J/ApJS/207/5ivo://CDS.VizieR/J/ApJS/207/5doi:10.26093/cds/vizier.22070005CDSFang M.Kim J.S.van Boekel R.Sicilia-Aguilar A.Henning T.,Flaherty K.2017-07-03T14:25:58Z2013-09-25T07:43:01ZCDS support team

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

cds-question@unistra.fraccretionvisible-astronomysloan-photometryinfrared-photometryyoung-stellar-objectsline-intensitiesstellar-spectral-typesstellar-agesstellar-massesWe investigate the young stellar objects (YSOs) in the Lynds 1641 (L1641) cloud using multi-wavelength data including Spitzer, WISE, the Two Micron All Sky Survey, and XMM covering ~1390 YSOs across a range of evolutionary stages. In addition, we targeted a sub-sample of YSOs for optical spectroscopy with the MMT/Hectospec and the MMT/Hectochelle. We use these data, along with archival photometric data, to derive spectral types, extinction values, masses, ages, and accretion rates. We obtain a disk fraction of ~50% in L1641. The disk frequency is almost constant as a function of stellar mass with a slight peak at log (M_*_/M_{sun}_){approx}-0.25. The analysis of multi-epoch spectroscopic data indicates that the accretion variability of YSOs cannot explain the two orders of magnitude of scatter for YSOs with similar masses. Forty-six new transition disk (TD) objects are confirmed in this work, and we find that the fraction of accreting TDs is lower than for optically thick disks (40%-45% versus 77%-79%, respectively). We confirm our previous result that the accreting TDs have a median accretion rate similar to normal optically thick disks. We confirm that two star formation modes (isolated versus clustered) exist in L1641. We find that the diskless YSOs are statistically older than the YSOs with optically thick disks and the TD objects have a median age that is intermediate between those of the other two populations. We tentatively study the star formation history in L1641 based on the age distribution and find that star formation started to be active 2-3 Myr ago.2013ApJS..207....5Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/207/5CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)II/311 : WISE All-Sky Data Release (Cutri+ 2012)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/ApJ/746/154 : Sco-Cen members spectroscopy (Pecaut+, 2012)J/A+A/533/A109 : Pisa pre-main sequence tracks and isochrones (Tognelli+, 2011)J/A+A/504/461 : Paper I. YSOs in L1630N and L1641 (Fang+, 2009)J/A+A/489/1409 : Infrared photometry and spectroscopy in L1641N (Galfalk+ 2008)J/A+A/337/403 : Low-mass stars evolutionary models (Baraffe+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/207/5https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/207/5http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/207/5https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/207/5https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/207/5http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/207/5GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/207/5/phot (Optical et IR magnitudes of the YSOs in L1641)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/207/5/phot?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/207/5/phot?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/207/5/phot?GETtext/xml+votable180.050000true84.0208333-6.71216670.005555555555555556Cone search capability for table J/ApJS/207/5/table6 (Accretion properties of the YSOs in L1641 from Hectochelle)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/207/5/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/207/5/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/207/5/table6?GETtext/xml+votable180.050000true84.0208333-6.71216670.005555555555555556Cone search capability for table J/ApJS/207/5/prop (Stellar and disk properties, masses and ages of the YSOs, in L1641)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/207/5/prop?