J/A+A/622/A149ivo://CDS.VizieR/J/A+A/622/A149doi:10.26093/cds/vizier.36220149CDSGrossschedl J.E.Alves J.Teixeira P.S.Bouy H.Forbrich J.Lada C.J.,Meingast S.Hacar A.Ascenso J.Ackerl C.Hasenberger B.Kohler R.,Kubiak K.Larreina I.Linhardt L.Lombardi M.Moller T.2021-08-26T06:08:44Z2021-01-05T07:22:50ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectspre-main-sequence-starstwo-color-diagramsinfrared-sourcesinfrared-photometryprotostarsWe have extended and refined the existing young stellar object (YSO) catalogs for the Orion A molecular cloud, the closest massive star-forming region to Earth. This updated catalog is driven by the large spatial coverage (18.3deg^2^, ~950pc^2^), seeing limited resolution (~0.7''), and sensitivity (K_s_<19mag) of the ESO-VISTA near-infrared survey of the Orion A cloud (VISION). Combined with archival mid- to far-infrared data, the VISTA data allow for a refined and more robust source selection. We estimate that among previously known protostars and pre-main-sequence stars with disks, source contamination levels (false positives) are at least ~6.4% and ~2.3%, respectively, mostly due to background galaxies and nebulosities. We identify 274 new YSO candidates using VISTA/Spitzer based selections within previously analyzed regions, and VISTA/WISE based selections to add sources in the surroundings, beyond previously analyzed regions. The WISE selection method recovers about 59% of the known YSOs in Orion A's low-mass star-forming part L1641, which shows what can be achieved by the all-sky WISE survey in combination with deep near-infrared data in regions without the influence of massive stars. The new catalog contains 2980 YSOs, which were classified based on the de-reddened mid-infrared spectral index into 188 protostars, 185 flat-spectrum sources, and 2607 pre-main-sequence stars with circumstellar disks. We find a statistically significant difference in the spatial distribution of the three evolutionary classes with respect to regions of high dust column-density, confirming that flat-spectrum sources are at a younger evolutionary phase compared to Class IIs, and are not a sub-sample seen at particular viewing angles.2019A&A...622A.149Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/622/A149CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/328 : AllWISE Data Release (Cutri+, 2012)J/AJ/144/192 : Spitzer survey of Orion A & B. I. YSO catalog (Megeath+, 2012)J/ApJS/224/5 : The Herschel Orion Protostar Survey (HOPS) (Furlan+, 2016)J/A+A/587/A153 : VISION I. VISTA Orion A Survey (Meingast+, 2016)J/A+A/614/A65 : VISION II. VISTA Orion A survey (Meingast+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/622/A149https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/622/A149http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/622/A149https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/622/A149https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/622/A149http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/622/A149GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/622/A149/tablec1 (Catalog of YSO candidates and rejected YSOs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/622/A149/tablec1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/622/A149/tablec1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/622/A149/tablec1?GETtext/xml+votable180.050000true82.3473375-4.515665830.0055555555555555565/5350 5359 5701 6/21406 21425-21428 21430-21431 21433 21435 21482 22848 228508.643406281242892e-20 1.6978332528839141e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/622/A149?format=asciiInfrareddefaultJ/A+A/622/A149/tablec1Catalog of YSO candidates and rejected YSOsSimbadNameSimbad column added by the CDSmeta.idcharr_Pos[1/3] Origin of the coordinates (1)meta.ref;pos.frameintAKmethodUsed extinction method for AKIR (2)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVISTAVISTA designation (HHMMSSss+DDMMSSs)meta.idcharWISEWISE designation (JHHMMSS.ss+DDMMSS.s)meta.idcharPACSHerschel/PACS point source catalog (HPPSC) designation (HPPSCNNNA_JHHMMSS.sDDMMSS)meta.idcharIDRunning identification number from this workmeta.id;meta.mainintMGM? Source index from Megeath et al. (2012, J/AJ/144/192; 2016, J/A+A/587/A153) for MGM sourcesmeta.idintnullableHOPS? Source index from Furlan et al. (2016, J/ApJS/224/5) for HOPS sourcesmeta.idintnullableSimbadMain identification as given in the SIMBAD Astronomical Database (Wenger et al., 2000A&AS..143....9W)meta.idcharOtypeObject Type as given in SIMBADsrc.classcharJmag? J magnitude from VISTAmagphot.mag;em.IR.Jfloatnullablee_Jmag? 1sigma error of J magnitude from VISTAmagstat.error;phot.magfloatnullableHmag? H magnitude from VISTAmagphot.mag;em.IR.Hfloatnullablee_Hmag? 1sigma error of H magnitude from VISTAmagstat.error;phot.magfloatnullableKsmag? Ks magnitude from VISTAmagphot.mag;em.IR.Kfloatnullablee_Ksmag? 1sigma error of Ks magnitude from VISTAmagstat.error;phot.magfloatnullableIRAC1? IRAC1 magnitude from Spitzer/IRACmagphot.mag;em.IR.3-4umfloatnullablee_IRAC1? Error of IRAC1 magnitude from Spitzer/IRACmagstat.errorfloatnullableIRAC2? IRAC2 magnitude from Spitzer/IRACmagphot.mag;em.IR.4-8umfloatnullablee_IRAC2? Error of IRAC2 magnitude from Spitzer/IRACmagstat.errorfloatnullableIRAC3? IRAC3 magnitude from Spitzer/IRACmagphot.flux.density;em.IR.4-8umfloatnullablee_IRAC3? Error of IRAC3 magnitude from Spitzer/IRACmagstat.errorfloatnullableIRAC4? IRAC4 magnitude from Spitzer/IRACmagphot.flux.density;em.IR.8-15umfloatnullablee_IRAC4? Error of IRAC4 magnitude from Spitzer/IRACmagstat.errorfloatnullableMIPS1? MIPS1 magnitude from Spitzer/MIPSmagphot.flux.density;em.IR.15-30umfloatnullablee_MIPS1? Error of MIPS1 magnitude from Spitzer/MIPSmagstat.errorfloatnullableW1? W1 magnitude given as w1mpro in the AllWISE catalogmagphot.mag;em.IR.3-4umfloatnullablee_W1? Error of W1 magnitude given as w1sigmpro in the AllWISE catalogmagstat.errorfloatnullableW2? W2 magnitude given as w2mpro in the AllWISE catalogmagphot.mag;em.IR.4-8umfloatnullablee_W2? Error of W2 magnitude given as w2sigmpro in the AllWISE catalogmagstat.errorfloatnullableW3? W3 magnitude given as w3mpro in the AllWISE catalogmagphot.flux.density;em.IR.8-15umfloatnullableClassCog[0/1]? VISTA extension flag (3)meta.codeintnullablee_W3? Error of W3 magnitude given as w3sigmpro in the AllWISE catalogmagstat.errorfloatnullableW4? W4 magnitude given as w4mpro in the AllWISE catalogmagphot.flux.density;em.IR.15-30umfloatnullablee_W4? Error of W4 magnitude given as w4sigmpro in the AllWISE catalogmagstat.errorfloatnullablealphaKM? Observed spectral index alphaKM from 2.15 to 24 micrometer covering VISTA/Ks, the four IRAC bands, and MIPS1spect.indexfloatnullablee_alphaKM? Fitting error of alphaKMstat.errorfloatnullablealphaIM? Observed spectral index alphaIM from 3.6 to 24 micrometer covering the four IRAC bands and MIPS1spect.indexfloatnullablee_alphaIM? Fitting error of alphaIMstat.errorfloatnullablealphaIRAC? Observed spectral index alphaIRAC from 3.6 to 8 micrometer covering the four IRAC bandsspect.indexfloatnullablee_alphaIRAC? Fitting error of alphaIRACstat.errorfloatnullablealphaI2M? Observed spectral index alphaI2M from 4.5 to 24 micrometer covering three IRAC bands and MIPS1spect.indexfloatnullablee_alphaI2M? Fitting error of alphaI2Mstat.errorfloatnullablealphaI3M? Observed spectral index alphaI3M from 5.8 to 24 micrometer covering two IRAC bands and MIPS1spect.indexfloatnullablee_alphaI3M? Fitting error of alphaI3Mstat.errorfloatnullablealphaKI3? Observed spectral index alphaKI3 from 2.15 to 5.8 micrometer covering VISTA/Ks and three IRAC bandsspect.indexfloatnullablee_alphaKI3? Fitting error of alphaKI3stat.errorfloatnullablealphaKW3? Observed spectral index alphaKW3 from 2.15 to 12 micrometer covering VISTA/Ks and the first three WISE bandsspect.indexfloatnullablee_alphaKW3? Fitting error of alphaKW3stat.errorfloatnullablealphaKW? Observed spectral