J/ApJ/818/59ivo://CDS.VizieR/J/ApJ/818/59doi:10.26093/cds/vizier.18180059CDSDa Rio N.Tan J.C.Covey K.R.Cottaar M.Foster J.B.Cullen N.C.,Tobin J.J.Kim J.S.Meyer M.R.Nidever D.L.Stassun K.G.,Chojnowski S.D.Flaherty K.M.Majewski S.Skrutskie M.F.Zasowski G.,Pan K.2018-02-01T06:06:23Z2016-05-24T13:36:35ZCDS support team

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

cds-question@unistra.frmolecular-cloudseffective-temperatureinfrared-photometryyoung-stellar-objectsinfrared-astronomyspectroscopyWe present the results of the Sloan Digital Sky Survey APOGEE INfrared Spectroscopy of Young Nebulous Clusters program (IN-SYNC) survey of the Orion A molecular cloud. This survey obtained high-resolution near-infrared spectroscopy of about 2700 young pre-main-sequence stars on a ~6{deg} field of view. We have measured accurate stellar parameters (T_eff_, logg, vsini) and extinctions and placed the sources in the Hertzsprung-Russel diagram (HRD). We have also extracted radial velocities for the kinematic characterization of the population. We compare our measurements with literature results to assess the performance and accuracy of the survey. Source extinction shows evidence for dust grains that are larger than those in the diffuse interstellar medium: we estimate an average R_V_=5.5 in the region. Importantly, we find a clear correlation between HRD inferred ages and spectroscopic surface-gravity-inferred ages and between extinction and disk presence; this strongly suggests a real spread of ages larger than a few Myr. Focusing on the young population around NGC 1980/{iota} Ori, which has previously been suggested to be a separate, foreground, older cluster, we confirm its older (~5Myr) age and low A_V_, but considering that its radial velocity distribution is indistinguishable from Orion A's population, we suggest that NGC 1980 is part of Orion A's star formation activity. Based on their stellar parameters and kinematic properties, we identify 383 new candidate members of Orion A, most of which are diskless sources in areas of the region poorly studied by previous works.2016ApJ...818...59Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/818/59CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/807/27 : IN-SYNC. III. RVs of IC348 stars (Cottaar+, 2015)J/ApJ/799/136 : IN-SYNC. II. Candidate young stars in NGC 1333 (Foster+, 2015)J/ApJ/794/125 : IN-SYNC. I. APOGEE stellar parameters (Cottaar+, 2014)J/A+A/566/A45 : Orion optical-depth and column-density maps (Lombardi+, 2014)J/ApJ/786/29 : Catalog of distances to molecular clouds (Schlafly+, 2014)J/A+A/564/A29 : Optical and near-infrared photometry in Orion A (Bouy+, 2014)J/AJ/146/85 : Spectral types of optical stars in ONC (Hillenbrand+, 2013)J/ApJS/207/10 : HST Treasury Program on the ONC (Robberto+, 2013)J/ApJS/207/5 : YSOs in LDN 1641 with Hectochelle spectra (Fang+, 2013)J/ApJ/769/149 : IR spectroscopy in Orion A: transitional disks (Kim+, 2013)J/ApJ/768/99 : X-ray survey of YSOs in Orion A (Pillitteri+, 2013)J/ApJ/767/36 : APEX observations of HOPS protostars (Stutz+, 2013)J/ApJ/764/114 : BVRI photometry of stars in Orion A (Hsu+, 2013)J/AJ/144/192 : Spitzer survey of Orion A & B. I. YSO catalog (Megeath+, 2012)J/ApJ/752/59 : Low-mass population in L1641 (Hsu+, 2012)J/ApJ/748/14 : ONC population data from WFI observations (Da Rio+, 2012)J/ApJ/722/1092 : Optical photometry of the ONC. II. (Da Rio+, 2010)J/AJ/139/950 : JHKs photometry in ONC (Robberto+, 2010)J/A+A/504/461 : YSOs in L1630N and L1641 (Fang+, 2009)J/ApJ/697/1103 : Kinematics of Orion Nebula Cluster (Tobin+, 2009)J/ApJ/677/401 : Xray properties of protostars in ONC (Prisinzano+, 2008)J/ApJ/676/1109 : Star velocities in the Orion Nebula Cluster (Furesz+, 2008)J/ApJS/160/353 : Membership of the Orion nebula population (Getman+, 2005)J/AJ/129/363 : Spectroscopy in Orion Nebula Cluster (Sicilia-Aguilar+, 2005)J/AJ/128/787 : Chandra Orion flanking fields data (Ramirez+, 2004)J/AJ/113/1733 : Orion Nebula Cluster population (Hillenbrand 1997)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/818/59https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/818/59http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/818/59https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/818/59https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/818/59http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/818/59GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/818/59/pmsstars (Fitted stellar parameters and additional quantities (tables 4 and 5))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/818/59/pmsstars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/818/59/pmsstars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/818/59/pmsstars?GETtext/xml+votable180.050000true83.141625-4.74879170.0055555555555555566/21400 21402 21403 21406 21425 21427 21428 21430 21433 21435 21436 21438 21439 22804 22805 22807 22848 228501.1166583743361574e-19 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/818/59?format=asciiInfrareddefaultJ/ApJ/818/59/pmsstarsFitted stellar parameters and additional quantities (tables 4 and 5)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[5] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[4/9] Degree of Declination (J2000)pos.eq.dec;meta.mainEpoch[1/18] Epoch number of the observationmeta.numberintTeff[2850/7001] Fitted effective temperatureKphys.temperature.effective;meta.modelleddoublee_Teff[0.1/6079] Uncertainty in TeffKstat.error;phys.temperature.effectivedoublelog(g)[-0.5/5.5] Fitted log surface gravitylog(cm.s**-2)phys.gravity;meta.modelledfloate_log(g)[0.001/7.2] Uncertainty in log(g)log(cm.s**-2)stat.errorfloatvsin(i)[0.01/2387] Fitted projected rotational velocitykm/sphys.veloc.rotat;meta.modelleddoublee_vsin(i)[0.04/2509] Uncertainty in vsin(i)km/sstat.errordoubleJmag[6.1/15.8] The 2MASS J band magnitudemagphot.mag;em.IR.Jfloate_Jmag[0/10] Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatHmag[6.2/12.5] The 2MASS H band magnitudemagphot.mag;em.IR.Hfloate_Hmag[0.01/0.5] Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatAv[-15.7/27.9] The V band extinction (1)magphys.absorption;em.opt.Vfloate_Av[0.2/82.5] Uncertainty in Avmagstat.errorfloatMCatDisplay data from Megeath+, 2012, J/AJ/144/192, within 1"meta.ref.urlintnullablelogL[-3.3/2.2] Log luminositylog(solLum)phys.luminosityfloate_logL[0.03/8.1] Uncertainty in logLlog(solLum)stat.errorfloatlogA[5/8.2]? Log agelog(yr)time.agefloatnullablee_logA[0/1.9]? Uncertainty in logAlog(yr)stat.errorfloatnullableMass[0.1/5.1]? MasssolMassphys.massfloatnullablee_Mass[0/3]? Uncertainty in MasssolMassstat.error;phys.massfloatnullableOMm[0/1] Literature membership from optical spectra (0=No, 1=Yes) (1)meta.code.memberintIRMm[0/1] Literature membership from IR excess (1)meta.code.memberintXMm[0/1] Literature membership from X-ray (1)meta.code.memberintnMm[0/1] New candidate member (0=No, 1=Yes) (1)meta.code.memberint2MDisplay the 2MASS data (Cutri+, 2003, II/246) within 1"meta.ref.urlchar