J/AJ/135/966ivo://CDS.VizieR/J/AJ/135/966doi:10.26093/cds/vizier.51350966CDSFlaherty K.M.Muzerolle J.2017-06-21T08:21:37Z2010-07-29T08:26:38ZCDS support team

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

cds-question@unistra.fraccretionyoung-stellar-objectsspectroscopyinfrared-photometryvisible-astronomysloan-photometryextinctionradial-velocityWe study the disk and accretion properties of young stars in the NGC 2068 and NGC 2071 clusters. Using low-resolution optical spectra, we define a membership sample and determine an age for the region of ~2Myr. Using high-resolution spectra of the H{alpha} line we study the accretion activity of these likely members and also examine the disk properties of the likely members using IRAC and MIPS mid-infrared photometry. A substantial fraction (79%) of the 67 members have an infrared excess while all of the stars with significant infrared excess show evidence for active accretion. We find three populations of evolved disks (IRAC weak, MIPS weak, and transition disks) all of which show decreased accretion activity in addition to the evidence for evolution in the dust disk.2008AJ....135..966Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/135/966CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)J/AJ/129/907 : New Ori OB1 members (Briceno+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/135/966https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/135/966http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/135/966https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/135/966https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/135/966http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/135/966GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/135/966/stars (Photometric and spectroscopic results for likely members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/135/966/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/135/966/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/135/966/stars?GETtext/xml+votable180.050000true86.339-0.01270.0055555555555555566/22873 228766.772611666688002e-21 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/135/966?format=asciiOpticalInfrareddefaultJ/AJ/135/966/starsPhotometric and spectroscopic results for likely membersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[FM2008]Object identificationmeta.id;meta.mainintprimaryn_[FM2008][a-d, ] Individual notes (1)meta.notecharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainSpRSpectral type rangesrc.spTypecharf_SpR[c] indicates continuum stars (2)meta.codecharSpT? Spectral type adoptedsrc.spTypecharEWHaH{alpha} equivalent width0.1nmspect.line.eqWidth;em.line.Halphafloatl_EWLiLimit flag on EWLimeta.code.errorcharEWLiLithium equivalent width0.1nmspect.line.eqWidthfloatOTypeT-Tauri type (CTTS or WTTS)src.classcharMSimbad column added by the CDSmeta.ref.urlcharSimbadSimbad column added by the CDSchargmag? SDSS g band magnitude (1)magphot.mag;em.opt.Bfloatnullablermag? SDSS r band magnitude (1)magphot.mag;em.opt.Rfloatnullableimag? SDSS i band magnitude(1)magphot.mag;em.opt.Ifloatnullablezmag? SDSS z band magnitude(1)magphot.mag;em.opt.IfloatnullableJmag2MASS J band magnitudemagphot.mag;em.IR.Jfloatf_Jmag[a] Unresolved source (2)meta.codecharHmag2MASS H band magnitudemagphot.mag;em.IR.HfloatKsmag2MASS K_S_ band magnitudemagphot.mag;em.IR.Kfloat3.6magSpitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloate_3.6magUncertainty in 3.6magmagstat.errorfloat4.5magSpitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloate_4.5magUncertainty in 4.5magmagstat.errorfloat5.8magSpitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloate_5.8magUncertainty in 5.8magmagstat.errorfloat8.0magSpitzer/IRAC 8.0 micron band magnitudemagphot.flux.density;em.IR.8-15umfloate_8.0magUncertainty in 8.0magmagstat.errorfloat24mag? Spitzer/MIPS 24 micron band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_24mag? Uncertainty in 24magmagstat.errorfloatnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharJ/AJ/135/966/table3Stellar parameters for likely members[FM2008]Object identificationmeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_[FM2008][a] Possible contamination (1)meta.codecharLumLuminosity (2)solLumphys.luminosityfloatTeffEffective temperature (2)Kphys.temperature.effectiveintMassMasssolMassphys.massfloatRadRadius (3)solRadphys.size.radiusfloatAvExtinctionphys.absorptionfloatf_Av[b] no available optical photometry (4)meta.codecharl_AccLimit flag on Accmeta.code.errorcharAcc? Accretion rate (5)1e-08solMass.yr**-1phys.mass.lossfloatnullablef_Acc[cn] Flag on Acc (6)meta.codecharalphaSlope of the SED in the IRAC bands (7)spect.indexfloatDiskDisk descriptor (8)meta.codecharJ/AJ/135/966/table4High-resolution spectra of likely membersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[FM2008]Object identification numbermeta.id;meta.mainintf_[FM2008][b] P Cygni profile (1)meta.codecharRV? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RV? Radial velocity uncertaintykm/sstat.errorfloatnullablel_vsiniLimit flag on vsinimeta.code.error;phys.veloc.rotatcharvsini? Rotational velocitykm/sphys.veloc.rotatfloatnullableR? Tonry & Davis (1979AJ.....84.1511T) R value (2)stat.fit.paramfloatnullableHaFW1H{alpha} full width 10%, 1st measurekm/sspect.line.widthintHaFW2? H{alpha} full width 10%, 2nd measurekm/sspect.line.widthintnullableHaEW1H{alpha} equivalent width, 1st measure0.1nmspect.line.eqWidthfloatHaEW2? H{alpha} equivalent width, 2nd measure0.1nmspect.line.eqWidthfloatnullablel_rLimit flag on rmeta.code.errorcharr? Veiling (r=F_excess_/F_cont_) over the wavelength range of 6490-6501{AA}phys.absorptionfloatnullable