J/AJ/150/118ivo://CDS.VizieR/J/AJ/150/118doi:10.26093/cds/vizier.51500118CDSPoppenhaeger K.Cody A.M.Covey K.R.Gunther H.M.Hillenbrand L.A.,Plavchan P.Rebull L.M.Stauffer J.R.Wolk S.J.Espaillat C.,Forbrich J.Gutermuth R.A.Hora J.L.Morales-Calderon M.Song I.2017-11-28T13:21:41Z2015-10-30T15:14:59ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsvariable-starsinfrared-photometryWe present a time-variability study of young stellar objects (YSOs) in the cluster IRAS 20050+2720, performed at 3.6 and 4.5{mu}m with the Spitzer Space Telescope; this study is part of the Young Stellar Object VARiability (YSOVAR) project. We have collected light curves for 181 cluster members over 60 days. We find a high variability fraction among embedded cluster members of ca. 70%, whereas young stars without a detectable disk display variability less often (in ca. 50% of the cases) and with lower amplitudes. We detect periodic variability for 33 sources with periods primarily in the range of 2-6 days. Practically all embedded periodic sources display additional variability on top of their periodicity. Furthermore, we analyze the slopes of the tracks that our sources span in the color-magnitude diagram (CMD). We find that sources with long variability time scales tend to display CMD slopes that are at least partially influenced by accretion processes, while sources with short variability timescales tend to display extinction-dominated slopes. We find a tentative trend of X-ray detected cluster members to vary on longer timescales than the X-ray undetected members.2015AJ....150..118Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/150/118CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/148/122 : YSOVAR: infrared photometry in Lynds 1688 (Gunther+, 2014)J/AJ/144/101 : Multiwavelength data of IRAS 20050+2720 (Guenther+, 2012)J/ApJ/753/149 : YSOVAR: 6 eclipsing binaries in Orion (Morales-Calderon+, 2012)J/ApJ/733/50 : MIR photometric monitoring of the ONC (Morales-Calderon+, 2011)J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)J/A+A/481/93 : CO and HC3N maps of IRAS 20050+2720 (Beltran+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/150/118https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/150/118http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/150/118https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/150/118https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/150/118http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/150/118GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/150/118/table2 (Source designations, flux densities, and light curve properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/150/118/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/150/118/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/150/118/table2?GETtext/xml+votable180.050000true301.7534891727.495349170.0055555555555555566/130506.772611666688002e-21 6.118840631666147e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/150/118?format=asciiInfrareddefaultJ/AJ/150/118/table2Source designations, flux densities, and light curve propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainSSTYSVIAU designation within the Spitzer Space Telescope (SST) Young Stellar Object VARiability (YSOVAR) program (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharSIMBADMain Simbad identifier for an objectmeta.idcharClInfrared class according to SED slope (F, I, II, or III) (1)meta.code.class;em.IRcharStdSource in YSOVAR standard set? (False or True) (2)meta.codecharMmIs source cluster member without light curve? (False or True)meta.code.membercharN3.6[0/102] Number of Spitzer/IRAC 3.6{mu}m band datapointsmeta.number;em.IR.3-4umintN4.5[0/101] Number of Spitzer/IRAC 4.5{mu}m band datapointsmeta.number;em.IR.4-8umintmed3.6[6.7/16.2]? Median Spitzer/IRAC 3.6{mu}m band magnitudemagstat.median;phot.mag;em.IR.3-4umfloatnullablemed4.5[6.3/16]? Median Spitzer/IRAC 4.5{mu}m band magnitudemagstat.median;phot.mag;em.IR.4-8umfloatnullable<[3.6]>[6.7/16.2]? Mean Spitzer/IRAC 3.6{mu}m band magnitudemagphot.mag;em.IR.3-4umfloatnullables_<[3.6]>[0/0.56]? Width of Spitzer/IRAC 3.6{mu}m band distribution (3)maginstr.bandwidth;obs;em.IR.3-4umfloatnullable<[4.5]>[6.3/16]? Mean Spitzer/IRAC 4.5{mu}m band magnitudemagphot.mag;em.IR.4-8umfloatnullables_<[4.5]>[0/0.53]? Width of Spitzer/IRAC 4.5{mu}m band distribution (3)maginstr.bandwidth;obs;em.IR.4-8umfloatnullablem3.6[6.6/16.1]? Minimum Spitzer/IRAC 3.6{mu}m band