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dc.contributor.authorBica, Eduardo Luiz Damianipt_BR
dc.contributor.authorJablonka, Pascalept_BR
dc.contributor.authorSantos Junior, Joao Francisco Coelho dospt_BR
dc.contributor.authorAlloin, Danielle Mariept_BR
dc.contributor.authorDottori, Horacio Albertopt_BR
dc.date.accessioned2014-07-22T02:03:34Zpt_BR
dc.date.issued1992pt_BR
dc.identifier.issn0004-6361pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/98350pt_BR
dc.description.abstractThe star clusters G 158 and G 177, located at projected distances smaller than 1.5 kpc from the semi-stellar nucleus of M 31, show spectra extreme in absorption-line strengths, comparable to those from the nuclei of giant ellipticals or from the M 31 nucleus itself. A synthesis has been performed of the integrated spectrum of the Galactic globular cluster 47 Tucanae ([Fe/H]= –0.7) with a solar neighbourhood stellar library: as expected, lines of elements like Mg and Fe are stronger in the solar metallicity model. In turn, 47 Tuc presents a blue-violet blanketing excess which, from a detailed study of the spectral residuais (47 Tuc-model) using laboratory molecular patterns, was found to arise from molecules containing C, N and O. In this Research Note we discuss, at a much higher metallicity level, a very similar blanketing excess observed in G 177 with respect to G 158. We suggest that G 177 is an inner bulge cluster, whereas G 158 is an inner disc one, in analogy with the difference found between the halo cluster 47 Tuc and the model which simulates an old cluster with disc stars. In this scenario the [O/Fe] overabundance, known to exist in metal poor Galactic halo stars as compared to the disc, would persist through the bulge and inner bulge. The inner disc stars might have in common with solar neighbourhood ones the solar CNO/Fe ratio.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofAstronomy and Astrophysics. Berlin. Vol. 260, no. 1/2 (July 1992), p. 109-111pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxies: individual M 31en
dc.subjectAstrofísicapt_BR
dc.subjectClusters: globularen
dc.subjectAstronomia e astrofisicapt_BR
dc.subjectAglomerados de galaxiaspt_BR
dc.subjectGalaxy: bulgeen
dc.subjectGalaxy: discen
dc.subjectAglomerados estelares e associacoespt_BR
dc.subjectGalaxies: stellar content ofen
dc.subjectMetalicidadept_BR
dc.subjectHalospt_BR
dc.subjectSpectroscopyen
dc.subjectAbundanciapt_BR
dc.subjectStars: abundancesen
dc.subjectAglomerado globular 47 Tucpt_BR
dc.subjectGalaxias elipticaspt_BR
dc.subjectGaláxiaspt_BR
dc.titleSuper metal-rich clusters g158 and g177 in m31 : clues on the inner bulge/disc transitionpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000055979pt_BR
dc.type.originEstrangeiropt_BR


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