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dc.contributor.authorDors Júnior, Oli Luizpt_BR
dc.contributor.authorHägelle, Guillermo Federicopt_BR
dc.contributor.authorCardaci, Mónica V.pt_BR
dc.contributor.authorPérez-Montero, Enriquept_BR
dc.contributor.authorKrabbe, Angela Cristinapt_BR
dc.contributor.authorVilchez, Jose M.pt_BR
dc.contributor.authorSales, Dinalva Aires dept_BR
dc.contributor.authorRiffel, Rogériopt_BR
dc.contributor.authorRiffel, Rogemar Andrépt_BR
dc.date.accessioned2014-04-13T01:50:01Zpt_BR
dc.date.issued2013pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/93391pt_BR
dc.description.abstractWe have used observational spectroscopic data of star-forming regions compiled from the literature and photoionization models to analyse the neon ionic abundances obtained using both optical and mid-infrared emission lines. Comparing Ne++/H+ ionic abundances from distinct methods, we have found that, on average, the abundances obtained via infrared emission lines are higher than those obtained via optical lines, by a factor of 4. Photoionization models with abundance variations along the radius of the hypothetical nebula provide a possible explanation for a large part of the difference between ionic abundances via optical and infrared emission lines. The ionization correction factor (ICF) for the neon is obtained from direct determinations of ionic fractions using infrared emission lines. We derive a constant Ne/O ratio (log Ne/O ≈ −0.70) for a large range of metallicities, independently of the ICF used to compute the neon total abundance.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the royal astronomical society. Oxford. Vol. 432, no. 3 (July 2013), p. 2512-2528pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxies: abundancesen
dc.subjectFormacao de galaxiaspt_BR
dc.subjectGalaxies: evolutionen
dc.subjectFotoionizacaopt_BR
dc.subjectComposicao estelarpt_BR
dc.subjectGalaxies: formationen
dc.subjectGalaxies: generalen
dc.subjectEspectros estelarespt_BR
dc.subjectGalaxies: ISMen
dc.titleOptical and mid-infrared neon abundance determinations in star-forming regionspt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000903227pt_BR
dc.type.originEstrangeiropt_BR


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