Repositório Digital

A- A A+

Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. VI. Variability of NGC 3783 from ground-based data

.

Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. VI. Variability of NGC 3783 from ground-based data

Mostrar registro completo

Estatísticas

Título Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. VI. Variability of NGC 3783 from ground-based data
Autor Stirpe, Giovanna M.
Winge, Claudia
Altieri, B.
Alloin, Danielle Marie
Aguero, E.L.
Anupama, G.C.
Ashley, R.
Bertram, R.
Calderon, J.H.
Catchpole, R.M.
Corradi, R.L.M.
Covino, E.
Dottori, Horacio Alberto
Feast, M.W.
Ghosh, K.K.
Hutton, R. Gil
Glass, I.S.
Grebel, Eva K.
Jorda, L.
Koen, C.
Laney, C.D.
Maia, Marcio Antonio Geimba
Marang, Fred
Mayya, Y.D.
Morrell, Nidia
Nakada, Y.
Pastoriza, Miriani Griselda
Pati, A.K.
Pelat, D.
Peterson, Bradley M.
Prabhu, T.P.
Roberts, G.
Sagar, R.
Salamanca, I.
Sekiguchi, Kazuhiro
Storchi-Bergmann, Thaisa
Subramaniam, A.
Villada, M.
Wagner, R.M.
Whitelock, P.A.
Winkler, H.
Clavel, J.
Dietrich, Matthias
Kollatschny, W.
Perola, G.C.
Van Winckel, H.
Van Wyk, Francois
O'Brien, P.T.
Recondo-Gonzalez, M.C.
Rodriguez-Pascual, P.M.
Santos-Lleo, M.
Abstract The Seyfert 1 galaxy NGC 3783 was intensely monitored in several bands between 1991 December and 1992 August. This paper presents the results from the ground-based observations in the optical and near-IR bands, which complement the data set formed by the International Ultraviolet Explorer (IUE) spectra, discussed elsewhere. Spectroscopic and photometric data from several observatories were combined in order to obtain well-sampled light curves of the continuum and of Hβ. During the campaign the source underwent significant variability. The light curves of the optical continuum and of Hβ display strong similarities to those obtained with the IV E. The near-IR flux did not vary significantly except for a slight increase at the end of the campaign. The cross-correlation analysis shows that the variations of the optical continuum have a lag of 1 day or Iess with respect to those of the UV continuum, with an uncertainty of ≤4 days. The integrated flux of Hβ varies with a delay of about 8 days. These results confirm that (1) the continuum variations occur simultaneously or with a very small lag across the entire UV-optical range, as in the Seyfert galaxy NGC 5548; and (2) the emission !ines of NGC 3783 respond to ionizing continuum variations with less delay than those of NGC 5548. As observed in NGC 5548, the lag of Hβ with respect to the continuum is greater than those of the high-ionization !ines.
Contido em The astrophysical journal. Chicago. Vol. 425, no. 2, pt. 1 (Apr. 1994), p. 609-621
Assunto Espectros astronômicos
Fotometria astronômica
Galáxia NGC 3783
Galaxias seyfert
Nucleo galatico
Observações astronômicas no visível
[en] Galaxies: active
[en] Galaxies: individual (NGC 3783)
[en] Galaxies: nuclei
[en] Galaxies: photometry
[en] Galaxies: seyfert
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/108847
Arquivos Descrição Formato
000220109.pdf (309.9Kb) Texto completo (inglês) Adobe PDF Visualizar/abrir

Este item está licenciado na Creative Commons License

Este item aparece na(s) seguinte(s) coleção(ões)


Mostrar registro completo

Percorrer



  • O autor é titular dos direitos autorais dos documentos disponíveis neste repositório e é vedada, nos termos da lei, a comercialização de qualquer espécie sem sua autorização prévia.
    Projeto gráfico elaborado pelo Caixola - Clube de Criação Fabico/UFRGS Powered by DSpace software, Version 1.8.1.