J/ApJ/747/51ivo://CDS.VizieR/J/ApJ/747/51doi:10.26093/cds/vizier.17470051CDSHenderson C.B.Stassun K.G.2017-06-22T14:28:15Z2013-10-24T11:00:15ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsopen-star-clustersstellar-massesastronomical-object-identificationinfrared-photometryvisible-astronomyphotometryx-ray-sourcesWe have conducted a long-term, wide-field, high-cadence photometric monitoring survey of ~50000 stars in the Lagoon Nebula H II region. This first paper presents rotation periods for 290 low-mass stars in NGC 6530, the young cluster illuminating the nebula, and for which we assemble a catalog of infrared and spectroscopic disk indicators, estimated masses and ages, and X-ray luminosities. The distribution of rotation periods we measure is broadly uniform for 0.5days<P<10days; the short-period cutoff corresponds to breakup. We observe no obvious bimodality in the period distribution, but we do find that stars with disk signatures rotate more slowly on average. The stars' X-ray luminosities are roughly flat with rotation period, at the saturation level (log L_X_/L_bol_{approx} -3.3). However, we find a significant positive correlation between L_X_/L_bol_ and corotation radius, suggesting that the observed X-ray luminosities are regulated by centrifugal stripping of the stellar coronae. The period-mass relationship in NGC 6530 is broadly similar to that of the Orion Nebula Cluster (ONC), but the slope of the relationship among the slowest rotators differs from that in the ONC and other young clusters. We show that the slope of the period-mass relationship for the slowest rotators can be used as a proxy for the age of a young cluster, and we argue that NGC 6530 may be slightly younger than the ONC, making it a particularly important touchstone for models of angular momentum evolution in young, low-mass stars.2012ApJ...747...51Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/747/51CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/548/A97 : Catalogue of variable stars in open clusters (Zejda+, 2012)J/A+A/546/A9 : Stars spectral classification in NGC 6530 (Prisinzano+, 2012)J/A+A/488/1221 : BMW-Chandra source catalog (Romano+, 2008)J/A+A/462/123 : VLT/Flames spectroscopic data of NGC 6530 (Prisinzano+, 2007)J/AJ/134/1368 : Proper motions in NGC 2244 and NGC 6530 (Chen+, 2007)J/other/ChJAA/6.435 : Proper motions in NGC 6530 (Zhao+, 2006)J/A+A/430/941 : Star formation region NGC 6530 (Prisinzano+, 2005)J/ApJS/161/118 : byH{alpha} photometry in open clusters (McSwain+, 2005)J/ApJ/608/781 : NGC 6530 Chandra X-ray catalog (Damiani+, 2004)J/A+A/395/499 : XMM observations in M8 and NGC6530 (Rauw+, 2002)J/AJ/120/333 : UBVRI and H{alpha} in NGC 6530 (Sung+, 2000)J/A+AS/123/63 : NGC 6530 multiwavelength photometry (van den Ancker+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/747/51https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/747/51http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/747/51https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/747/51https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/747/51http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/747/51GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/747/51/members (Cluster members parameters with definite or possible rotation periods)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/747/51/members?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/747/51/members?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/747/51/members?GETtext/xml+votable180.050000true271.09209-24.429640.0055555555555555566/28890 288912.367228618189496e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/747/51?format=asciiX-rayOpticalInfrareddefaultJ/ApJ/747/51/membersCluster members parameters with definite or possible rotation periodsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXID[2/875] X-ray identifier (Cat. J/ApJ/608/781; <[DFM2004] NNN> in Simbad)meta.id;meta.mainintWFI[646/38914] WFI identifier (Cat. J/A+A/430/941; <Cl* NGC 6530 WFI NNNNN> in Simbad)meta.id;meta.mainintRAJ2000[270.94/271.25] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-24.49/-24.20] Declination (J2000)degpos.eq.dec;meta.mainVmag[14.52/21.83] The V band magnitudemagphot.mag;em.opt.VfloatImag[13.27/18.05] The I band magnitudemagphot.mag;em.opt.IfloatPer[0.1/19.1] Rotation perioddtime.perioddoubleu_PerSimbad column added by the CDSmeta.code.membercharMass[0.2/2.1] MasssolMassphys.massfloatAge[0.1/22.3] AgeMyrtime.agefloatLbol[0.1/7.1] Bolometric luminositysolLumphys.luminosityfloatRad[0.8/4.5] RadiussolRadphys.size.radiusfloatlogLX[29/32] Log of X-ray luminosity; in erg/slog(1e-07W)phys.luminosity;em.X-rayfloatIR?[Y/N/-] IR excess?meta.codecharHa[C/W/-] Prisinzano et al. 2007 (J/A+A/462/123) H{alpha} TTau class (Classical or Weak-lined)meta.code.classcharr_Ha[b] b=Taken from Arias et al. (2007MNRAS.374.1253A)meta.ref;pos.framecharSB2?[Y/N/-] Spectroscopic binary candidate?meta.codecharPCross-match with Cat. J/A+A/462/123, J/A+A/430/941 and J/A+A/546/A9 within 1"meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.refchar