J/AJ/156/275ivo://CDS.VizieR/J/AJ/156/275doi:10.26093/cds/vizier.51560275CDSStauffer J.Rebull L.M.Cody A.M.Hillenbrand L.A.Pinsonneault M.,Barrado D.Bouvier J.David T.2020-04-01T06:35:45Z2019-05-09T07:09:19ZCDS support team

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

cds-question@unistra.fropen-star-clustersmultiple-starsdwarf-starsm-starspre-main-sequence-starsstellar-massesWe have analyzed K2 light curves for more than 3000 low-mass stars in the ~8 Myr old Upper Sco association, the ~125 Myr age Pleiades open cluster, and the ~700 Myr old Hyades and Praesepe open clusters to determine stellar rotation rates. Many of these K2 targets show two distinct periods, and for the lowest-mass stars in these clusters, virtually all of these systems with two periods are photometric binaries. The most likely explanation is that we are detecting the rotation periods for both components of these binaries. We explore the evolution of the rotation rate in both components of photometric binaries relative to one another and to nonphotometric binary stars. In Upper Sco and the Pleiades, these low-mass binary stars have periods that are much shorter on average and much closer to each other than would be true if drawn at random from the M dwarf single stars. In Upper Sco, this difference correlates strongly with the presence or absence of infrared excesses due to primordial circumstellar disks-the single-star population includes many stars with disks, and their rotation periods are distinctively longer on average than their binary star cousins of the same mass. By Praesepe age, the significance of the difference in rotation rate between the single and binary low-mass M dwarf stars is much less, suggesting that angular momentum loss from winds for fully convective zero-age main-sequence stars erases memory of the rotation rate dichotomy for binary and single very low mass stars at later ages.2018AJ....156..275Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/156/275CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)J/AJ/120/479 : Low-mass stars in the Upper Sco association (Ardila+, 2000)J/MNRAS/313/347 : Pleiades low-mass stars and brown dwarfs (Pinfield+, 2000)J/AJ/132/1517 : Spectroscopy of M dwarfs in Praesepe (Kafka+, 2006)J/MNRAS/408/2457 : Low-mass stars and brown dwarfs in Praesepe (Baker+, 2010)J/MNRAS/413/2218 : Stellar rotation in Hyades and Praesepe (Delorme+, 2011)J/ApJ/795/161 : Activity and rotation in Praesepe and the HyadesJ/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/ApJ/822/47 : K2 rotation periods for 65 Hyades members (Douglas+, 2016)J/ApJ/839/92 : Praesepe members with K2 light curve data (Rebull+, 2017)J/ApJ/842/83 : Praesepe members rotational periods from K2 LCsJ/AJ/155/196 : Analysis of K2 LCs for members of USco + {rho} Ophhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/156/275https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/156/275http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/156/275https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/156/275https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/156/275http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/156/275GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/156/275/table4 (Upper Sco M<0.32 M_{sun}_ stars with K2 periods)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/156/275/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/156/275/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/156/275/table4?GETtext/xml+votable180.050000true242.5642431-29.39895810.005555555555555556Cone search capability for table J/AJ/156/275/table5 (Pleiades M<0.32 M_{sun}_ stars with K2 periods)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/156/275/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/156/275/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/156/275/table5?GETtext/xml+votable180.050000true59.099685619.39825720.005555555555555556Cone search capability for table J/AJ/156/275/table6 (Praesepe/Hyades M<0.32 M_{sun}_ stars with K2 periods)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/156/275/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/156/275/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/156/275/table6?GETtext/xml+votable180.050000true65.233621914.85945690.0055555555555555564/28 5/116 118 120 1169 1172 1174 1175 1177 1180 1181 10746 10747 10750 11077 11089 11090 11091 11092 11094 6/335 339 340 341 349 355 357 358 363 365 366 370 375 377 378 380 381 382 468 470 471 476 478 484 485 496 1029 1031 1036 1042 1049 1050 1061 1065 4335 4344 4351 4637 4673 4675 4680 4681 4683 4684 4685 4687 4692 4693 4694 4704 4705 4707 4713 4716 4719 4728 4733 4734 4816 4817 4872 4874 4898 23508 23515 23526 23536 23539 23547 23549 23550 24106 24110 24123 24171 24194 24196 24200 24201 24202 24216 24224 24225 24232 24236 24241 24242 24251 24297 42906 42908 42909 42911 42929 42931 42932 42933 42934 42939 42941 42943 42944 42946 42950 42951 42952 42953 42955 42958 42977 42978 42979 42981 44305 44307 44316 44317 44319 44352 44353 44355 44380 44385 44387 44388 44389 44391 44393 44400 44401 44404https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/156/275?format=asciidefaultJ/AJ/156/275/table4Upper Sco M<0.32 M_{sun}_ stars with K2 periodsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPIC[202515599/247899959] EPIC identifiermeta.id;meta.mainlong(V-Ks)0[5.31/6.974] Intrinsic (V-K_s_) colormagphot.color;em.opt.V;em.IR.KfloatP1[0.0824/29.7371] First rotation perioddtime.periodfloatP2[0.1126/19.2487]? Second rotation perioddtime.periodfloatnullableMass[0.112/0.32] MasssolMassphys.massfloatDisk[Y] Disk detected? (only in Table 4)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from the K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017, Cat. IV/34) (right ascension part)degpos.eq.ra;meta.main_DEPosition from the K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017, Cat. IV/34) (declination part)degpos.eq.dec;meta.mainJ/AJ/156/275/table5Pleiades M<0.32 M_{sun}_ stars with K2 periodsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPIC[202515599/247899959] EPIC identifiermeta.id;meta.mainlong(V-Ks)0[5.31/6.974] Intrinsic (V-K_s_) colormagphot.color;em.opt.V;em.IR.KfloatP1[0.0824/29.7371] First rotation perioddtime.periodfloatP2[0.1126/19.2487]? Second rotation perioddtime.periodfloatnullableMass[0.112/0.32] MasssolMassphys.massfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/AJ/156/275/table6Praesepe/Hyades M<0.32 M_{sun}_ stars with K2 periodsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPIC[202515599/247899959] EPIC identifiermeta.id;meta.mainlong(V-Ks)0[5.31/6.974] Intrinsic (V-K_s_) colormagphot.color;em.opt.V;em.IR.KfloatP1[0.0824/29.7371] First rotation perioddtime.periodfloatP2[0.1126/19.2487]? Second rotation perioddtime.periodfloatnullableMass[0.112/0.32] MasssolMassphys.massfloatClusterCluster code (H=Hyades, Pr=Praesepe) (only in Table 6)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from the K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017, Cat. IV/34) (right ascension part)degpos.eq.ra;meta.main_DEPosition from the K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017, Cat. IV/34) (declination part)degpos.eq.dec;meta.main