitude (2)magphot.mag;em.IR.Jfloatnullable2MDisplay the 2MASS (Cutri et al. 2003, II/246) and 2MASS 6X (Cutri et al. 2006, II/281) data within 3"meta.ref.urlcharJ/ApJ/794/125/epochsDerived stellar parameters in IC 348 and the Pleiades per epoch for 607 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS identifier (HHMMSSss+DDMMSSs; J2000)meta.id;meta.maincharprimaryJDDate of the observationdtime.epochdoubleS/N[-0/689] Signal to noise ratiostat.snrfloatTeff[400/7000] Effective temperatureKphys.temperature.effectiveinte_Teff[0/7416] Teff uncertaintyKstat.error;phys.temperature.effectiveintoTeff[-1210/2133]? {eta}-offset of Teff (1)stat.fit.residualintnullablelogg[-0.5/5.5] Surface gravitylog(cm.s**-2)phys.gravityfloate_logg[0/6.7] logg uncertaintylog(cm.s**-2)stat.errorfloatologg[-1989/1923]? {eta}-offset of logg (1)stat.fit.residualfloatnullablevsini[0.01/2683] Rotational velocitykm/sphys.veloc.rotatfloate_vsini[0.04/8295] vsini uncertaintykm/sstat.error;phys.veloc.rotatfloatovsini? {eta}-offset of vsini (1)stat.fit.residualfloatnullableRH[0/43.1] H-band veiling (R_H_)phys.absorptionfloate_RH[0/3656] RH uncertaintystat.errordoubleoRH[-35/25]? {eta}-offset of RH (1)stat.fit.residualfloatnullable