J/AJ/159/273ivo://CDS.VizieR/J/AJ/159/273doi:10.26093/cds/vizier.51590273CDSRebull L.M.Stauffer J.R.Cody A.M.Hillenbrand L.A.Bouvier J.,Roggero N.David T.J.2022-05-03T08:26:59Z2020-09-15T08:03:11ZCDS support team

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

cds-question@unistra.frmolecular-cloudsyoung-stellar-objectsvariable-starsinfrared-photometryvisible-astronomytwo-color-diagramsWe present an analysis of K2 light curves (LCs) from Campaigns 4 and 13 for members of the young (~3Myr) Taurus association, in addition to an older (~30Myr) population of stars that is largely in the foreground of the Taurus molecular clouds. Out of 156 of the highest-confidence Taurus members, we find that 81% are periodic. Our sample of young foreground stars is biased and incomplete, but nearly all stars (37/38) are periodic. The overall distribution of rotation rates as a function of color (a proxy for mass) is similar to that found in other clusters: the slowest rotators are among the early M spectral types, with faster rotation toward both earlier FGK and later M types. The relationship between period and color/mass exhibited by older clusters such as the Pleiades is already in place by Taurus age. The foreground population has very few stars but is consistent with the USco and Pleiades period distributions. As found in other young clusters, stars with disks rotate on average slower, and few with disks are found rotating faster than ~2days. The overall amplitude of the LCs decreases with age, and higher-mass stars have generally lower amplitudes than lower-mass stars. Stars with disks have on average larger amplitudes than stars without disks, though the physical mechanisms driving the variability and the resulting LC morphologies are also different between these two classes.2020AJ....159..273Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/159/273CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)IV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)I/345 : Gaia DR2 (Gaia Collaboration, 2018)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)II/336 : AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)J/ApJS/101/117 : UBVRIJHKLMNQ photometry in Taurus-Auriga (Kenyon+ 1995)J/A+A/312/439 : New T Tauri stars in Taurus-Auriga (Wichmann+, 1996)J/A+AS/125/229 : A standard stellar library (Lejeune+ 1997)J/A+A/349/619 : UBVRI light curves of AA Tau in 1995 (Bouvier+, 1999)J/AJ/117/354 : OB associations from Hipparcos (de Zeeuw+, 1999)J/A+A/409/169 : UBVRI light curves of AA Tau in 1999 (Bouvier+, 2003)J/AJ/131/3016 : Low-mass objects in Upper Scorpius (Slesnick+, 2006)J/A+A/463/1017 : B and V light curves of AA Tau (Bouvier+, 2007)J/A+A/468/353 : XMM-Newton Extended Survey of Taurus (Guedel+, 2007)J/ApJ/704/531 : The coevality of young binary systems (Kraus+, 2009)J/ApJS/186/259 : Taurus Spitzer survey: new candidate members (Rebull+, 2010)J/ApJS/196/4 : New young star candidates in Taurus-Auriga (Rebull+, 2011)J/A+A/557/A77 : VR light curves of AA Tau in 2007-2013 (Bouvier+, 2013)J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)J/AJ/147/82 : Monitoring of disk-bearing stars in NGC 2264 (Cody+, 2014)J/AJ/152/114 : Pleiades members with K2 light curves. II. (Rebull+, 2016)J/AJ/152/113 : Pleiades members with K2 light curves. I. (Rebull+, 2016)J/AJ/152/142 : Spitzer and WISE light curves of Neptune (Stauffer+, 2016)J/AJ/154/134 : Planetary-mass brown dwarfs in the Taurus SFR (Esplin+, 2017)J/ApJ/838/150 : The Taurus-Auriga ecosystem. I. (Kraus+, 2017)J/AJ/153/46 : Spectroscopy of candidate members in Taurus (Luhman+, 