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dc.contributor.authorBonatto, Charles Josept_BR
dc.contributor.authorBica, Eduardo Luiz Damianipt_BR
dc.contributor.authorGirardi, Leo Albertopt_BR
dc.date.accessioned2014-07-24T02:04:30Zpt_BR
dc.date.issued2004pt_BR
dc.identifier.issn0004-6361pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/98531pt_BR
dc.description.abstractWe study classical disk clusters at nearly solar metallicity with ages in the range 200 Myr – 6Gyr using 2MASS photometry and theoretical isochrones. As a first step we employ J, H and K Johnson’s Padova isochrones which, on a large scale, result in a good fit of the observed data. However, we find some significant deviations, especially in the red giant branch for intermediate age clusters and the low-mass main-sequence end in general. Subsequently, isochrones involving the 2MASS J, H and KS transmission curves were generated which account for differences of ≈ 0.02 of the above deviations, in the sense required by the 2MASS observations. However, these corrections are not enough to fully account for the observed differences.We suggest that the remaining deviations should be accounted for by model atmosphere limitations, particularly the lack of molecular opacity data in low-temperature giants. Future models will incorporate these updated data in order to produce isochrones suitable for the whole range of stellar masses.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofAstronomy and astrophysics. Vol. 415, no. 2 (Feb. 2004), p. 571-576pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxy: open clusters and associations: generalen
dc.subjectAstronomiapt_BR
dc.subjectEstrelas gigantespt_BR
dc.subjectStars: Hertzsprung-Russell (HR) and C-M diagramsen
dc.subjectAglomerados estelarespt_BR
dc.subjectAtmosferas estelarespt_BR
dc.subjectEvolucao estelarpt_BR
dc.subjectMassa estelarpt_BR
dc.subjectFotometria estelarpt_BR
dc.subjectEspectros estelarespt_BR
dc.titleTheoretical isochrones compared to 2MASS observations : open clusters at nearly solar metallicitypt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000459302pt_BR
dc.type.originEstrangeiropt_BR


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