X-rays as the dominant excitation mechanism of [Feii] and H 2 emission lines in active galaxies
EntityUAM. Departamento de Física Teórica
PublisherOxford University Press; Royal Astronomical Society
10.1111/j.1365-2966.2012.20600.xMonthly Notices of the Royal Astronomical Society 422.1 (2012): 252-260
ISSN0035-8711 (print); 1365-2966 (online)
Funded byOLD andACKare grateful to the FAPESP for support under grant 2009/14787-7 and 2010/01490-3. MC and GH are grateful to the Spanish Ministerio de Ciencia e Innovación for support under grant AYA2010-21887-C04-03, and the Comunidad de Madrid under grant S2009/ESP-1496 (ASTROMADRID). EPM is grateful to the Spanish Ministerio de Ciencia e Innovación for support under grant AYA2010-21887-C04-02 and the Junta de Andalucía under grant TIC114
ProjectComunidad de Madrid. S2009/ESP-1496/ASTROMADRID
SubjectsGalaxies: ISM; Galaxies: Seyfert; Infrared: galaxies; Física
NoteThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2012 RAS © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Rights© 2012 RAS; © 2012 The Authors
We investigate the excitation mechanisms of near-infrared [Feii] 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 1Ryd 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 Mrk1066 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 [Feii]λ 1.2570μm/Paβ and m/Brγ 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 [Feii] and H 2
Google Scholar:Dors, Oli L. - Riffel, Rogemar A. - Cardaci, Mónica V. - Hägele, Guillermo F. - Krabbe, Ângela C. - Pérez-Montero, Enrique - Rodrigues, Irapuan
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