| Texto completo | |
| Autor(es): |
Dors, Jr., Oli L.
[1]
;
Riffel, Rogemar A.
[2]
;
Cardaci, Monica V.
[3, 4]
;
Haegele, Guillermo F.
[3, 4]
;
Krabbe, Angela C.
[1]
;
Perez-Montero, Enrique
[5]
;
Rodrigues, Irapuan
[1]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] Univ Vale Paraiba, BR-12244000 Sao Jose Dos Campos, SP - Brazil
[2] Univ Fed Santa Maria, BR-97105900 Santa Maria, RS - Brazil
[3] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid - Spain
[4] Univ Nacl La Plata, Fac Ciencias Astron & Geofis, RA-1900 La Plata - Argentina
[5] Inst Astrofis Andalucia CSIC, Granada 18080 - Spain
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Monthly Notices of the Royal Astronomical Society; v. 422, n. 1, p. 252-260, MAY 2012. |
| Citações Web of Science: | 18 |
| Resumo | |
We investigate the excitation mechanisms of near-infrared {[}Fe II] and H-2 emission lines observed in active galactic nuclei (AGNs). We built a photoionization model grid considering a two-component continuum: one component accounts for the `big bump' component peaking at 1 Ryd and another represents the X-ray source that dominates the continuum emission at high energies. Photoionization models considering as ionizing source a spectral energy distribution obtained from photometric data of Seyert 2 Mrk 1066 taken from the literature were considered. Results of these models were compared with a large sample of observational long-slit and Integral field Unit (IFU) spectroscopy data of the nuclear region for a sample of active objects. We found that the correlation between the observational {[}Fe II]lambda 1.2570 mu m/Pa beta and H-2 lambda 2.1218 mu m/Br gamma is well reproduced by our models, as are the relationships that involve the H-2 emission-line ratios observed in the spectroscopic data. We conclude that heating by X-rays produced by active nuclei can be considered a common and very important mechanism of excitation of {[}Fe II] and H-2. (AU) | |
| Processo FAPESP: | 10/01490-3 - Galáxias em interação: efeitos na população estelar e nas propriedades físicas do gás ionizado |
| Beneficiário: | Angela Cristina Krabbe |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |
| Processo FAPESP: | 09/14787-7 - Propriedades físicas de regiões de formação estelar em anéis circumnucleares e em (U)LIRGs |
| Beneficiário: | Oli Luiz Dors Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |