J/AJ/152/198ivo://CDS.VizieR/J/AJ/152/198doi:10.26093/cds/vizier.51520198CDSKarim M.T.Stassun K.G.Briceno C.Vivas A.K.Raetz S.Mateu C.,Downes J.J.Calvet N.Hernandez J.Neuhauser R.Mugrauer M.,Takahashi H.Tachihara K.Chini R.Cruz-Dias G.A.Aarnio A.,James D.J.Hackstein M.2018-09-10T06:38:21Z2017-02-21T14:26:48ZCDS support team

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

cds-question@unistra.frstellar-associationspre-main-sequence-starsMost existing studies of the angular momentum evolution of young stellar populations have focused on the youngest (<~1-3Myr) T Tauri stars. In contrast, the angular momentum distributions of older T Tauri stars (~4-10Myr) have been less studied, even though they hold key insights to understanding stellar angular momentum evolution at a time when protoplanetary disks have largely dissipated and when models therefore predict changes in the rotational evolution that can in principle be tested. We present a study of photometric variability among 1974 confirmed T Tauri members of various subregions of the Orion OB1 association, and with ages spanning 4-10Myr, using optical time series from three different surveys. For 564 of the stars (~32% of the weak-lined T Tauri stars and ~13% of the classical T Tauri stars in our sample) we detect statistically significant periodic variations, which we attribute to the stellar rotation periods, making this one of the largest samples of T Tauri star rotation periods yet published. We observe a clear change in the overall rotation period distributions over the age range 4-10Myr, with the progressively older subpopulations exhibiting systematically faster rotation. This result is consistent with angular momentum evolution model predictions of an important qualitative change in the stellar rotation periods starting at ~5Myr, an age range for which very few observational constraints were previously available.2016AJ....152..198Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/152/198CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/36 : UBV and uvby-beta obs. of Orion OB1 (Warren+ 1977)J/MNRAS/444/1793 : 25 Ori group low-mass stars (Downes+, 2014)J/MNRAS/427/3374 : QUEST RR Lyrae Survey III. (Mateu+, 2012)J/ApJ/671/1784 : Ori OB1 IRAC/MIPS observations (Hernandez+, 2007)J/ApJ/661/1119 : Spectroscopy in the 25 Ori group (Briceno+, 2007)J/AJ/129/907 : New Ori OB1 members (Briceno+, 2005)J/AJ/117/2941 : Rotation periods of Orion PMS stars (Stassun+, 1999)J/A+A/289/101 : Orion OB1 association. I. (Brown+, 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/152/198https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/152/198http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/152/198https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/152/198https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/152/198http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/152/198GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/152/198/table3 (Final periods and False Alarm Probabilities (FAPs) of all periodic stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/152/198/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/152/198/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/152/198/table3?GETtext/xml+votable180.050000true79.5487917-0.02658330.0055555555555555564/1430 5/5709 5715 5718 5724 5726 6/21486 22807 22812 22813 22823 22841 22844 22845 22848 22851 22852 22854 22857 22858 22859 22868 22869 22870 22902 22908 22933 22964 22976 22977 22980 22981 22983 22992 22993 22996 23562 23587https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/152/198?format=asciidefaultJ/AJ/152/198/table3Final periods and False Alarm Probabilities (FAPs) of all periodic starsFigure3I, R, and V-band phased light curvemeta.id;meta.filecharFigure4Wavelet transform plot (for stars whose periods were determined with the help of the Wavelet Analysis method)meta.id;meta.filecharPMult[0.1/29.62]? Multiband period (3)dtime.periodfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCVSO[4/1975] Running index number from the Centro de investigaciones de astronomia Variability Survey of Orion (CVSO)meta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainLocSource location in the Orion OB1 star-forming complex (1a, 1b, 25Ori, A cloud, B cloud, or HR1833) (1)meta.id.parentcharTypeSource type (CTTS, Ge, or WTTS) (2)src.classcharNI[0/183] Number of I-band observationsmeta.numberintIPer[0.18/29.57]? Period from I-band observations (3)dtime.periodfloatnullablel_IFAP[<] Upper limit flag on IFAPmeta.code.errorcharIFAP? False Alarm Probability from I-band observations (3)stat.fit.goodnessdoublenullableNR[0/13255] Number of R-band observationsmeta.numberintRPer[0.1/29.35]? Period from R-band observations (3)dtime.periodfloatnullablel_RFAP[<] Upper limit flag on RFAPmeta.code.errorcharRFAP? False Alarm Probability from R-band observations (3)stat.fit.goodnessdoublenullableNV[0/174] Number of V-band observationsmeta.numberintVPer[0.11/29.77]? Period from V-band observations (3)dtime.periodfloatnullablel_VFAP[<] Upper limit flag on VFAPmeta.code.errorcharVFAP? False Alarm Probability from V-band observations (3)stat.fit.goodnessdoublenullablePAdopt[0.11/29.77] Final, adopted period (3)dtime.periodfloatf_PAdopt[*] Best period flag (4)meta.codecharB07Indicates a star in Briceno et al. 2007 (Cat. J/ApJ/661/1119)meta.numberintnullableB05Indicates a star in Briceno et al. 2005 (Cat. J/AJ/129/907)meta.numberintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar