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dc.contributor.authorRodriguez-Ardila, Albertopt_BR
dc.contributor.authorPastoriza, Miriani Griseldapt_BR
dc.contributor.authorBica, Eduardo Luiz Damianipt_BR
dc.contributor.authorMaza, Josept_BR
dc.date.accessioned2015-01-07T02:10:37Zpt_BR
dc.date.issued1996pt_BR
dc.identifier.issn0004-637Xpt_BR
dc.identifier.urihttp://hdl.handle.net/10183/108767pt_BR
dc.description.abstractWe study optical spectra in high and low activity states of the faint, distant Seyfert 1 galaxy C16.16. A strong stellar population contribution to the continuum is observed, even in the high-state spectrum. The low-ionization emission lines show large equivalent widths. Narrow-line ratios are used to parameterize and investigate the physical conditions in the narrow-line region. Photoionization models with nitrogen depletion, ionization continuum typical of an active galactic nucleus (AGN), and an ionization parameter U = 10 -2.8 reproduce the observed narrow lines. The AGN continuum shows a strong variation, while the Balmer lines vary moderately. The Balmer lines have a broad and asymmetric component with double-peaked structure. Using the profiles of emission lines originated in a relativistic circular disk, we successfully fit the observed broad Hα profile. This disk component shows no variation in the observations. A variable, intermediate-width (~6000 km s-ˡ) Balmer component is also found. These two com­ ponents seem to arise by different processes.pt_BR
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofThe astrophysical journal. Chicago. Vol. 463, no. 2, pt. 1 (June 1996), p. 522-527pt_BR
dc.rightsOpen Accessen
dc.subjectAstrofisica extragalaticapt_BR
dc.subjectGalaxies: individual (C16.16)en
dc.subjectGalaxies: nucleien
dc.subjectNucleo galaticopt_BR
dc.subjectDiscos de acrecaopt_BR
dc.subjectGalaxies: seyferten
dc.subjectGalaxias seyfertpt_BR
dc.subjectLine: profilesen
dc.subjectEspectros astronômicospt_BR
dc.titleThe nucleus of C16.16 : another case of a double-peaked active galactic nucleuspt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000148737pt_BR
dc.type.originEstrangeiropt_BR


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