J/MNRAS/492/1008ivo://CDS.VizieR/J/MNRAS/492/1008doi:10.26093/cds/vizier.74921008CDSGillen E.Briegal J.T.Hodgkin S.T.Foreman-Mackey D.Van Leeuwen F.,Jackman J.A.G.McCormac J.West R.G.Queloz D.Bayliss D.Goad M.R.,Watson C.A.Wheatley P.J.Belardi C.Burleigh M.R.Casewell S.L.,Jenkins J.S.Raynard L.Smith A.M.S.Tilbrook R.H.Vines J.I.2024-08-20T20:15:18Z2023-05-24T13:27:10ZCDS support team

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

cds-question@unistra.frvariable-starsmultiple-starsopen-star-clustersphotometrystellar-spectral-typesvisible-astronomyWe determine rotation periods for 127 stars in the ~115-Myr-old Blanco 1 open cluster using ~200d of photometric monitoring with the Next Generation Transit Survey. These stars span F5-M3 spectral types (1.2M_{sun}_>~M>~0.3M_{sun}_) and increase the number of known rotation periods in Blanco 1 by a factor of four. We determine rotation periods using three methods: Gaussian process (GP) regression, generalized autocorrelation function (G-ACF), and Lomb-Scargle (LS) periodogram, and find that the GP and G-ACF methods are more applicable to evolving spot modulation patterns. Between mid-F and mid-K spectral types, single stars follow a well-defined rotation sequence from ~2 to 10d, whereas stars in photometric multiple systems typically rotate faster. This may suggest that the presence of a moderate-to-high mass ratio companion inhibits angular momentum loss mechanisms during the early pre-main sequence, and this signature has not been erased at ~100Myr. The majority of mid-F to mid-K stars display evolving modulation patterns, whereas most M stars show stable modulation signals. This morphological change coincides with the shift from a well-defined rotation sequence (mid-F to mid-K stars) to a broad rotation period distribution (late-K and M stars). Finally, we compare our rotation results for Blanco 1 to the similarly aged Pleiades: the single-star populations in both clusters possess consistent rotation period distributions, which suggests that the angular momentum evolution of stars follows a well-defined pathway that is, at least for mid-F to mid-K stars, strongly imprinted by ~100Myr.2020MNRAS.492.1008Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/492/1008CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/492/1008https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/492/1008http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/492/1008https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/492/1008https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/492/1008http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/492/1008GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/492/1008/table1 (Identification, photometric, multiplicity, and period information for periodic Blanco 1 stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/1008/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/1008/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/1008/table1?GETtext/xml+votable180.050000true1.72374583-28.518959720.005555555555555556Cone search capability for table J/MNRAS/492/1008/table2 (Identification, photometric, and multiplicity information for Blanco 1 stars without a detected period)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/1008/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/1008/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/1008/table2?GETtext/xml+votable180.050000true1.8071875-28.910817780.0055555555555555565/4122 6/16445 16447 16483 16492 16494 16533 16576-165777.952274030004205e-20 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/492/1008?format=asciiOpticaldefaultJ/MNRAS/492/1008/table1Identification, photometric, multiplicity, and period information for periodic Blanco 1 starsSimbadSimbad column added by the CDSmeta.ref.urlcharSpTypeSpectral type (G2)src.spTypecharMult[c/r/cr/ ] Method used to determine the multiplicity of the system (G3)meta.codecharampdataAmplitude of the data (1)src.var.amplitudefloatampGPAmplitude of the GP model (1)src.var.amplitudefloatPGPPeriod estimate from GP regressiondtime.perioddoubleE_PGPUpper 1-{sigma} error on PGPdstat.error;stat.maxdoublePadopPeriod adopteddtime.perioddoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[626/20343] Internal NGTS object identifiermeta.idintGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainNGTSmagNGTS 520-890nm band magnitude (G1)magphot.mag;em.optfloatGmagGaia DR2 G band magnitude (G1)magphot.mag;em.optfloatBPmagGaia DR2 BP band magnitude (G1)magphot.mag;em.opt.BfloatRPmagGaia DR2 RP band magnitude (G1)magphot.mag;em.opt.RfloatKsmagKs-band magnitude (G1)magphot.mag;em.IR.KfloatG-KsG-Ks colour index (G1)magphot.color;em.opt;em.IRfloate_PGPLower 1-{sigma} error on PGPdstat.errordoublePLSPeriod estimate from Lomb-Scargledtime.perioddoublePGACF? Period estimate from G-ACFdtime.perioddoublenullableMethodMethod selected for final period (GP, LS or GACF) (2)meta.notecharJ/MNRAS/492/1008/table2Identification, photometric, and multiplicity information for Blanco 1 stars without a detected periodSimbadSimbad column added by the CDSmeta.ref.urlcharKsmagKs-band magnitude (G1)magphot.mag;em.IR.KfloatG-KsG-Ks colour index (G1)magphot.color;em.opt;em.IRfloatSpTypeSpectral type (G2)src.spTypecharMult[c/r/cr/ ] Method used to determine the multiplicity of the system (G3)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[3284/18932] Internal NGTS object identifiermeta.idintGaiaDR2Gaia DR2 source identifiermeta.id;meta.mainRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainNGTSmagNGTS 520-890nm band magnitude (G1)magphot.mag;em.optfloatGmagGaia DR2 G band magnitude (G1)magphot.mag;em.optfloatBPmagGaia DR2 BP band magnitude (G1)magphot.mag;em.opt.BfloatRPmagGaia DR2 RP band magnitude (G1)magphot.mag;em.opt.Rfloat