J/A+A/372/85ivo://CDS.VizieR/J/A+A/372/85doi:10.26093/cds/vizier.33720085CDSRamdani A.Jorissen A.2001-06-09T16:43:14Z2001-06-09T16:38:48ZCDS support team

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

cds-question@unistra.frglobular-star-clustersinfrared-sourcesapparent-magnitudeinfrared-photometrygiant-starsThe present paper investigates the properties of the dust mass loss in stars populating the giant branch of the globular cluster 47 Tuc, by combining ISOCAM and DENIS data. Raster maps of 5 fields covering areas ranging from 4x4 to 15x15arcmin^2^ at different distances from the center of the cluster have been obtained with ISOCAM at 11.5{mu}m (LW10 filter). The covered fields include most of the red variables known in this cluster. A detection threshold of about 0.2 mJy is achieved, allowing us to detect giant stars at 11.5{mu}m all the way down to the horizontal branch. No dust-enshrouded asymptotic giant branch stars have been found in the observed fields, contrary to the situation encountered in LMC/SMC globular clusters with larger turnoff masses. The color index [12]-[2] (based on the ISO 11.5{mu}m flux and on the DENIS K_S_ magnitude) is used as a diagnostic of dust emission (and hence dust mass loss). Its evolution with luminosity along the giant branch reveals that dust mass loss is only present in V3 (the only cluster Mira variable observed in the present study) and in V18, a star presenting intermittent variability. This conclusion confirms the importance of stellar pulsations in the dust formation and ensuing mass loss.2001A&A...372...85Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/372/85CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/denis : The DENIS database (Epchtein+, 1999)V/97 : Updated 3rd Cat Variable Stars in Globular Clusters (Clement+ 1997)J/A+AS/93/293 : Astrometry of globular clusters (47 Tuc) (Tucholke 1992)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/372/85https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/372/85http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/372/85https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/372/85https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/372/85http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/372/85GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/372/85/stars (Star positions (from Simbad))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/372/85/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/372/85/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/372/85/stars?GETtext/xml+votable180.050000true6.909167-71.8827780.0055555555555555566/33321 33323https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/372/85?format=asciiInfrareddefaultJ/A+A/372/85/starsStar positions (from Simbad)NameSource namemeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000? Right ascension (J2000)pos.eq.ra;meta.mainnullableDEJ2000? Declination (J2000)pos.eq.dec;meta.mainnullableSNameSimbad namemeta.idcharSimbadask the SIMBAD data-base about this objectmeta.refcharJ/A+A/372/85/table3List of sources detected at 12 microns, in order of increasing V magnitudeVNameVariable name (2)meta.idcharNameName of the source (1)meta.id.part;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVmag? V magnitude (3)magphot.mag;em.opt.VfloatnullableKsmag? DENIS Ks magnitude (or K when K < 6.5) (4)magphot.mag;em.IR.KfloatnullableV-Ks? V-Ks color indexmagphot.color;em.opt.V;em.IR.Kfloatnullable12umISOCAM magnitude at 12{mu}m (filter LW-10) (5)magphot.flux.density;em.IR.8-15umfloatF12/F2? Flux density ratio at 12 and 2 microns (6)phot.flux;arith.ratiofloatnullablee_F12/F2? Uncertainty on F12/F2 (from F12 only)stat.errorfloatnullableFieldField numberobs.fieldcharRemarkRemark about non-membershipmeta.notechar