J/ApJ/822/47ivo://CDS.VizieR/J/ApJ/822/47doi:10.26093/cds/vizier.18220047CDSDouglas S.T.Agueros M.A.Covey K.R.Cargile P.A.Barclay T.Cody A.,Howell S.B.Kopytova T.2018-10-08T11:27:44Z2016-08-30T09:46:22ZCDS support team

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

cds-question@unistra.frmultiple-starsstellar-massesopen-star-clustersAs the closest open cluster to the Sun, the Hyades is an important benchmark for many stellar properties, but its members are also scattered widely over the sky. Previous studies of stellar rotation in the Hyades relied on targeted observations of single stars or data from shallower all-sky variability surveys. The re-purposed Kepler mission, K2, is the first opportunity to measure rotation periods (P_rot_) for many Hyads simultaneously while also being sensitive to fully convective M dwarf members. We analyze K2 data for 65 Hyads and present P_rot_ values for 48. Thirty-seven of these are new measurements, including the first Prot measurements for fully convective Hyads. For 9 of the 11 stars with P_rot_ in the literature and this work, the measurements are consistent; we attribute the two discrepant cases to spot evolution. Nearly all stars with masses <~0.3M_{sun}_ are rapidly rotating, indicating a change in rotation properties at the boundary to full convection. When confirmed and candidate binaries are removed from the mass-period plane, only three rapid rotators with masses >~0.3M_{sun}_ remain. This is in contrast to previous results showing that the single-valued mass-period sequence for ~600Myr old stars ends at ~0.65M_{sun}_ when binaries are included. We also find that models of rotational evolution predict faster rotation than is actually observed at ~600Myr for stars <~0.9M_{sun}. The dearth of single rapid rotators more massive than ~0.3M_{sun}_ indicates that magnetic braking is more efficient than previously thought, and that age-rotation studies must account for multiplicity.2016ApJ...822...47Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/822/47CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/sb9 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)J/ApJS/224/2 : K2 EPIC stellar data for 138600 targets (Huber+, 2016)J/ApJ/821/93 : mid M dwarfs rotation + Galactic kinematics (Newton+, 2016)J/A+A/585/A7 : Hyades single stars fiducial photometry (Kopytova+, 2016)J/A+A/559/A43 : Pan-STARRS1 (PS1) obs. of the Hyades (Goldman+, 2013)J/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 2013)J/AJ/144/93 : Close white dwarf+M dwarf binaries (WD+dM) (Morgan+, 2012)J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)J/A+A/531/A92 : Deep all-sky census of the Hyades (Roeser+, 2011)J/MNRAS/413/2218 : Stellar rotation in Hyades and Praesepe (Delorme+, 2011)J/AJ/141/166 : HATNet variability survey of K & M dwarfs (Hartman+, 2011)J/A+A/498/949 : F-K dwarfs velocities in open clusters (Mermilliod+, 2009)J/MNRAS/384/1178 : 2MASS, SDSS & BVRI photometry for 825 stars (Bilir+, 2008)J/AJ/130/873 : BQS objects data in the SDSS DR3 area (Jester+, 2005)J/AJ/127/3579 : Radial velocities of Hyades stars (Paulson+, 2004)J/A+A/386/492 : Cat. of High Angular Resolution data (Richichi, 2002)J/A+A/354/881 : RVs of Praesepe + Hyades Am stars (Debernardi+ 2000)J/A+A/331/81 : Hyades membership (Perryman+ 1998)J/A+AS/124/75 : Multiple star catalogue (MSC) (Tokovinin 1997-1999)J/A+A/310/879 : Hyades binaries (Barrado+, 1996)J/ApJ/448/683 : Hyades RASS observations (Stern+ 1995)J/MNRAS/257/257 : Proper motions in the Hyades (Reid 1992)J/PASP/96/707 : Hyades lower main sequence (Duncan+, 1984)http://keplerscience.arc.nasa.gov/ : Kepler & K2 science center home pagehttp://www.sdss3.org/ : SDSS-III home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/822/47https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/822/47http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/822/47https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/822/47https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/822/47http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/822/47GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/822/47/table2 (Confirmed and candidate binary and planetary systems among the K2 targets and Hyads with measured P_rot_)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/822/47/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/822/47/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/822/47/table2?GETtext/xml+votable180.050000true50.63187528.974750.005555555555555556Cone search capability for table J/ApJ/822/47/table4 (Rotation periods measured from K2 data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/822/47/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/822/47/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/822/47/table4?GETtext/xml+votable180.050000true53.5437522.0725560.0055555555555555565/80 5883 5884 6/272 273 276 305 311 313 315 325 330 334 335 337 339 340 341 342 355 357 358 367 368 370 375 378 379 381 383 450 456 458 465 472 475 477 478 483 847 1045 1048 1052 1056 1058 1064 1065 23023 23408 23444 23479 23490 23492 23499 23505 23511 23515 23523 23525 23526 23527 23529 23531 23544 23545 23547 23548 23550 24114 24192 24201 24202 24203 24232 24242https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/822/47?format=asciidefaultJ/ApJ/822/47/table2Confirmed and candidate binary and planetary systems among the K2 targets and Hyads with measured P_rot_Cand?[NY] Candidate binary?meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[RSP2011]? Roser et al. 2011, J/A+A/531/A92, identifier (1)meta.idintnullableHIP? Hipparcos identifiermeta.id.crossintnullable2MASS2MASS identifier (HHMMSSss+DDMMSSs; J2000) if any (or -9999)meta.id.crosscharEPIC? EPIC identifiermeta.idlongnullableConf?[NY] Confirmed binary?meta.codecharPer[1.8/7022]? Orbital perioddtime.perioddoublenullableRefReference code(s) (2)meta.notecharIDIdentifier always filled (2MASS and then EPIC); column added by CDSmeta.id;meta.maincharK2pDisplay the K2 data for this star (table 4)meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from 2MASS names or from K2 EPIC catalog (Huber+, 2016, J/ApJS/224/2) (right ascension part)degpos.eq.ra;meta.main_DEPositions from 2MASS names or from K2 EPIC catalog (Huber+, 2016, J/ApJS/224/2) (declination part)degpos.eq.dec;meta.mainJ/ApJ/822/47/table4Rotation periods measured from K2 dataEPICEPIC identifiermeta.idlongNotesOther notesmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[RSP2011]? Roser et al. 2011, J/A+A/531/A92, identifiermeta.idintnullableHIP? Hipparcos identifiermeta.id.crossintnullableRAJ2000[3/4] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[12/26] Degree of Declination (J2000)pos.eq.dec;meta.main2MASS2MASS identifier (HHMMSSss+DDMMSSs; J2000) if anymeta.id.crosscharKpmag[8.7/16.7] Kepler apparent magnitudemagphot.mag;em.optfloatMass[0.1/1.2]? MasssolMassphys.massdoublenullableBin[0/2]? Binary status code (1)meta.codeintnullableAp[2/6.5] Aperture radius (2)pixphys.size.radiusfloatlcInitial light curve for analysis (3)meta.codecharIPer[0.15/39.6] Initial orbital perioddtime.periodfloatIPw[0.05/0.96] Initial periodogram powerstat.fit.paramfloatI99.9[0.008/0.03] Initial 99.9-percentile of maximum peakstat.fit.paramfloatCPer[0.2/70] Corrected orbital perioddtime.periodfloatCPw[0.18/0.98] Corrected periodogram powerstat.fit.paramfloatC99.9[0.008/0.05] Corrected 99.9-percentile of maximum peakstat.fit.paramfloatSPer[0.1/70] Secondary orbital perioddtime.periodfloatSPw[0.01/0.91] Secondary periodogram powerstat.fit.paramfloatS99.9[0.008/0.04] Secondary 99.9-percentile of maximum peakstat.fit.paramfloatQ[0/2] Quality flag (0=confident detection or 1=residual noise or confusion in the periodogram)meta.code.qualintSpE[MNY] Visible spot evolution over several cycles (M=Maybe, Y=Yes or N=No)meta.codecharmPer[MNY] Multiple periods in periodogrammeta.codecharuseLight curve selected for final analysis (4)meta.codecharK2Per[0.2/49.4]? K2 orbital perioddtime.perioddoublenullableK2Pw[0.09/0.98]? KS periodogram powerstat.fit.paramdoublenullableAmp[0.001/0.4] Amplitudesrc.var.amplitudedoubleNg[NY] Denotes presence of a visually-identified neighbor somewhere on chip (5)meta.codecharBl[MNY] A visually-identified neighbor is blended with the target on the chip (5)meta.codecharIDIdentifier always filled (2MASS and then EPIC); column added by CDSmeta.id;meta.maincharLitDisplay the literature data for this star (table 2)meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar