J/AJ/155/196ivo://CDS.VizieR/J/AJ/155/196doi:10.26093/cds/vizier.51550196CDSRebull L.M.Stauffer J.R.Cody A.M.Hillenbrand L.A.David T.J.,Pinsonneault M.2019-12-03T07:58:53Z2018-12-12T13:23:34ZCDS support team

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

cds-question@unistra.frstellar-associationspre-main-sequence-starsphotometryvisible-astronomyinfrared-photometryWe present an analysis of K2 light curves (LCs) for candidate members of the young Upper Sco (USco) association (~8 Myr) and the neighboring {rho} Oph embedded cluster (~1 Myr). We establish ~1300 stars as probable members, ~80% of which are periodic. The phased LCs have a variety of shapes which can be attributed to physical causes ranging from stellar pulsation and stellar rotation to disk-related phenomena. We identify and discuss a number of observed behaviors. The periods are ~0.2-30 days with a peak near 2 days and the rapid period end nearing breakup velocity. M stars in the young USco region rotate systematically faster than GK stars, a pattern also present in K2 data for the older Pleiades and Praesepe systems. At higher masses (types FGK), the well-defined period-color relationship for slowly rotating stars seen in the Pleiades and Praesepe systems is not yet present in USco. Circumstellar disks are present predominantly among the more slowly rotating M stars in USco, with few disks in the subday rotators. However, M dwarfs with disks rotate faster on average than FGK systems with disks. For four of these disked M dwarfs, we provide direct evidence for disk locking based on the K2 LC morphologies. Our preliminary analysis shows a relatively mass-independent spin-up by a factor of ~3.5 between USco and the Pleiades, then mass-dependent spin-down between Pleiades and Praesepe.2018AJ....155..196Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/155/196CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/240 : The DENIS database first release (Epchtein+, 1999)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)I/337 : Gaia DR1 (Gaia Collaboration, 2016)II/336 : AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)J/AJ/120/479 : Low-mass stars in the Upper Sco association (Ardila+, 2000)J/AJ/121/1040 : PMS members of upper Scorpius OB associationJ/AJ/124/404 : Upper Scorpius OB association Lithium survey. II.J/ApJ/630/381 : Mid-IR imaging in {rho} Oph (Barsony+, 2005)J/AJ/131/3016 : Low-mass objects in Upper Scorpius (Slesnick+, 2006)J/ApJ/651/L49 : Upper Sco OB association IRAC observationsJ/ApJ/688/377 : Low-mass objects in Upper Scorpius. II. (Slesnick+, 2008)J/ApJ/705/1646 : Debris disks in Upper Sco (Carpenter+, 2009)J/A+A/527/A24 : Spectra of low-mass stars in Upper Sco (Lodieu+, 2011)J/AJ/142/140 : Optical spectroscopy of {rho} Oph stars. II.J/ApJ/758/31 : IR photometry for members of Upper Sco (Luhman+, 2012)J/MNRAS/448/2737 : New PMS K/M Stars in Upper Scorpius (Rizzuto+, 2015)J/AJ/152/113 : Pleiades members with K2 light curves. I. PeriodsJ/AJ/152/114 : Pleiades members with K2 light curves. II. (Rebull+, 2016)J/AJ/152/115 : Pleiades members with K2 light curves. III.J/AJ/154/256 : VLM stars and BDs in Upper Sco using Gaia DR1 (Cook+, 2017)J/ApJ/839/92 : Praesepe members with K2 light curve data (Rebull+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/155/196https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/155/196http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/155/196https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/155/196https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/155/196http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/155/196GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/155/196/table1 (Periods and supporting data for USco and {rho} Oph members with K2 light curves)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/196/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/196/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/196/table1?GETtext/xml+votable180.050000true238.6637917-22.283750.005555555555555556Cone search capability for table J/AJ/155/196/table3 (Periods and supporting data for USco and {rho} Oph non-members with K2 light curves)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/196/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/196/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/196/table3?GETtext/xml+votable180.050000true238.6232083-20.34552780.0055555555555555564/1920 2686 2687 2772 5/7336 7337 7338 10715 10727 10733 10735 10736 10737 10738 10741 11077 11079 11092 11093 11094 11096 11097 11100 11101 