J/ApJ/842/83ivo://CDS.VizieR/J/ApJ/842/83doi:10.26093/cds/vizier.18420083CDSDouglas S.T.Agueros M.A.Covey K.R.Kraus A.2018-05-14T09:13:25Z2018-03-06T11:28:38ZCDS support team

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

cds-question@unistra.fropen-star-clusterslate-type-starsvisible-astronomysloan-photometrymultiple-starsinfrared-photometryWe analyze K2 light curves for 794 low-mass (1>~M_*_>~0.1M_{sun}_) members of the ~650Myr old open cluster Praesepe and measure rotation periods (P_rot_) for 677 of these stars. We find that half of the rapidly rotating >~0.3M_{sun}_ stars are confirmed or candidate binary systems. The remaining >~0.3M_{sun}_ fast rotators have not been searched for companions, and are therefore not confirmed single stars. We previously found that nearly all rapidly rotating 0.3M_{sun}_ stars in the Hyades are binaries, but we require deeper binary searches in Praesepe to confirm whether binaries in these two co-eval clusters have different P_rot_ distributions. We also compare the observed P_rot_ distribution in Praesepe to that predicted by models of angular-momentum evolution. We do not observe the clear bimodal P_rot_ distribution predicted by Brown (2014ApJ...789..101B) for >0.5M_{sun}_ stars at the age of Praesepe, but 0.25-0.5M_{sun}_ stars do show stronger bimodality. In addition, we find that >60% of early M dwarfs in Praesepe rotate more slowly than predicted at 650Myr by Matt+ (2015ApJ...799L..23M), which suggests an increase in braking efficiency for these stars relative to solar-type stars and fully convective stars. The incompleteness of surveys for binaries in open clusters likely impacts our comparison with these models since the models only attempt to describe the evolution of isolated single stars.2017ApJ...842...83Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/842/83CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/sb9 : SB9: 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-)IV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)J/ApJ/521/682 : Binaries in the Praesepe and Coma clusters (Abt+, 1999)J/A+A/375/989 : JHK photometry of Praesepe low-mass stars (Bouvier+, 2001)J/AJ/123/1570 : alpha Persei and Praesepe Clusters (Patience+, 2002)J/AJ/124/1570 : JHKs photometry in Praesepe (Adams+, 2002)J/AJ/134/2340 : Praesepe & Coma Berenices cluster membership (Kraus+, 2007)J/AJ/135/907 : Variables in Praesepe identified with KELT (Pepper+, 2008)J/A+A/498/949 : Velocities of F-K dwarfs in open clusters (Mermilliod+, 2009)J/AJ/141/166 : HATNet variability survey of K and M dwarfs (Hartman+, 2011)J/MNRAS/413/2218 : Stellar rotation in Hyades and Praesepe (Delorme+, 2011)J/ApJ/756/L33 : RVs of 2 hot Jupiters in Praesepe (Quinn+, 2012)J/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 2013)J/MNRAS/442/2081 : Praesepe members light curves (Kovacs+, 2014)J/ApJ/795/161 : Activity & rotation in Praesepe & the Hyades (Douglas+, 2014)J/A+A/588/A118 : Pr0211 RVs, photom. and activity indexes (Malavolta+, 2016)J/ApJ/822/47 : K2 rotation periods for 65 Hyades members (Douglas+, 2016)J/A+A/594/A100 : K2 new planetary and EB candidates (Barros+, 2016)J/AJ/152/113 : Pleiades members with K2 LCs. I. Periods (Rebull+, 2016)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/ApJ/842/83https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/842/83http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/842/83https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/842/83https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/842/83http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/842/83GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/842/83/table3 (Prot measurements for Praesepe stars targeted in K2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/842/83/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/842/83/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/842/83/table3?GETtext/xml+votable180.050000true130.1578511118.700121110.005555555555555556Cone search capability for table J/ApJ/842/83/table1 (Praesepe members with discrepant Prot measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/842/83/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/842/83/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/842/83/table1?GETtext/xml+votable180.050000true132.361512518.52210830.005555555555555556Cone search capability for table J/ApJ/842/83/table2 (Companions to Praesepe members with measured Prot)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/842/83/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/842/83/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/842/83/table2?GETtext/xml+votable180.050000true125.509083319.99978610.0055555555555555565/1169 1171 1173 1174 1175 1177 1180 1181 6/4335 4346 4347 4351 4673 4674 4675 4680 4682 4683 4689 4690 4691 4704 4705 4707 4713 4715 4716 4717 4728 4729 4730 4732 4733 4734 4816 4817 4823 4872 4873 4874 4896 48987.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/842/83?format=asciiOpticalInfrareddefaultJ/ApJ/842/83/table3Prot measurements for Praesepe stars targeted in K2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameLiterature name if any (G1)meta.id;meta.maincharEPICEPIC identifiermeta.idlongMass[0.1/1.5] Mass from Paper II, Table 5 (2014, J/ApJ/795/161)solMassphys.massfloatr'mag[9.1/23.6] r' mag from Paper II, Table 5 (2014, J/ApJ/795/161)magphot.mag;em.opt.RfloatKmag[8.4/15.4] K band mag from Paper II, Table 5 (2014, J/ApJ/795/161)magphot.mag;em.IR.KfloatProt1[0.1/38.1]? Rotational Period, first periodogram peakdtime.period;stat.maxfloatnullablePw1[0.007/1]? Power, first periodogram peakstat.fit.paramfloatnullableQ1[0/3]? Q flag, first periodogram peak (0=confirmed detection) (1)meta.code.qualintnullableClean?[YN ] There are no peaks >60% of the primary peak's powermeta.codecharSig[0.005/0.02]? Minimum significance thresholds for the periodogram peaksmeta.notedoublenullableProt2[0.1/27.1]? Rotational Period, second periodogram peakdtime.period;stat.maxfloatnullablePw2[0.009/0.4]? Power, second periodogram peakstat.fit.paramfloatnullableQ2[0/1]? Q flag, second periodogram peak (0=confirmed detection) (1)meta.code.qualintnullableMP?[YMN ] Multiple rotational periods? (M:maybe)meta.codecharSE?[YMN ] Spot evolution? Y:yes, M:maybe, N:nometa.codecharBl?[YMN ] Blend? Y:yes, M:maybe, N:nometa.codecharBin?Binary status: conf=confirmed; cand=candidatemeta.codecharRawAmp[0.0009/0.3]? Photometric amplitude of variability (2)magsrc.var.amplitudedoublenullableSmAmp[0.005/11]? Smoothed amplitude of variability (3)%src.var.amplitudedoublenullablePPeriod selected as the final period to plot (4)meta.notecharProtA[0.5/36]? PTF Rotational Period from Agueros+ (2011ApJ...740..110A)dtime.periodfloatnullableProtD[2.4/14.6]? SWASP Rotational Period from Delorme+ (2011, J/MNRAS/413/2218)dtime.periodfloatnullableProtS[0.2/6]? Rotational Period from Scholz+ (2007MNRAS.381.1638S, 2011MNRAS.413.2595S)dtime.periodfloatnullableProtK[2.5/18.2]? Rotational Period from Kovacs+ (2014, J/MNRAS/442/2081)dtime.periodfloatnullableKpmag[9.4/19.2] Kepler magnitudemagphot.mag;em.optfloatNotesNotes on sourcesmeta.notecharPrCatDisplay data from Kovacs+, 2014, J/MNRAS/442/2081 and Delorme+, 2011, J/MNRAS/413/2218, within 3"meta.ref.urlintnullablePCatData from Kraus and Hillenbrand (2007, J/AJ/134/2340) and Adams+ (2002, J/AJ/124/1570) within 3"meta.ref.urlintnullableAllDisplay all data for this source in this catalog (tables 1-3)meta.ref.urlchar2MDisplay the 2MASS data (Cutri+ 2003, II/246, within 1")meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from the K2 EPIC catalog (IV/34) (right ascension part)degpos.eq.ra;meta.main_DEPositions from the K2 EPIC catalog (IV/34) (declination part)degpos.eq.dec;meta.mainJ/ApJ/842/83/table1Praesepe members with discrepant Prot measurementsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameLiterature name if any (G1)meta.id;meta.maincharEPIC? EPIC identifiermeta.idlongnullableProtA[1.5/25.4]? PTF, rotational period, from Agueros+ (2011ApJ...740..110A) (1)dtime.periodfloatnullableProtD[2.4/10]? SWASP rotational period from Delorme+ (2011, J/MNRAS/413/2218) (1)dtime.periodfloatnullableProtS[0.2/6]? Rotational period from Scholz+ (2007MNRAS.381.1638S, 2011MNRAS.413.2595S) (1)dtime.periodfloatnullableProtK[5.8/19.2]? Rotational period from Kovacs+ (2014, J/MNRAS/442/2081) (1)dtime.periodfloatnullableProt[0.4/18.3]? K2 rotational period; this workdtime.periodfloatnullablePrCatDisplay data from Kovacs+, 2014, J/MNRAS/442/2081 and Delorme+, 2011, J/MNRAS/413/2218, within 3"meta.ref.urlintnullablePCatData from Kraus and Hillenbrand (2007, J/AJ/134/2340) and Adams+ (2002, J/AJ/124/1570) within 3"meta.ref.urlintnullableAllDisplay all data for this source in this catalog (tables 1-3)meta.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/ApJ/842/83/table2Companions to Praesepe members with measured ProtSimbadNameSimbad column added by the CDSmeta.idcharTripleTriple Typemeta.notecharRefsSource References (1)meta.ref;pos.framecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameLiterature name if any (G1)meta.id;meta.maincharEPIC? EPIC identifiermeta.idlongnullable2MASS2MASS Identifer (JHHMMSSss+DDMMSSs) if anymeta.idcharRAJ2000[8] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[16/25] Degree of Declination (J2000)pos.eq.dec;meta.mainEpoch[2000] Epoch of positiontime.epochintBinaryBinary Typemeta.notecharPCatData from Kraus and Hillenbrand (2007, J/AJ/134/2340) and Adams+ (2002, J/AJ/124/1570) within 3"meta.ref.urlintnullableAllDisplay all data for this source in this catalog (tables 1-3)meta.ref.urlchar