J/AJ/170/135ivo://CDS.VizieR/J/AJ/170/135CDSBorissova J.Kurtev R.Escobar J.Alonso-Garcia J.Medina N.,Osses J.Guo Z.Lucas P.W.Kuhn M.Minniti D.Covey K.R.Saito R.K.,Forster F.2026-06-19T08:49:32Z2026-06-19T09:03:35ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsinfrared-photometrystar-forming-regionsvariable-starsnebulaeWe present a catalog of 652 young stellar objects (YSOs) in the Carina star-forming region. The catalog was constructed by combining near-infrared KS-band variability from the VISTA Variables in the Via Lactea eXtended survey and medium-resolution H-band spectroscopy from APOGEE-2, Sloan Digital Sky Survey IV (SDSS-IV). Variability analysis of 6.35 million sources identified 606 variable stars. The classification of the spectral lines by semisupervised K-means clustering of 704 stars, refined through comparison with known catalogs in literature and visual inspection of the spectra, was performed. Combined with KS variability, the final catalog contains three groups: Emission-line YSOs, Absorption-line YSOs, and Literature/Variable-identified YSOs. Cross validation with the Gaia DR3 proper motion and distance estimates supports Carina membership for 415 sources. The statistical characterization of YSO variability demonstrated that most Carina members (78%) exhibit variability patterns. Of these, 134 stars show emissions in their spectra, which is consistent with some accretion processes. Analysis of fundamental stellar parameters from StarHorse and Gaia DR3 reveals typical distributions of YSOs, dominated by low-mass (1-4M_{sun}_), solar-metallicity stars with temperatures between 4000 and 6000K. Only a small fraction (4%) of the sources are more massive than 4M_{sun}_, suggesting limited ongoing massive star formation in Carina. This well-characterized catalog also offers a robust training data set for machine learning applications aimed at predicting YSO behavior.2025AJ....170..135Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/170/135CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/337 : VISTA Variables in the Via Lactea Survey DR1 (Saito+, 2012)II/360 : Gaia DR2 x AllWISE catalogue (Marton+, 2019)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)III/286 : APOGEE-2 DR17 final allStar catalog (Abdurro'uf+, 2022)II/376 : VISTA Variable in the Via Lactea Survey (VVV) DR4.2 (Minniti+, 2023)J/ApJS/194/14 : A Pan-Carina YSO catalog (Povich+, 2011)J/AJ/143/70 : Differential reddening in MW globulars (Alonso-Garcia+, 2012)J/A+A/549/A67 : Embedded YSOs in Carina Nebula complex (Gaczkowski+, 2013)J/A+A/567/A109 : Carina nebula optically identified YSOs (Kumar+, 2014)J/ApJ/792/30 : NEOWISE magnitudes for near-Earth objects (Mainzer+, 2014)J/AJ/151/144 : ASPCAP weights for the 15 APOGEE chem. elements (Garcia+, 2016)J/MNRAS/458/3479 : SVM selection of WISE YSO Candidates (Marton+, 2016)J/A+A/585/A49 : VCNS II. The IR-excess-selected population (Zeidler+, 2016)J/MNRAS/465/3039 : Eruptive variable protostars from VVV EW (Contreras+, 2017)J/MNRAS/465/3011 : VVV high amplitude NIR variab. stars (Contreras Pena+, 2017)J/ApJS/236/27 : APOGEE-2 survey of Orion Complex (OSFC). I. (Cottle+, 2018)J/AJ/156/84 : APOGEE-2 survey of Orion Complex. II. (Kounkel+, 2018)J/ApJ/864/11 : The VVV Variables (V^4^) catalog (Medina+, 2018)J/A+A/620/A172 : Solar neighbourhood young stars 3D mapping (Zari+, 2018)J/MNRAS/489/2079 : Calibration of distances with deep learning (Leung+, 2019)J/A+A/638/A76 : StarHorse data for 5 surveys (Queiroz+, 2020)J/ApJ/917/23 : SPYGLASS. I. Mapping young stellar structures (Kerr+, 2021)J/AJ/162/184 : APOGEE: Properties & RVs of binaries (Kounkel+, 2021)J/ApJS/254/33 : Gal. midplane Spitzer/IRAC candidate YSOs (SPICY) (Kuhn+, 2021)J/AJ/162/282 : Untangling Galaxy. III. Pre-main-sequence stars (Mcbride+, 2021)J/AJ/162/153 : X-ray propert. of A,B-types, T-Tauri stars & YSOs (Nunez+, 2021)J/A+A/660/A11 : Gaia distances to the Carina Nebula Complex (Goeppl+, 2022)J/A+A/660/A11 : Gaia distances to the Carina Nebula Complex (Goeppl+, 2022)J/AJ/163/152 : Stellar param. for ~650000 stars with APOGEE (Sprague+, 2022)J/ApJ/942/22 : Brackett emiss. lines in young star APOGEE sp. (Campbell+, 2023)J/MNRAS/519/5271 : New ASAS-SN variable stars using g band lcs (Christy+, 2023)J/A+A/674/A39 : Gaia DR3. 95 extrasolar planets (Gaia Coll.+, 2023)J/A+A/674/A21 : KYSO - The Konkoly Optical YSO catalogue (Marton+, 2023)J/A+A/673/A155 : StarHorse data for 8 spectroscopic surveys (Queiroz+, 2023)J/AJ/166/183 : High-mass YSOs between 350 and 4000pc (Vioque+, 2023)J/A+A/689/A148 : VVVX tile coordinates (Saito+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/170/135https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/170/135http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/170/135https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/170/135https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/170/135http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/170/135GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/170/135/table4 (Catalog of YSOs in Carina star forming region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/170/135/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/170/135/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/170/135/table4?GETtext/xml+votable180.050000true158.71666306-59.388701940.0055555555555555565/9504 6/37246-37247 37332-37333 37335 37930-37931 37934 380208.643406281242892e-20 9.976379296888241e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/170/135?format=asciiInfrareddefaultJ/AJ/170/135/table4Catalog of YSOs in Carina star forming regionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2M[2M]meta.id.part;meta.mainchar2MASS2MASS identifier (HHMMSSss+DDMMSSs) (ID)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainKsmag[10.5/17]? Mean Ks magnitude from the VISTA Variables in the Via Lactea eXtended (VVVX, J/A+A/689/A148) survey (Ksmean)magphot.mag;em.IR.KfloatnullabledKsmag[0.1/2.4]? Difference between Ks min and Ks max (Ksdelta)magphot.mag;arith.difffloatnullableSimbadNameSimbad column added by the CDSmeta.idcharnullableKsAmp[0.08/2.3]? Difference between median of 5 percent brighter and 5 percent fainter pointsmagsrc.var.amplitude;phot.mag;em.IR.KfloatnullableKsVar[0.001/0.73]? Variance of the Ks magnitudemagstat.variance;phot.mag;em.IR.KfloatnullableKsStd[0.028/0.86]? Standard deviation of the Ks magnitudemagstat.stdev;phot.mag;em.IR.KfloatnullableKsSkew[-2.5/2.2]? Skewness of the Ks magnitudestat.fit.param;phot.mag;em.IR.KfloatnullableKsKurt[-1.8/6.5]? Kurtosis of the Ks magnitudestat.fit.param;phot.mag;em.IR.KfloatnullableKsSlope[0.002/3.8]? Slope index of the Ks magnitudestat.fit.param;phot.mag;em.IR.KfloatnullableKsGPV[0.03/1.91]? Gaussian process variability (GPV) indicator of the Ks magnitudestat.fit.param;phot.mag;em.IR.KfloatnullableKsStruct[0.03/1.25]? Structure function of the Ks magnitudestat.fit.param;phot.mag;em.IR.KfloatnullableTimeSpan[133.8/1786]? Time span of the data (KsTime)dtime.intervaldoublenullablePerBest[2/500]? Best period in days from the Lomb-Scargle periodogram (KsBest)dtime.period;meta.modelledfloatnullableFAP[0/0.92]? False alarm probability for the calculated periodstat.fit.goodnessfloatnullableNobs[4/46]? Number of observations (Num)meta.number;obsintnullableClassClass Flag (1)src.classcharFlag[1/4] Classification flag (2)meta.code.classintLitLiterature Catalogs (3)meta.refcharMass[0.2/9.92]? Stellar mass (4)solMassphys.massfloatnullablee_Mass[0.0/2.65]? Uncertainty in Mass (4)solMassstat.error;phys.massfloatnullableTeff[3297.9/21230.1]? Effective temperature (4)Kphys.temperature.effectivefloatnullablee_Teff[0/3374.8]? Uncertainty in Teff (4)Kstat.error;phys.temperature.effectivefloatnullable[Fe/H][-2.36/0.51]? Metallicity (4)phys.abund.Fefloatnullablee_[Fe/H][0/0.84]? Uncertainty in [Fe/H] (4)stat.error;phys.abund.FefloatnullableAV[-3.85/20.76]? Interstellar extinction in V (4)magphys.absorptionfloatnullablee_AV[0/3]? Uncertainty in AV (4)magstat.error;phys.absorptionfloatnullableA2Display the APOGEE-2 DR17 (III/286) data within 1.5"meta.ref.urlintnullable