magnitudemagstat.min;phot.mag;em.IR.3-4umfloatnullablem4.5[5.7/15.9]? Minimum Spitzer/IRAC 4.5{mu}m band magnitudemagstat.min;phot.mag;em.IR.4-8umfloatnullableM3.6[6.7/16.2]? Maximum Spitzer/IRAC 3.6{mu}m band magnitudemagstat.max;phot.mag;em.IR.3-4umfloatnullableM4.5[5.7/16.2]? Maximum Spitzer/IRAC 4.5{mu}m band magnitudemagstat.max;phot.mag;em.IR.4-8umfloatnullableVar[0/1] Variability caused by light curve artifacts? (0=yes, 1=no)meta.codefloatStet[-1.4/16.7]? Stetson index for a two-band light curvemeta.code;spect.indexfloatnullablechiM3.6[0.13/291]? Reduced {chi}^2^ to mean for Spitzer/IRAC 3.6{mu}m bandstat.fit.chi2;stat.mean;em.IR.3-4umfloatnullablechiM4.5[0.4/655]? Reduced {chi}^2^ to mean for Spitzer/IRAC 4.5{mu}m bandstat.fit.chi2;stat.mean;em.IR.4-8umfloatnullablePer[0.28/14.2]? Adopted period of light curvedtime.perioddoublenullableFAP[0/0.03]? False Alarm Probability of adopted periodstat.probability;time.perioddoublenullablet3.6[0.2/15.8]? Spitzer/IRAC 3.6{mu}m band decay time of autocorrelation functiondstat.correlation;em.IR.3-4umfloatnullablet4.5[0.3/15.7]? Spitzer/IRAC 4.5{mu}m band decay time of autocorrelation functiondstat.correlation;em.IR.3-4umfloatnullableCMD[8/159]? Fitted CMD slope angledegarith.grad;pos.posAng;meta.modelledfloatnullablee_CMD[0.4/90]? The 1{sigma} error in CMDdegstat.error;arith.grad;pos.posAngfloatnullablechiP3.6[0.3/224]? Residual scatter in Spitzer/IRAC 3.6{mu}m band phase-folded fitted light curvesstat.error;time.phase;em.IR.3-4umfloatnullablechiP4.5[0.4/534]? Residual scatter in Spitzer/IRAC 4.5{mu}m band phase-folded fitted light curvesstat.error;time.phase;em.IR.4-8umfloatnullableJmag1[10.76/19.71]? Median PAIRITEL J band magnitudemagphot.mag;em.IR.JfloatnullableHmag1[10/17.2]? Median PAIRITEL H band magnitudemagphot.mag;em.IR.HfloatnullableKmag1[9/16.4]? Median PAIRITEL Ks band magnitudemagphot.mag;em.IR.KfloatnullableUmag[11/16.1]? FLWO/KeplerCam U band magnitude (4)magphot.mag;em.opt.Ufloatnullablee_Umag[0.1/0.11]? Statistical error in Umagmagstat.error;phot.mag;em.opt.UfloatnullableBmag[11/16]? FLWO/KeplerCam B band magnitude (4)magphot.mag;em.opt.Bfloatnullablee_Bmag[0.1/0.101]? Statistical error in Bmagmagstat.error;phot.mag;em.opt.BfloatnullableVmag[10.6/14.3]? FLWO/KeplerCam V band magnitude (4)magphot.mag;em.opt.Vfloatnullablee_Vmag[0.1/0.1002]? Statistical error in Vmagmagstat.error;phot.mag;em.opt.VfloatnullableRmag[10.3/18.7]? FLWO/KeplerCam R band magnitude (4)magphot.mag;em.opt.Rfloatnullablee_Rmag[0.1/0.12]? Statistical error in Rmagmagstat.error;phot.mag;em.opt.RfloatnullableImag[10/17]? FLWO/KeplerCam I band magnitude (4)magphot.mag;em.opt.Ifloatnullablee_Imag[0.1/0.103]? Statistical error in Imagmagstat.error;phot.mag;em.opt.IfloatnullableJmag2[9.7/17]? 2MASS J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag2[0.02/0.2]? Statistical error in Jmag2magstat.error;phot.mag;em.IR.JfloatnullableHmag2[9.5/16.1]? 2MASS H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag2[0.02/0.2]? Statistical error in Hmag2magstat.error;phot.mag;em.IR.HfloatnullableKmag2[8.7/15.3]? 2MASS Ks band magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag2[0.01/0.2]? Statistical error in Kmag2magstat.error;phot.mag;em.IR.Kfloatnullable[3.6][6.7/17]? Cryogenic Spitzer/IRAC 3.6{mu}m band magnitudemagphot.mag;em.IR.3-4umdoublenullablee_[3.6][0.002/0.15]? Statistical error in [3.6]magstat.error;phot.mag;em.IR.3-4umfloatnullable[4.5][5.8/16.3]? Cryogenic Spitzer/IRAC 4.5{mu}m band magnitudemagphot.mag;em.IR.4-8umdoublenullablee_[4.5][0.002/0.14]? Statistical error in [4.5]magstat.error;phot.mag;em.IR.4-8umfloatnullable[5.8][4.9/14.5]? Cryogenic Spitzer/IRAC 5.8{mu}m band magnitudemagphot.flux.density;em.IR.4-8umdoublenullablee_[5.8][0.001/0.29]? Statistical error in [5.8]magstat.error;phot.flux.density;em.IR.4-8umfloatnullable[8.0][3.7/13.8]? Cryogenic Spitzer/IRAC 8.0{mu}m band magnitudemagphot.flux.density;em.IR.8-15umdoublenullablee_[8.0][0.001/0.44]? Statistical error in [8.0]magstat.error;phot.flux.density;em.IR.8-15umfloatnullable[24][0/9.8]? Cryogenic Spitzer/MIPS 24{mu}m band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_[24][0/0.7]? Statistical error in [24]magstat.error;phot.flux.density;em.IR.15-30umfloatnullableFX[1.9/274.4]? X-ray flux count rate (in 10^-7^ct/s/cm^2^) (4)count.ks**-1.m**-2phot.flux;em.X-rayfloatnullableSpitzerNumber of sources in the Spitzer survey of young stellar clusters from Gutermuth et al. 2009 (cat. J/ApJS/184/18) within 5''meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar