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dc.contributor.authorBica, Eduardo Luiz Damianipt_BR
dc.contributor.authorPastoriza, Miriani Griseldapt_BR
dc.contributor.authorMaia, Marcio Antonio Geimbapt_BR
dc.contributor.authorSilva, Luiz Augusto Leitão dapt_BR
dc.contributor.authorDottori, Horacio Albertopt_BR
dc.date.accessioned2014-12-04T02:13:38Zpt_BR
dc.date.issued1991pt_BR
dc.identifier.issn0004-6256pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/107729pt_BR
dc.description.abstractGalaxy spectra from a subsample of the Southern Sky Redshift Survey data bank were used to study the equivalent width plane for the lines Na I λ 5893 Å vs Mg I λ 5175 Å. We try to estimate how important the contribution of the interstellar gas for the sodium line is compared to that of the stellar population. The sample is made up of galaxies with morphological types from E to Se and are distributed up to radial velocities of 25 000 km s-ˡ , most of them smaller than 15 000 km s-ˡ. Most early type galaxies with dust lanes, particularly nearly edge-on SO's, present an enhancement of the Na I line. Inclined spiral galaxies tend to present enhanced Na I with respect to face-on spirals. This tendency, previously found in a smaller sample of galaxies limited to V≤6000 km s-ˡ,is now confirmed for more distant ones. In the large velocity sample we are observing the global bulge rather than the very nucleus; the persistence of the effect suggests that the scale height of the gas layer in the central disk can reach a considerable fraction of the bulge radius.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofThe Astronomical journal. Woodbury. Vol. 102, no. 5 (Nov. 1991), p. 1702-1714pt_BR
dc.rightsOpen Accessen
dc.subjectMateria interestelarpt_BR
dc.subjectGalaxias espiraispt_BR
dc.subjectAstrofisica extragalaticapt_BR
dc.titleThe plane W(Na I) x W (Mg I) : effects of interstellar Na I in a sample of southern galaxiespt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000055290pt_BR
dc.type.originEstrangeiropt_BR


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