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/207/5/prop?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/207/5/prop?GETtext/xml+votable180.050000true84.0208333-6.71216670.0055555555555555566/21403 21406 21425 21427 21428 21430 21433 21435 21436 214386.772611666688002e-21 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/207/5?format=asciiOpticalInfrareddefaultJ/ApJS/207/5/photOptical et IR magnitudes of the YSOs in L1641e_W3mag? Uncertainty in W3magmagstat.error;phot.magfloatnullableg'mag? SDSS g' band magnitude (1)magphot.mag;em.opt.BfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/1388] Running sequence numbermeta.id;meta.mainintprimarySSimbad column added by the CDSmeta.ref.urlcharRAJ2000[5] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[6/9] Degree of Declination (J2000)pos.eq.dec;meta.mainu'mag? SDSS u' band magnitude (1)magphot.mag;em.opt.Ufloatnullablee_u'mag? Uncertainty in u'magmagstat.error;phot.magfloatnullablee_g'mag? Uncertainty in g'magmagstat.error;phot.mag;em.opt.Bfloatnullabler'mag? SDSS r' band magnitude (1)magphot.mag;em.opt.Rfloatnullablee_r'mag? Uncertainty in r'magmagstat.error;phot.mag;em.opt.Rfloatnullablei'mag? SDSS i' band magnitude (1)magphot.mag;em.opt.Ifloatnullablee_i'mag? Uncertainty in i'magmagstat.error;phot.mag;em.opt.Ifloatnullablez'mag? SDSS z' band magnitude (1)magphot.mag;em.opt.Ifloatnullablee_z'mag? Uncertainty in z'magmagstat.error;phot.mag;em.opt.IfloatnullableINS1Instrument used to obtain ugriz photometry (1)meta.id;instrcharJmag[8.08/17.51]? UKIDSS J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0.01/0.32]? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? UKIDSS H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKsmag[5.15/17.93]? UKIDSS Ks band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag[0.01/0.29]? Uncertainty in Ksmagmagstat.error;phot.mag;em.IR.KfloatnullableINS2Instrument used to obtain JHK photometry (2)meta.id;instrcharAv? The V band extinctionmagphys.absorption;em.opt.VfloatnullableSp?[N/Y] Observed with spectroscopy? (N=No)meta.codecharIR?[N/Y/?] Shows IR excess emission? (?=Unknown)meta.codecharX?[N/Y] Has X-ray emission? (Y=Yes)meta.codecharPapICross-match within 1" with Paper Imeta.ref.urlintnullableW1mag[3.66/18.11]? WISE 3.4 micron band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_W1mag[0.02/0.45]? Uncertainty in W1magmagstat.error;phot.magfloatnullableW2mag? WISE 4.6 micron band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag? Uncertainty in W2magmagstat.error;phot.magfloatnullableW3mag? WISE 12 micron band magnitudemagphot.flux.density;em.IR.8-15umfloatnullableW4mag[-2.49/9.18]? WISE 22 micron band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_W4mag[0.01/0.54]? Uncertainty in W4magmagstat.error;phot.magfloatnullable[3.6][5.43/18.46]? Spitzer/IRAC 3.6um band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6][0.06/0.5]? Uncertainty in [3.6]magstat.errorfloatnullable[4.5]? Spitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? Uncertainty in [4.5]magstat.errorfloatnullable[5.8]? Spitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? Uncertainty in [5.8]magstat.errorfloatnullable[8.0][2.73/14.25]? Spitzer/IRAC 8.0um band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0][0.06/0.65]? Uncertainty in [8.0]magstat.errorfloatnullable[24][-2.13/9.96]? Spitzer/MIPS 24um band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_[24][0.06/0.34]? Uncertainty in [24]magstat.errorfloatnullablea2-8[-2.87/4.39]? Spectral slope 2/8um (3)spect.indexfloatnullablea2-24[-3.16/2.02]? Spectral slope 2/24um (3)spect.indexfloatnullablea3.6-8[-3.36/3.35]? Spectral slope 3.6/8um (3)spect.indexfloatnullablea3.6-24[-3.31/2.83]? Spectral slope 3.6/24um (3)spect.indexfloatnullableClassClassification: DD(=debris disk candidate), Flat, I, II, III, TD(=Transition Disk), or TD?src.classcharJ/ApJS/207/5/table6Accretion properties of the YSOs in L1641 from HectochellerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/1211] Running sequence numbermeta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainEWLi[0.18/0.8]? Li I equivalent width in {AA}0.1nmspect.line.eqWidth;em.opt.IfloatnullableEWHa[-228.7/0.4]? H{alpha} equivalent width; in units of Angstroms0.1nmspect.line.eqWidth;em.line.HalphafloatnullableFWHa.1[27/612]? H{alpha} full width at 10% peak intensitykm/sspect.line.widthintnullableTTS[C/W] T Tauri type (C=classical or W=weak)src.classcharProb[0/100]? Accretor probability%statintnullablel_logMacLimit flag on logMacmeta.code.errorcharlogMac[-12.2/-7]? Log of mass accretion ratelog(solMass.yr**-1)phys.mass.lossfloatnullableDateDate of the observationtime.epochnullableJ/ApJS/207/5/propStellar and disk properties, masses and ages of the YSOs, in L1641Age1[0/66]? Age from D08 (1)Myrtime.agefloatnullableDiskDisk type (1)src.classcharl_logMHbLimit flag on logMHbmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/1388] Running sequence numbermeta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainSpTMK spectral typesrc.spTypecharL[0.005/448.72] LuminositysolLumphys.luminosity;em.radiofloatAv[0/9.8] The V band extinctionmagphys.absorption;em.opt.VfloatEWHa[-407/2.6]? H{alpha} equivalent width in {AA}0.1nmspect.line.eqWidth;em.line.HalphafloatnullableEWHb[-87/69]? H{beta} equivalent width in {AA}0.1nmspect.line.eqWidth;em.line.Hbetafloatnullablel_logMHaLimit flag on logMHameta.code.errorcharlogMHa[-12/-5]? Log mass accretion rate from H{alpha}log(solMass.yr**-1)phys.mass.lossfloatnullablelogMHb? Log mass accretion rate from H{beta}log(solMass.yr**-1)phys.mass.lossfloatnullableTTS[C/W] T Tauri star type (C=Classical, or W=Weak)src.classcharM1[0.1/4.5]? Mass from D08 (1)solMassphys.massfloatnullablee_M1[0/0.83]? Lower limit uncertainty in M1solMassstat.errorfloatnullableE_M1[0/0.63]? Upper limit uncertainty in M1solMassstat.error;stat.maxfloatnullablee_Age1[0/49.6]? Lower limit uncertainty in Age1Myrstat.errorfloatnullableE_Age1[0/36.9]? Upper limit uncertainty in Age1Myrstat.error;stat.maxfloatnullableM2[0.1/3.7]? Mass from S00 (1)solMassphys.massfloatnullablee_M2? Lower limit uncertainty in M2solMassstat.errorfloatnullableE_M2? Upper limit uncertainty in M2solMassstat.error;stat.maxfloatnullableAge2[0.1/72]? Age from S00 (1)Myrtime.agefloatnullablee_Age2? Lower limit uncertainty in Age2Myrstat.errorfloatnullableE_Age2? Upper limit uncertainty in Age2Myrstat.error;stat.maxfloatnullableM3[0.05/1.4]? Mass from B98 (1)solMassphys.massfloatnullablee_M3? Lower limit uncertainty in M3solMassstat.errorfloatnullableE_M3? Upper limit uncertainty in M3solMassstat.error;stat.maxfloatnullableAge3[1/43.1]? Age from B98 (1)Myrtime.agefloatnullablee_Age3? Lower limit uncertainty in Age3Myrstat.errorfloatnullableE_Age3? Upper limit uncertainty in Age3Myrstat.error;stat.maxfloatnullableM4[0.06/2.9]? Mass from DM97 (1)solMassphys.massfloatnullablee_M4? Lower limit uncertainty in M4solMassstat.errorfloatnullableE_M4? Upper limit uncertainty in M4solMassstat.error;stat.maxfloatnullableAge4[0/74.8]? Age from DM97 (1)Myrtime.agefloatnullablee_Age4? Lower limit uncertainty in Age4Myrstat.errorfloatnullableE_Age4? Upper limit uncertainty in Age4Myrstat.error;stat.maxfloatnullableM5[0.2/4.7]? Mass from Pisa11 (1)solMassphys.massfloatnullablee_M5? Lower limit uncertainty in M5solMassstat.errorfloatnullableE_M5? Upper limit uncertainty in M5solMassstat.error;stat.maxfloatnullableAge5[0.2/56.1]? Age from Pisa11 (1)Myrtime.agefloatnullablee_Age5? Lower limit uncertainty in Age5Myrstat.errorfloatnullableE_Age5? Upper limit uncertainty in Age5Myrstat.error;stat.maxfloatnullable