Optical and far-infrared emission of IRAS Seyfert galaxies
dc.contributor.author | Bonatto, Charles Jose | pt_BR |
dc.contributor.author | Pastoriza, Miriani Griselda | pt_BR |
dc.date.accessioned | 2015-01-07T02:10:38Z | pt_BR |
dc.date.issued | 1997 | pt_BR |
dc.identifier.issn | 0004-637X | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/108770 | pt_BR |
dc.description.abstract | This paper presents an analysis of moderately large samples of type 1 and 2 Seyfert galaxies through optical observations and far-infrared IRAS data, also taking into account theoretical color indices derived from dust emission models. The galaxies in the samples cover a rather large interval in far infrared luminosity, i.e., 7.6 ≤log (LIR/Lʘ)≤12.6. We show that both types of Seyferts have approx- imately the same distribution of number of objects with a given LIR. Galaxies with similar far-infrared color indices α(100, 60) are grouped together, and the corresponding average color indices are interpreted in terms of a simple model in which the observed colors result from the combination of dust directly heated by the active galactic nucleus with a component from the host galaxy represented by the emission of cool dust. On the basis of the average IRAS colors of the derived groups, we show that type 1 and 2 /L Seyfert galaxies are undistinguishable from each other. From the luminosity ratios LIR/Ha and LIR/L[O III], we show that basically the same model can be applied to both types of Seyfert, only allowing for the variation of model conditions : type 2 Seyferts would be like type 1 Seyferts but with the Seyfert nucleus and broad line region more efectively "hidden" by dust. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | The astrophysical journal. Chicago. Vol. 486, no. 1, pt. 1 (Sept. 1997), p. 132-146 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Materia interestelar | pt_BR |
dc.subject | Dust, extinction | en |
dc.subject | Galaxies : photometry | en |
dc.subject | Poeira cosmica | pt_BR |
dc.subject | Galaxias seyfert | pt_BR |
dc.subject | Galaxies : seyfert | en |
dc.subject | Infrared : galaxies | en |
dc.subject | Nucleo galatico | pt_BR |
dc.title | Optical and far-infrared emission of IRAS Seyfert galaxies | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000152359 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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