index alphaKW from 2.15 to 22 micrometer covering VISTA/Ks and all four WISE bandsspect.indexfloatnullablee_alphaKW? Fitting error of alphaKWstat.errorfloatnullablealphaW13? Observed spectral index alphaW13 from 3.4 to 12 micrometer covering the first three WISE bandsspect.indexfloatnullablee_alphaW13? Fitting error of alphaKW13stat.errorfloatnullablealphaWISE? Observed spectral index alphaWISE from 3.4 to 22 micrometer covering the four WISE bandsspect.indexfloatnullablee_alphaWISE? Fitting error of alphaWISEstat.errorfloatnullablealphaKW12M? Observed spectral index alphaKW12M from 2.15 to 24 micrometer covering VISTA/Ks, the first two WISE bands, and MIPS1spect.indexfloatnullablee_alphaKW12M? Fitting error of alphaKW12Mstat.errorfloatnullablealphaKM0? De-reddened spectral index alphaKM_0 from 2.15 to 24 micrometer covering VISTA/Ks, the four IRAC bands, and MIPS1spect.indexfloatnullablee_alphaKM0? Fitting error of alphaKM_0stat.errorfloatnullablealphaIM0? De-reddened spectral index alphaIM_0 from 3.6 to 24 micrometer covering the four IRAC bands and MIPS1spect.indexfloatnullablee_alphaIM0? Fitting error of alphaIM_0stat.errorfloatnullablealphaIRAC0? De-reddened spectral index alphaIRAC_0 from 3.6 to 8 micrometer covering the four IRAC bandsspect.indexfloatnullablee_alphaIRAC0? Fitting error of alphaIRAC_0stat.errorfloatnullablealphaI2M0? De-reddened spectral index alphaI2M_0 from 4.5 to 24 micrometer covering three IRAC bands and MIPS1spect.indexfloatnullablee_alphaI2M0? Fitting error of alphaI2M_0stat.errorfloatnullablealphaI3M0? De-reddened spectral index alphaI3M_0 from 5.8 to 24 micrometer covering two IRAC bands and MIPS1spect.indexfloatnullablee_alphaI3M0? Fitting error of alphaI3M_0stat.errorfloatnullablealphaKI30? De-reddened spectral index alphaKI3_0 from 2.15 to 5.8 micrometer covering VISTA/Ks and three IRAC bandsspect.indexfloatnullablee_alphaKI30? Fitting error of alphaKI3_0stat.errorfloatnullablealphaKW30? De-reddened spectral index alphaKW3_0 from 2.15 to 12 micrometer covering VISTA/Ks and the first three WISE bandsspect.indexfloatnullablee_alphaKW30? Fitting error of alphaKW3_0stat.errorfloatnullablealphaKW0? De-reddened spectral index alphaKW_0 from 2.15 to 22 micrometer covering VISTA/Ks and all four WISE bandsspect.indexfloatnullablee_alphaKW0? Fitting error of alphaKW_0stat.errorfloatnullablealphaW130? De-reddened spectral index alphaW13_0 from 3.4 to 12 micrometer covering the first three WISE bandsspect.indexfloatnullablee_alphaW130? Fitting error of alphaW13_0stat.errorfloatnullablealphaWISE0? De-reddened spectral index alphaWISE_0 from 3.4 to 22 micrometer covering the four WISE bandsspect.indexfloatnullablee_alphaWISE0? Fitting error of alphaWISE_0stat.errorfloatnullablealphaKW12M0? De-reddened spectral index alphaKW12M_0 from 2.15 to 24 micrometer covering VISTA/Ks, the first two WISE bands, and MIPS1spect.indexfloatnullablee_alphaKW12M0? Fitting error of alphaKW12M_0stat.errorfloatnullableAKHerschelThe extinction extracted from the Herschel map at the position of each sourcemagphys.absorptionfloatAKIRThe line-of-sight foreground extinction towards each source, mainly obtained by the NICER technique using VISTA NIR data. See column "AKmethod" for more detailsmagphys.absorptionfloatClassSex[0,1]? VISTA extension flag (4)meta.codedoublenullableXX-ray flag (5)meta.codecharTTST-Tauri star flag (6)meta.codecharClassMGMClassification from MGM (7)meta.codecharClassFF16Classification for HOPS sources from Furlan et al. (2016, J/ApJS/224/5) (8)meta.codecharClassLL16Classification from Lewis and Lada (2016, J/ApJ/825/91) for the 44 low-AK MGM protostarsmeta.codecharClassFangClassification from Fang et al. (2009, J/A+A/504/461; 2013, J/ApJS/207/5) for the L1641 regionmeta.codecharClassP13Classification from Pillitteri et al. (2013, J/ApJ/768/99) for the L1641 regionmeta.codecharClassYSO classification (9)meta.code.classcharClassFlag[1/4] Flag to distinguish between candidates (10)meta.codeint