The Nucleus of C16.16: Another Case of a Double-peaked Active Galactic Nucleus
Author
dc.contributor.author
Rodriguez-Ardila, A.
Author
dc.contributor.author
Pastoriza, M. G.
es_CL
Author
dc.contributor.author
Bica, Eduardo
es_CL
Author
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Maza Sancho, José
es_CL
Admission date
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2014-01-10T15:27:49Z
Available date
dc.date.available
2014-01-10T15:27:49Z
Publication date
dc.date.issued
1996-06
Cita de ítem
dc.identifier.citation
Astrophysical Journal, 463:522-527
en_US
Identifier
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DOI: 10.1086/177266
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/126186
Abstract
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^-1^) Balmer component is also found. These two components seem to arise by different processes.