X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies

We investigate the excitation mechanisms of near-infrared [Fe II] and H<SUB>2</SUB> 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...

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Detalles Bibliográficos
Autores principales: Dors Junior, Oli L., Riffel, Rogemar A., Cardaci, Mónica Viviana, Hägele, Guillermo Federico, Krabbe, Angela Cristina, Pérez Montero, Enrique, Rodrigues, Irapuan
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ciencias Astronómicas
Galaxies: ISM
Galaxies: Seyfert
Infrared: galaxies
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83917
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83917
record_format dspace
spelling I19-R120-10915-839172024-06-25T17:43:23Z http://sedici.unlp.edu.ar/handle/10915/83917 X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies Dors Junior, Oli L. Riffel, Rogemar A. Cardaci, Mónica Viviana Hägele, Guillermo Federico Krabbe, Angela Cristina Pérez Montero, Enrique Rodrigues, Irapuan 2012 2019-10-23T17:57:33Z en Ciencias Astronómicas Galaxies: ISM Galaxies: Seyfert Infrared: galaxies We investigate the excitation mechanisms of near-infrared [Fe II] and H<SUB>2</SUB> 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 [Fe II]λ 1.2570μm/Paβ and H<SUB>2</SUB>λ2.1218μm/Brγ is well reproduced by our models, as are the relationships that involve the H<SUB>2</SUB> 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<SUB>2</SUB>. Facultad de Ciencias Astronómicas y Geofísicas Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 252-260
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Galaxies: ISM
Galaxies: Seyfert
Infrared: galaxies
spellingShingle Ciencias Astronómicas
Galaxies: ISM
Galaxies: Seyfert
Infrared: galaxies
Dors Junior, Oli L.
Riffel, Rogemar A.
Cardaci, Mónica Viviana
Hägele, Guillermo Federico
Krabbe, Angela Cristina
Pérez Montero, Enrique
Rodrigues, Irapuan
X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies
topic_facet Ciencias Astronómicas
Galaxies: ISM
Galaxies: Seyfert
Infrared: galaxies
description We investigate the excitation mechanisms of near-infrared [Fe II] and H<SUB>2</SUB> 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 [Fe II]λ 1.2570μm/Paβ and H<SUB>2</SUB>λ2.1218μm/Brγ is well reproduced by our models, as are the relationships that involve the H<SUB>2</SUB> 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<SUB>2</SUB>.
format Articulo
Articulo
author Dors Junior, Oli L.
Riffel, Rogemar A.
Cardaci, Mónica Viviana
Hägele, Guillermo Federico
Krabbe, Angela Cristina
Pérez Montero, Enrique
Rodrigues, Irapuan
author_facet Dors Junior, Oli L.
Riffel, Rogemar A.
Cardaci, Mónica Viviana
Hägele, Guillermo Federico
Krabbe, Angela Cristina
Pérez Montero, Enrique
Rodrigues, Irapuan
author_sort Dors Junior, Oli L.
title X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies
title_short X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies
title_full X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies
title_fullStr X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies
title_full_unstemmed X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies
title_sort x-rays as the dominant excitation mechanism of [fe ii] and h2 emission lines in active galaxies
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/83917
work_keys_str_mv AT dorsjuniorolil xraysasthedominantexcitationmechanismoffeiiandh2emissionlinesinactivegalaxies
AT riffelrogemara xraysasthedominantexcitationmechanismoffeiiandh2emissionlinesinactivegalaxies
AT cardacimonicaviviana xraysasthedominantexcitationmechanismoffeiiandh2emissionlinesinactivegalaxies
AT hageleguillermofederico xraysasthedominantexcitationmechanismoffeiiandh2emissionlinesinactivegalaxies
AT krabbeangelacristina xraysasthedominantexcitationmechanismoffeiiandh2emissionlinesinactivegalaxies
AT perezmonteroenrique xraysasthedominantexcitationmechanismoffeiiandh2emissionlinesinactivegalaxies
AT rodriguesirapuan xraysasthedominantexcitationmechanismoffeiiandh2emissionlinesinactivegalaxies
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