2017)J/AJ/153/257 : Comoving stars in Gaia DR1 (Oh+, 2017)J/ApJ/839/92 : Praesepe members with K2 light curve data (Rebull+, 2017)J/ApJ/848/97 : Young stellar variables with KELT for K2. I. (Rodriguez+,2017)J/AJ/156/71 : K2 Campaign2: young disk-bearing stars Sco & Oph (Cody+, 2018)J/AJ/156/271 : The stellar membership of the Taurus SFR (Luhman, 2018)J/AJ/155/196 : Analysis K2 LCs for members of USco & {rho}Oph (Rebull+ 2018)J/AJ/156/275 : Rotational evolut. of young, binary M dwarfs (Stauffer+, 2018)J/AJ/158/54 : New Taurus members, stellar to planetary masses (Esplin+,2019)J/A+A/630/A137 : Structure and kinematics of the Taurus region (Galli+, 2019)J/AJ/159/105 : 2 new stellar associations in vicinity of the Sun (Liu+, 2020)J/AJ/159/15 : Binary stars in Upper Scorpius (Tokovinin+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/159/273https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/159/273http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/159/273https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/159/273https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/159/273http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/159/273GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/159/273/table2 (Periods and supporting data for Taurus members with K2 light curves)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/159/273/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/159/273/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/159/273/table2?GETtext/xml+votable180.050000true60.843166717.27416670.005555555555555556Cone search capability for table J/AJ/159/273/tablea1 (Periods and supporting data for Taurus likely nonmembers with K2 light curves)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/159/273/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/159/273/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/159/273/tablea1?GETtext/xml+votable180.050000true52.147958322.78686110.0055555555555555564/1515 5/82 85 92 117 256-257 260 262-263 268 274 5871 5879 5884-5885 5887 6027 6042 6048-6050 6056 6059 6064 6072 6074 6/263 269 271 276 282 284 308 310-311 317-319 322-323 335 337 346-347 349 351-352 357-361 363 374-377 380 382-383 403 405-407 409 415 437 439 450-453 458 460 462 464 466-467 472-474 477-478 482 484 1032-1034 1036-1037 1039 1044-1045 1047 1058-1059 1061 1063-1066 1076-1077 1089 1094-1095 1100-1101 23422-23423 23481 23483 23507 23509-23511 23515 23522-23523 23529 23532 23534 23547 24103 24105 24107 24114-24115 24120-24122 24127 24204-24205 24210 24213 24216 24221 24223 24229-24232 24234-24235 24260 24264 24266 243007.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/159/273?format=asciiOpticalInfrareddefaultJ/AJ/159/273/table2Periods and supporting data for Taurus members with K2 light curvesGaiaGaia DR2 identifiermeta.idcharE(V-Ks)[0/14.3] Adopted (V-Ks) color excess (2)magphot.color;em.opt.V;em.IR.KfloatSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPIC[210509151/248180268] EPIC identifiermeta.id;meta.mainlongRAJ2000[04/05] Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[14/27] Degree of declination (J2000)pos.eq.dec;meta.mainONameOther target identifiermeta.idcharVmag[6.92/24.92]? Apparent V band Vega magnitudemagphot.mag;em.opt.VfloatnullableKsmag[5.32/15.44] Apparent Ks band Vega magnitudemagphot.mag;em.IR.Kfloat(V-Ks)o[0.08/11.58]? Observed (V-Ks) colormagphot.color;em.opt.V;em.IR.Kfloatnullable(V-Ks)u[0.08/15.74] Used (V-Ks) color (1)magphot.color;em.opt.V;em.IR.Kfloatf_E(V-Ks)Origin of E(V-Ks) leading to (V-Ks)0 (G2)phot.color;em.opt.V;em.IR.KintKsmag0[4.15/15.37] Inferred dereddended Ks Vega magnitude (2)magphot.mag;em.IR.Kfloat(V-Ks)0[-0.48/9.8] Inferred dereddended (V-Ks) color (3)magphot.color;em.opt.V;em.IR.Kfloatr_magReferences for magnitudes (G1)meta.refintP1[0.18/28]? Primary period (4)dtime.periodfloatnullableP2[0.05/16]? Secondary perioddtime.periodfloatnullableP3[0.31/12]? Tertiary perioddtime.periodfloatnullableP4[0.18/0.27]? Quaternary perioddtime.periodfloatnullableMemberMembership classification (5)src.classcharIRexcessPresence of an IR excessmeta.codecharIRexStrMinimum wavelength where IR excess is detected (6)umem.wl;stat.min;em.IRcharSlope[-2.89/1.94]? SED slope (7)spect.indexfloatnullableClassSED class; I, flat, II, or IIImeta.code.classchardipLC matches dipper characteristics (8)meta.codecharburstLC matches burster characteristics (8)meta.codecharmultSingle or multi-period star flagmeta.code.multipcharddLC and power spectrum matches double-dip characteristics (8)meta.codecharshapeLC matches shape changer characteristics (8)meta.codecharddmoveLC and power spectrum matche moving double-dip characteristics (8)meta.codecharbeatLC has beating visible (8)meta.codecharcomplexPower spectrum has a complex, structured peak and/or wide peak (8)meta.codecharclosepPower spectrum has resolved close peaks (8)meta.codechardistpPower spectrum has resolved distant peaks (8)meta.codecharpulsePower spectrum and LC match pulsator characteristics (8)meta.codecharJ/AJ/159/273/tablea1Periods and supporting data for Taurus likely nonmembers with K2 light curvesEPICEPIC identifiermeta.id;meta.mainlongE(V-Ks)[0/10.2] Adopted (V-Ks) color excess (2)magphot.color;em.opt.V;em.IR.KfloatSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[03/05] Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[12/28] Degreee of declination (J2000)pos.eq.dec;meta.mainONameOther target identifiermeta.idcharGaiaGaia DR2 identifiermeta.idcharVmag[4.82/22.5]? Apparent V band Vega magnitudemagphot.mag;em.opt.VfloatnullableKsmag[3.02/16.4] Apparent Ks band Vega magnitudemagphot.mag;em.IR.Kfloat(V-Ks)o[-0.29/8.71]? Observed (V-Ks) colormagphot.color;em.opt.V;em.IR.Kfloatnullable(V-Ks)u[-0.29/14.1] Used (V-Ks) color (1)magphot.color;em.opt.V;em.IR.Kfloatf_E(V-Ks)Origin of E(V-Ks) leading to (V-Ks)0 (G2)phot.color;em.opt.V;em.IR.KintKsmag0[2.6/16.4] Inferred dereddended Ks Vega magnitude (2)magphot.mag;em.IR.Kfloat(V-Ks)0[-0.87/13.7] Inferred dereddended (V-Ks) color (3)magphot.color;em.opt.V;em.IR.Kfloatr_magReferences for magnitudes (G1)meta.refintP1[0.04/25.4]? Primary period (4)dtime.periodfloatnullableP2[0.05/8.86]? Secondary perioddtime.periodfloatnullableP3[0.04/9.21]? Tertiary perioddtime.periodfloatnullableP4[0.05/2.39]? Quaternary perioddtime.periodfloatnullableIRexcessPresence of an IR excess; see parargaph 4meta.codecharIRexStrMinimum wavelength where IR excess is detected (5)umem.wl;stat.min;em.IRcharSlope[-4.04/1.06]? SED slope (6)spect.indexfloatnullableClassSED class; I, flat, II, or IIImeta.code.classcharmultSingle or multi-period star flagmeta.code.multipcharddLC and power spectrum matches double-dip characteristics (7)meta.codecharddmoveLC and power spectrum matche moving double-dip characteristics (7)meta.codecharshapeLC matches shape changer characteristics (7)meta.codecharbeatLC has beating visible (7)meta.codecharcomplexPower spectrum has a complex, structured peak and/or wide peak (7)meta.codecharclosepPower spectrum has resolved close peaks (7)meta.codechardistpPower spectrum has resolved distant peaks (7)meta.codecharpulsePower spectrum and LC match pulsator characteristics (7)meta.codechar