| Full text | |
| Author(s): |
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]
Total Authors: 7
|
| Affiliation: | [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
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 422, n. 1, p. 252-260, MAY 2012. |
| Web of Science Citations: | 18 |
| Abstract | |
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) | |
| FAPESP's process: | 10/01490-3 - Interacting galaxies: effects in the stellar population and the physical properties of the ionized gas |
| Grantee: | Angela Cristina Krabbe |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 09/14787-7 - Physical properties of star formation regions in circumnuclear rings and in (U)LIRGs |
| Grantee: | Oli Luiz Dors Junior |
| Support Opportunities: | Research Grants - Young Investigators Grants |