The nucleus of C16.16 : another case of a double-peaked active galactic nucleus
dc.contributor.author | Rodriguez-Ardila, Alberto | pt_BR |
dc.contributor.author | Pastoriza, Miriani Griselda | pt_BR |
dc.contributor.author | Bica, Eduardo Luiz Damiani | pt_BR |
dc.contributor.author | Maza, Jose | pt_BR |
dc.date.accessioned | 2015-01-07T02:10:37Z | pt_BR |
dc.date.issued | 1996 | pt_BR |
dc.identifier.issn | 0004-637X | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/108767 | pt_BR |
dc.description.abstract | We 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.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | The astrophysical journal. Chicago. Vol. 463, no. 2, pt. 1 (June 1996), p. 522-527 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Astrofisica extragalatica | pt_BR |
dc.subject | Galaxies: individual (C16.16) | en |
dc.subject | Galaxies: nuclei | en |
dc.subject | Nucleo galatico | pt_BR |
dc.subject | Galaxies: seyfert | en |
dc.subject | Discos de acrecao | pt_BR |
dc.subject | Galaxias seyfert | pt_BR |
dc.subject | Line: profiles | en |
dc.subject | Espectros astronômicos | pt_BR |
dc.title | The nucleus of C16.16 : another case of a double-peaked active galactic nucleus | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000148737 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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