J/ApJ/549/578ivo://CDS.VizieR/J/ApJ/549/578doi:10.26093/cds/vizier.15490578CDSDegioia-Eastwood K.Throop H.Walker G.Cudworth K.M.2018-01-10T11:47:41Z2001-07-14T13:58:38ZCDS support team

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

cds-question@unistra.fropen-star-clusterspre-main-sequence-starsccd-photometryvisible-astronomybroad-band-photometryH-R diagrams are presented for the very young galactic clusters Trumpler 14 and Trumpler 16, which are the two most populous clusters in the region of vigorous star formation surrounding {eta} Carinae. Point spread function photometry of UBV CCD images is presented down to V~19 for over 560 stars in Tr 16 and 290 stars in Tr 14. We have also obtained similar data for a local background field. After determining cluster membership through proper motions from a previous work, we find that the reddening of cluster members is significantly lower than that of the local background stars. Thus, we are able to use individual reddenings to identify likely members at far deeper levels than possible with proper motions. This work has revealed a significant population of pre-main-sequence (PMS) stars in both clusters. The location of the PMS stars in the H-R diagram indicates that the theoretical "stellar birthline" of Palla & Stahler (1990ApJ...360L..47P, follows the locus of stars far better than that of Beech & Mitalas (1994ApJS...95..517B). Comparison with both pre- and post-main-sequence isochrones also reveals that although intermediate-mass stars have been forming continuously over the last 10Myr, the high-mass stars formed within the last 3Myr. There is no evidence that the formation of the intermediate-mass stars was truncated by the formation of the high-mass stars.2001ApJ...549..578Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/549/578CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/116/75 : Region of the open cluster Tr 14 (Vazquez+, 1996)J/AJ/105/980 : Stellar content of Tr 14 and Tr 16 (Massey+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/549/578https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/549/578http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/549/578https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/549/578https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/549/578http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/549/578GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/549/578/table1 (Trumpler 14: new photometry and astrometric positions for J2000)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/549/578/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/549/578/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/549/578/table1?GETtext/xml+votable180.050000true160.909125-59.57830560.005555555555555556Cone search capability for table J/ApJ/549/578/table2 (Trumpler 16: new photometry and astrometric positions for J2000)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/549/578/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/549/578/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/549/578/table2?GETtext/xml+votable180.050000true161.1163333-59.7560.0055555555555555566/38016https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/549/578?format=asciiOpticaldefaultJ/ApJ/549/578/table4Stars used for spectroscopic parallaxNameName (1)meta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadSimbad column added by the CDSmeta.refcharMembMembership probability%stat.fit.goodnessintSpTypeSpectral typesrc.spTypecharr_SpTypeReference for spectral type (2)meta.refcharVmagV magnitudemagphot.mag;em.opt.VfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.VfloatVMAGAbsolute V magnitudemagphys.magAbs;em.optfloat(B-V)0Dereddened B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatAVAbsorption in V bandmagphys.absorptionfloatV0-MVDereddened minus absolute V magnitudemagphot.mag.distModfloatJ/ApJ/549/578/table1Trumpler 14: new photometry and astrometric positions for J2000LinkCross-identificationsmeta.refcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (1)pos.eq.dec;meta.mainVmagV band magnitudemagphot.mag;em.opt.VfloatB-VThe B-V colormagphot.color;em.opt.B;em.opt.VfloatU-B? The U-B colormagphot.color;em.opt.U;em.opt.BfloatnullableJ/ApJ/549/578/table2Trumpler 16: new photometry and astrometric positions for J2000recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLinkCross-identificationsmeta.refcharRAJ2000Right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (1)pos.eq.dec;meta.mainVmagV band magnitudemagphot.mag;em.opt.VfloatB-VThe B-V colormagphot.color;em.opt.B;em.opt.VfloatU-B? The U-B colormagphot.color;em.opt.U;em.opt.BfloatnullableJ/ApJ/549/578/table3Cross-identifications for some starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDETWCStar designationmeta.id;meta.maincharFesFeinstein et al., 1973A&AS...12..331F, designation, Cl Trumpler NN NNN in SimbadcharMJ? Massey & Johnson, 1993, Cat. <J/AJ/105/980> designation, Cl* Trumpler NN MJ NNN in Simbadmeta.idintnullableOtherOther names (1)meta.idchar