J/MNRAS/370/954ivo://CDS.VizieR/J/MNRAS/370/954doi:10.26093/cds/vizier.73700954CDSIrwin J.Aigrain S.Hodgkin S.Irwin M.Bouvier J.Clarke C.Hebb L.,Moraux E.2024-07-03T20:13:50Z2007-04-28T22:58:08ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomyphotometryh-alpha-photometryWe report on the results of a V- and i-band time-series photometric survey of M34 (NGC 1039) using the Wide Field Camera (WFC) on the Isaac Newton Telescope (INT), achieving better than 1 per cent precision per data point for 13~<i~<17. Candidate cluster members were selected from a V versus VI colour-magnitude diagram over 14<V<24 (0.12<M/M_{sun}_<1.0), finding 714 candidates, of which we expect ~400 to be real cluster members (taking into account contamination from the field). The mass function was computed, and found to be consistent with a lognormal distribution in dN/dlogM. Searching for periodic variable objects in the candidate members gave 105 detections over the mass range 0.25<M/M_{sun}_<1.0. The distribution of rotation periods for 0.4<M/M_{sun}_<1.0 was found to peak at ~7d, with a tail of fast rotators down to periods of ~0.8d. For 0.25<M/M_{sun}_<0.4 we found a peak at short periods, with a lack of slow rotators (e.g. P>5d), consistent with the work of other authors at very low masses. Our results are interpreted in the context of previous work, finding that we reproduce the same general features in the rotational period distributions. A number of rapid rotators were found with velocities ~ a factor of 2 lower than in the Pleiades, consistent with models of angular momentum evolution assuming solid body rotation without needing to invoke core-envelope decoupling.2006MNRAS.370..954Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/370/954CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/111/1193 : Proper motion in M34 (Jones+ 1996)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/370/954https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/370/954http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/370/954https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/370/954https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/370/954http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/370/954GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/370/954/tablea1 (Summary of the properties of our 105 M34 rotation candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/370/954/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/370/954/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/370/954/tablea1?GETtext/xml+votable180.050000true40.73742.58944440.0055555555555555566/2395 2417https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/370/954?format=asciiOpticalInfrareddefaultJ/MNRAS/370/954/tablea1Summary of the properties of our 105 M34 rotation candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM34Identifier (N-NNNN), Cl* NGC 1039 IAH N-NNN in Simbadmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagJohnson V magnitudemagphot.mag;em.opt.VfloatRcmag? Cousins R magnitudemagphot.mag;em.opt.RfloatnullableIcmagCousins I magnitudemagphot.mag;em.opt.IfloatHamagH{alpha} magnitude (approximately equivalent to r-band magnitudes for a continuum source)magphot.flux;em.line.HalphafloatPerPerioddtime.periodfloatn_Per[abc] Note on Per (1)meta.notecharAVAmplitude in V bandmagphot.mag;em.opt.VfloatAIAmplitude in I bandmagsrc.var.amplitudefloatMassInterpolated mass (derived using I magnitude)solMassphys.massfloatRadInterpolated radius (derived using I magnitude)solRadphys.size.radiusfloatJP? Jones & Prosser (1996, Cat. <J/AJ/111/1193>) number, Cl* NGC 1039 JP NNN in Simbadmeta.idintnullablevsini? Rotational velocitykm/sphys.veloc.rotatfloatnullable