J/MNRAS/405/1711ivo://CDS.VizieR/J/MNRAS/405/1711doi:10.26093/cds/vizier.74051711CDSMcDonald I.van Loon J.T.Dupree A.K.Boyer M.L.2024-07-11T20:16:44Z2011-01-10T13:20:34ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starsinfrared-photometryvisible-astronomyphotometrysloan-photometryWe present a search for long-period variable (LPV) stars among giant branch stars in M15 which, at [Fe/H]~-2.3, is one of the most metal-poor Galactic globular clusters. We use multicolour optical photometry from the 0.6-m Keele Thornton and 2-m Liverpool Telescopes. Variability of {delta}V~0.15mag is detected in K757 and K825 over unusually long time-scales of nearly a year, making them the most metal-poor LPVs found in a Galactic globular cluster. K825 is placed on the long secondary period sequence, identified for metal-rich LPVs, though no primary period is detectable. We discuss this variability in the context of dust production and stellar evolution at low metallicity, using additional spectra from the 6.5-m Magellan (Las Campanas) telescope. A lack of dust production, despite the presence of gaseous mass loss raises questions about the production of dust and the intracluster medium of this cluster.2010MNRAS.405.1711Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/405/1711CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/405/1711https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/405/1711http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/405/1711https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/405/1711https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/405/1711http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/405/1711GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/405/1711/stars (Candidate variable giant stars in M15 from Mosley & White (1975BAAS....7..535M) with)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/405/1711/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/405/1711/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/405/1711/stars?GETtext/xml+votable180.050000true322.454458312.15055560.0055555555555555566/124053.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/405/1711?format=asciiOpticalInfrareddefaultJ/MNRAS/405/1711/starsCandidate variable giant stars in M15 from Mosley & White (1975BAAS....7..535M) withl_Mm[~] Limit flag on Mmmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (from Mosley & White 1975BAAS....7..535M)meta.id;meta.maincharArpArp designation (1955AJ.....60..317A, Cl* NGC 7078 ARP A-NNN)meta.idcharBuo? Buonanno et al, 1983A&AS...51...83B number (Cl* NGC 7078 BBFP NNN)meta.noteintnullableSanSandage, 1970ApJ...162..841S designation (Cl* NGC 7078 SANDA SN)meta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainMmMembership probability%meta.code.memberintHRV? Heliocentric radial velocitieskm/sspect.dopplerVeloc;pos.heliocentricfloatnullableVmagV magnitudemagphot.mag;em.opt.VfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.VfloatVar?Variability found ?meta.code;src.varcharl_Per[~] Limit flag on Permeta.code.errorcharPer? Perioddtime.periodintnullablee_Per? rms uncertainty on Perdstat.errorintnullableu_Per[?] Uncertainty flag on Permeta.code.errorcharLCPlot the light curvemeta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idchar