6/29226 29312 29314 29327 29357 29358 29359 29360 29362 29363 29368 30736 30738 30744 30752 30753 30754 42859 42874 42877 42878 42879 42903 42905 42906 42907 42928 42929 42931 42937 42938 42939 42956 42958 42959 42960 42971 42974 42975 44304 44305 44307 44313 44341 44380 44381 44383 44393 44396 44409 44412 44413 444147.952274030004205e-20 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/155/196?format=asciiOpticalInfrareddefaultJ/AJ/155/196/table1Periods and supporting data for USco and {rho} Oph members with K2 light curvesRDist[yes no] Resolved distant periods? (8)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPIC[202499459/210282557] Ecliptic Plane Input Catalog identifiermeta.id;meta.mainlongRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainONameOther identifiermeta.idcharVmag[4.57/19.1]? Apparent V band Vega magnitudemagphot.mag;em.opt.VfloatnullableKsmag[2.24/16.75]? Apparent K_s_ band Vega magnitudemagphot.mag;em.IR.Kfloatnullable(V-Ks)o[-0.41/16.75]? Directly observed (V-K_s_) colormagphot.color;em.opt.V;em.IR.Kfloatnullable(V-Ks)u[-0.41/18.3]? The (V-K_s_) color used (1)magphot.color;em.opt.V;em.IR.KfloatnullableE(V-Ks)[0/36.36]? Adopted (V-K_s_) color excess (see Section 2.4)magphot.color.excessfloatnullableKsmag0[2.1/16.66]? Dereddened K_s_ band Vega magnitudemagphot.mag;em.IR.Kfloatnullable(V-Ks)0[-1.03/9.8]? Dereddened (V-K_s_) color (2)magphot.color;em.opt.V;em.IR.Kfloatnullablen_(V-Ks)[-9/6] Note on (V-K_s_) (3)meta.noteintn_(V-Ks)0[-9/3] Note on (V-K_s_)_0_ (4)meta.noteintPer1[0.0476/38.3933]? Primary period (taken to be the rotation period, see text)dtime.periodfloatnullablePer2[0.0458/23.9255]? Secondary perioddtime.periodfloatnullablePer3[0.045/12.9722]? Tertiary perioddtime.periodfloatnullablePer4[0.0452/18.3921]? Quaternary perioddtime.periodfloatnullableMembMembership (not in Table 3) (5)meta.code.membercharDiskIR excess (disk) is present? (maybe, yes or no)meta.codecharDStartWavelength of start of IR excess (6)umem.wlcharDip[yes ] Light curve matches dipper characteristics? (not in Table 3) (7)meta.codecharBurst[yes ] Light curve matches burster characteristics? (not in Table 3) (7)meta.codecharMultiSingle or multi-period starmeta.codecharDD[yes no] Double-dip light curve? (8)meta.codecharDDmove[yes no] Moving double-dip light curve? (8)meta.codecharShch[yes no] Shape changer? (8)meta.codecharBeat[yes no] Full light curve has beating visible? (8)meta.codecharCPeak[yes no] Complex peak? (8) (9)meta.codecharRClose[yes no] Resolved close periods? (8)meta.codecharPulse[yes no] Pulsator? (8)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/AJ/155/196/table3Periods and supporting data for USco and {rho} Oph non-members with K2 light curvesShch[yes no] Shape changer? (8)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPIC[202499459/210282557] Ecliptic Plane Input Catalog identifiermeta.id;meta.mainlongRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainONameOther identifiermeta.idcharVmag[4.57/19.1]? Apparent V band Vega magnitudemagphot.mag;em.opt.VfloatnullableKsmag[2.24/16.75]? Apparent K_s_ band Vega magnitudemagphot.mag;em.IR.Kfloatnullable(V-Ks)o[-0.41/16.75]? Directly observed (V-K_s_) colormagphot.color;em.opt.V;em.IR.Kfloatnullable(V-Ks)u[-0.41/18.3]? The (V-K_s_) color used (1)magphot.color;em.opt.V;em.IR.KfloatnullableE(V-Ks)[0/36.36]? Adopted (V-K_s_) color excess (see Section 2.4)magphot.color.excessfloatnullableKsmag0[2.1/16.66]? Dereddened K_s_ band Vega magnitudemagphot.mag;em.IR.Kfloatnullable(V-Ks)0[-1.03/9.8]? Dereddened (V-K_s_) color (2)magphot.color;em.opt.V;em.IR.Kfloatnullablen_(V-Ks)[-9/6] Note on (V-K_s_) (3)meta.noteintn_(V-Ks)0[-9/3] Note on (V-K_s_)_0_ (4)meta.noteintPer1[0.0476/38.3933]? Primary period (taken to be the rotation period, see text)dtime.periodfloatnullablePer2[0.0458/23.9255]? Secondary perioddtime.periodfloatnullablePer3[0.045/12.9722]? Tertiary perioddtime.periodfloatnullablePer4[0.0452/18.3921]? Quaternary perioddtime.periodfloatnullableDiskIR excess (disk) is present? (maybe, yes or no)meta.codecharDStartWavelength of start of IR excess (6)umem.wlcharMultiSingle or multi-period starmeta.codecharDD[yes no] Double-dip light curve? (8)meta.codecharDDmove[yes no] Moving double-dip light curve? (8)meta.codecharBeat[yes no] Full light curve has beating visible? (8)meta.codecharCPeak[yes no] Complex peak? (8) (9)meta.codecharRClose[yes no] Resolved close periods? (8)meta.codecharRDist[yes no] Resolved distant periods? (8)meta.codecharPulse[yes no] Pulsator? (8)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlchar