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

Autores
Dors Junior, Oli L.; Riffel, Rogemar A.; Cardaci, Mónica Viviana; Hägele, Guillermo Federico; Krabbe, Angela Cristina; Pérez Montero, Enrique; Rodrigues, Irapuan
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We investigate the excitation mechanisms of near-infrared [Fe II] and H2 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 H2λ2.1218μm/Brγ is well reproduced by our models, as are the relationships that involve the H2 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 H2.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Galaxies: ISM
Galaxies: Seyfert
Infrared: galaxies
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/83917
Acceder
id SEDICI_b3849609d0798f013703f55f15fb9d50
oai_identifier_str oai:sedici.unlp.edu.ar:10915/83917
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxiesDors Junior, Oli L.Riffel, Rogemar A.Cardaci, Mónica VivianaHägele, Guillermo FedericoKrabbe, Angela CristinaPérez Montero, EnriqueRodrigues, IrapuanCiencias AstronómicasGalaxies: ISMGalaxies: SeyfertInfrared: galaxiesWe 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 Geofísicas2012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf252-260http://sedici.unlp.edu.ar/handle/10915/83917enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2012.20600.xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:05Zoai:sedici.unlp.edu.ar:10915/83917Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:05.407SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies
title X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies
spellingShingle X-rays as the dominant excitation mechanism of [Fe II] and H2 emission lines in active galaxies
Dors Junior, Oli L.
Ciencias Astronómicas
Galaxies: ISM
Galaxies: Seyfert
Infrared: 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
dc.creator.none.fl_str_mv Dors Junior, Oli L.
Riffel, Rogemar A.
Cardaci, Mónica Viviana
Hägele, Guillermo Federico
Krabbe, Angela Cristina
Pérez Montero, Enrique
Rodrigues, Irapuan
author Dors Junior, Oli L.
author_facet Dors Junior, Oli L.
Riffel, Rogemar A.
Cardaci, Mónica Viviana
Hägele, Guillermo Federico
Krabbe, Angela Cristina
Pérez Montero, Enrique
Rodrigues, Irapuan
author_role author
author2 Riffel, Rogemar A.
Cardaci, Mónica Viviana
Hägele, Guillermo Federico
Krabbe, Angela Cristina
Pérez Montero, Enrique
Rodrigues, Irapuan
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Galaxies: ISM
Galaxies: Seyfert
Infrared: galaxies
topic Ciencias Astronómicas
Galaxies: ISM
Galaxies: Seyfert
Infrared: galaxies
dc.description.none.fl_txt_mv 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
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>.
publishDate 2012
dc.date.none.fl_str_mv 2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/83917
url http://sedici.unlp.edu.ar/handle/10915/83917
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0035-8711
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2012.20600.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
252-260
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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