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Excitation and temperature of extended gas in active galaxies. I Observations

dc.contributor.authorStorchi-Bergmann, Thaisapt_BR
dc.contributor.authorWilson, Andrew S.pt_BR
dc.contributor.authorBinette, Lucpt_BR
dc.contributor.authorMulchaey, John Scottpt_BR
dc.date.accessioned2014-07-23T02:04:39Zpt_BR
dc.date.issued1996pt_BR
dc.identifier.issn0004-6361pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/98390pt_BR
dc.description.abstractWe have obtained long-slit spectroscopy of five active galaxies showing extended high excitation emission lines reaching distances of several kiloparsecs from the nuclei. Measurement of the fluxes of weak lines, such as [OIII]λ4363 and HeIIλ4686, requires careful subtraction of the contribution of the stellar population, and the procedure for this subtraction is discussed in detail. For each galaxy, we present emission-line ratios for the nucleus and the extended gas at the most distant locations for which the fluxes of the weaker high excitation lines can be measured with an uncertainty ≤30%. In a companion paper (Paper II), these line ratios are used in a reevaluation of photoionization models of extended gas in active galaxies.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofAstronomy and Astrophysics. Berlin. Vol. 312, no. 2 (Aug. 1996), p. 357-364pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxies: activeen
dc.subjectAstrofisica extragalaticapt_BR
dc.subjectGalaxias seyfertpt_BR
dc.subjectGalaxies: ISMen
dc.subjectFotoionizacaopt_BR
dc.subjectGalaxies: nucleien
dc.subjectGalaxies: Seyferten
dc.subjectNucleo galaticopt_BR
dc.subjectGaláxiaspt_BR
dc.subjectTemperaturapt_BR
dc.subjectPopulacoes estelarespt_BR
dc.titleExcitation and temperature of extended gas in active galaxies. I Observationspt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000148831pt_BR
dc.type.originEstrangeiropt_BR


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