J/ApJ/677/401ivo://CDS.VizieR/J/ApJ/677/401doi:10.26093/cds/vizier.16770401CDSPrisinzano L.Micela G.Flaccomio E.Stauffer J.R.Megeath T.,Rebull L.Robberto M.Smith K.Feigelson E.D.Grosso N.Wolk S.2017-07-11T13:09:12Z2010-10-17T15:24:28ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsx-ray-sourcesinfrared-photometryastronomical-object-identificationopen-star-clustersThe origin and evolution of the X-ray emission in very young stellar objects (YSOs) are not yet well understood because it is very hard to observe YSOs in the protostellar phase. Using COUP data, we study the X-ray properties of stars in the ONC in different evolutionary classes: luminosities, hydrogen column densities N_H_, effective plasma temperatures, and time variability are compared to understand if the interaction between the circumstellar material and the central object can influence the X-ray emission. We have assembled the deepest and most complete photometric catalog of objects in the ONC region from the UV to 8um using data from the HST Treasury Program; deep and almost simultaneous UBVI and JHK images taken, respectively, with WFI at ESO 2.2m and ISPI at CTIO 4m telescopes; and Spitzer IRAC imaging. We select high-probability candidate Class 0-I protostars, a sample of "bona fide" Class II stars, and a set of Class III stars with IR emission consistent with normal photospheres. Our principal result is that Class 0-Ia objects are significantly less luminous in X-rays, in both the total and hard bands, than the more evolved Class II stars with mass larger than 0.5M_{sun}_; the latter show X-ray luminosities similar to those of Class 0-Ib stars.2008ApJ...677..401Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/677/401CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/574/258 : X-ray-emitting young stars in the Orion nebula (Feigelson+,J/ApJ/582/382 : Chandra X-ray sources in Orion Nebula Cluster (Flaccomio+,J/ApJ/584/911 : X-rays in the Orion nebula cluster (Feigelson+, 2003)J/AJ/130/1763 : 11.7{mu}m point sources in Orion (Smith+, 2005)J/AJ/129/1534 : Mid-IR photometry in the Orion Nebula (Robberto+, 2005)J/ApJS/160/319 : COUP: observations and source lists (Getman+, 2005)J/ApJS/160/450 : X-ray emission in Orion Nebula young stars (Flaccomio+, 2005)J/ApJ/660/704 : Optical and X-ray variability of ONC PMS (Stassun+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/677/401https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/677/401http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/677/401https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/677/401https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/677/401http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/677/401GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/677/401/NIRphot (Combined table from original tables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/677/401/NIRphot?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/677/401/NIRphot?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/677/401/NIRphot?GETtext/xml+votable180.050000true83.7093162-5.36415750.0055555555555555566/21438 21439 22804 228052.0616683193919197e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/677/401?format=asciiX-rayInfrareddefaultJ/ApJ/677/401/table14Literature Class 0/I counterpartsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequence number (<[PMF2008] NNN> in Simbad)meta.id;meta.mainintClassYSO 0-I class (a or b)src.classcharCOUP? The COUP identification number (<COUP NNNNa> in Simbad)meta.id.crossintnullableLMH00Lada et al., 2000AJ....120.3162L identification (<TPSC NN> in Simbad)meta.id.crosscharMLLA02? Muench et al., 2002, Cat. <J/ApJ/573/366> identification (<MLLA NNNNA> in Simbad)meta.id.crossintnullableSBS04? Smith et al., 2004ApJ...610L.117S identification (<SBSMH NN> in Simbad)meta.id.crossintnullableSBS04nSmith et al., 2004ApJ...610L.117S namemeta.id.crosscharSBS05? Smith et al., 2005, Cat. <J/AJ/130/1763> identificationmeta.id.crossintnullableRBP05Robberto et al., 2005, Cat. <J/AJ/129/1534> identification (<MAX NNN> in Simbad)meta.id.crosscharSimbadSimbad column added by the CDScharJ/ApJ/677/401/table1Log of the new optical-IR observations used in this workLimMagnitude limit (3)phot.magcharFieldField of viewphys.angSize;instr.fovcharRefReference (4)meta.ref;pos.frameintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsDateNight(s) of observationtime.epochcharTelTelescope usedinstr.setupcharf_Tel[d] Flag for Spitzer (1)meta.codecharCamCamera usedmeta.id;instrcharFilterFiltersmeta.code;instr.filtercharf_Filter[c] Flag for WFPC2 filters (2)meta.codecharExpExposure time per filterstime.duration;obs.exposurecharJ/ApJ/677/401/XrayCombined table from original tablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClassSimbad column added by the CDSsrc.classcharSeqSequence number (<[PMF2008] NNN> in Simbad)meta.id;meta.mainintCOUP? The COUP identification numbermeta.id.crossintnullablelogNHLog of the HI column densitylog(cm**-2)phys.columnDensityfloate_logNHUncertainty in logNHlog(cm**-2)stat.errorfloatkT1First model plasma temperaturekeVphys.temperaturefloate_kT1Uncertainty in kT1keVstat.errorfloatlogEM1Log of first model emission measurelog(cm**-3)phys.emissMeasure;meta.modelledfloate_logEM1Uncertainty in log EM1log(cm**-3)stat.errorfloatkT2? Second model plasma temperaturekeVphys.temperature;meta.modelledfloatnullablee_kT2? Uncertainty in kT2keVstat.errorfloatnullablelogEM2? Log of second model emission measurelog(cm**-3)phys.emissMeasure;meta.modelledfloatnullablee_logEM2? Uncertainty in log EM2log(cm**-3)stat.errorfloatnullablelogLhcLog of hard 2-8keV luminosity (1)log(1e-07W)phys.luminosity;em.X-rayfloatlogLtcLog of total 0.5-8keV luminosity (1)log(1e-07W)phys.luminosity;em.X-rayfloatJ/ApJ/677/401/NIRphotCombined table from original tablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClassSimbad column added by the CDSsrc.classcharSeqSequence number (<[PMF2008] NNN> in Simbad)meta.id;meta.mainintprimaryn_SeqSimbad column added by the CDSmeta.ref.urlcharCOUP? The COUP identification numbermeta.id.crossintnullableRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainJmag? 2MASS J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? 2MASS H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag? 2MASS K band magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? Uncertainty in Kmagmagstat.error;phot.mag;em.IR.Kfloatnullable3.6magSpitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloate_3.6magUncertainty in 3.6magmagstat.errorfloat4.5mag? Spitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_4.5mag? Uncertainty in 4.5magmagstat.errorfloatnullable5.8mag? Spitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_5.8mag? Uncertainty in 5.8magmagstat.errorfloatnullable8.0mag? Spitzer/IRAC 8.0 micron band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_8.0mag? Uncertainty in 8.0magmagstat.errorfloatnullableSimbadSimbad column added by the CDSchar