Interaction effects on galaxy pairs with gemini/GMOS-I: Electron density

Autores
Krabbe, A. C.; Rosa, D. A.; Dors, O. L.; Pastoriza, M. G.; Winge, C.; Hägele, Guillermo Federico; Cardaci, Mónica Viviana; Rodrigues, I.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present an observational study about the impacts of the interactions on the electron density of HII regions located in seven systems of interacting galaxies. The data consist of long-slit spectra in the range 4400-7300 Å, obtained with the Gemini Multi-Object Spectrograph at Gemini South (GMOS-S). The electron density was determined using the ratio of emission lines [S II] λ6716/λ6731. Our results indicate that the electron density estimates obtained of HII regions from our sample of interacting galaxies are systematically higher than those derived for isolated galaxies. The mean electron density values of interacting galaxies are in the range of Ne = 24-532 cm-3, while those obtained for isolated galaxies are in the range of Ne =40-137 cm-3.Comparing the observed emission lines with predictions of photoionization models, we verified that almost all the HII regions of the galaxies AM 1054A, AM 2058B and AM 2306B have emission lines excited by shock gas. For the remaining galaxies, only few H II regions have emission lines excited by shocks, such as in AM 2322B (one point) and AM 2322A (four points). No correlation is obtained between the presence of shocks and electron densities. Indeed, the highest electron density values found in our sample do not belong to the objects with gas shock excitation. We emphasize the importance of considering these quantities especially when the metallicity is derived for these types of systems.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
Materia
Ciencias Astronómicas
Galaxies:General
Galaxies:Interactions
Galaxies:ISM
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:10915/85272

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/85272
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Interaction effects on galaxy pairs with gemini/GMOS-I: Electron densityKrabbe, A. C.Rosa, D. A.Dors, O. L.Pastoriza, M. G.Winge, C.Hägele, Guillermo FedericoCardaci, Mónica VivianaRodrigues, I.Ciencias AstronómicasGalaxies:GeneralGalaxies:InteractionsGalaxies:ISMWe present an observational study about the impacts of the interactions on the electron density of HII regions located in seven systems of interacting galaxies. The data consist of long-slit spectra in the range 4400-7300 Å, obtained with the Gemini Multi-Object Spectrograph at Gemini South (GMOS-S). The electron density was determined using the ratio of emission lines [S II] λ6716/λ6731. Our results indicate that the electron density estimates obtained of HII regions from our sample of interacting galaxies are systematically higher than those derived for isolated galaxies. The mean electron density values of interacting galaxies are in the range of N<SUB>e</SUB> = 24-532 cm<SUP>-3</SUP>, while those obtained for isolated galaxies are in the range of N<SUB>e</SUB> =40-137 cm<SUP>-3</SUP>.Comparing the observed emission lines with predictions of photoionization models, we verified that almost all the HII regions of the galaxies AM 1054A, AM 2058B and AM 2306B have emission lines excited by shock gas. For the remaining galaxies, only few H II regions have emission lines excited by shocks, such as in AM 2322B (one point) and AM 2322A (four points). No correlation is obtained between the presence of shocks and electron densities. Indeed, the highest electron density values found in our sample do not belong to the objects with gas shock excitation. We emphasize the importance of considering these quantities especially when the metallicity is derived for these types of systems.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1155-1170http://sedici.unlp.edu.ar/handle/10915/85272enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stt1913info:eu-repo/semantics/reference/hdl/10915/127166info:eu-repo/semantics/reference/hdl/10915/125245info: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:UNLP2025-09-29T11:16:29Zoai:sedici.unlp.edu.ar:10915/85272Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:30.12SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Interaction effects on galaxy pairs with gemini/GMOS-I: Electron density
title Interaction effects on galaxy pairs with gemini/GMOS-I: Electron density
spellingShingle Interaction effects on galaxy pairs with gemini/GMOS-I: Electron density
Krabbe, A. C.
Ciencias Astronómicas
Galaxies:General
Galaxies:Interactions
Galaxies:ISM
title_short Interaction effects on galaxy pairs with gemini/GMOS-I: Electron density
title_full Interaction effects on galaxy pairs with gemini/GMOS-I: Electron density
title_fullStr Interaction effects on galaxy pairs with gemini/GMOS-I: Electron density
title_full_unstemmed Interaction effects on galaxy pairs with gemini/GMOS-I: Electron density
title_sort Interaction effects on galaxy pairs with gemini/GMOS-I: Electron density
dc.creator.none.fl_str_mv Krabbe, A. C.
Rosa, D. A.
Dors, O. L.
Pastoriza, M. G.
Winge, C.
Hägele, Guillermo Federico
Cardaci, Mónica Viviana
Rodrigues, I.
author Krabbe, A. C.
author_facet Krabbe, A. C.
Rosa, D. A.
Dors, O. L.
Pastoriza, M. G.
Winge, C.
Hägele, Guillermo Federico
Cardaci, Mónica Viviana
Rodrigues, I.
author_role author
author2 Rosa, D. A.
Dors, O. L.
Pastoriza, M. G.
Winge, C.
Hägele, Guillermo Federico
Cardaci, Mónica Viviana
Rodrigues, I.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Galaxies:General
Galaxies:Interactions
Galaxies:ISM
topic Ciencias Astronómicas
Galaxies:General
Galaxies:Interactions
Galaxies:ISM
dc.description.none.fl_txt_mv We present an observational study about the impacts of the interactions on the electron density of HII regions located in seven systems of interacting galaxies. The data consist of long-slit spectra in the range 4400-7300 Å, obtained with the Gemini Multi-Object Spectrograph at Gemini South (GMOS-S). The electron density was determined using the ratio of emission lines [S II] λ6716/λ6731. Our results indicate that the electron density estimates obtained of HII regions from our sample of interacting galaxies are systematically higher than those derived for isolated galaxies. The mean electron density values of interacting galaxies are in the range of N<SUB>e</SUB> = 24-532 cm<SUP>-3</SUP>, while those obtained for isolated galaxies are in the range of N<SUB>e</SUB> =40-137 cm<SUP>-3</SUP>.Comparing the observed emission lines with predictions of photoionization models, we verified that almost all the HII regions of the galaxies AM 1054A, AM 2058B and AM 2306B have emission lines excited by shock gas. For the remaining galaxies, only few H II regions have emission lines excited by shocks, such as in AM 2322B (one point) and AM 2322A (four points). No correlation is obtained between the presence of shocks and electron densities. Indeed, the highest electron density values found in our sample do not belong to the objects with gas shock excitation. We emphasize the importance of considering these quantities especially when the metallicity is derived for these types of systems.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
description We present an observational study about the impacts of the interactions on the electron density of HII regions located in seven systems of interacting galaxies. The data consist of long-slit spectra in the range 4400-7300 Å, obtained with the Gemini Multi-Object Spectrograph at Gemini South (GMOS-S). The electron density was determined using the ratio of emission lines [S II] λ6716/λ6731. Our results indicate that the electron density estimates obtained of HII regions from our sample of interacting galaxies are systematically higher than those derived for isolated galaxies. The mean electron density values of interacting galaxies are in the range of N<SUB>e</SUB> = 24-532 cm<SUP>-3</SUP>, while those obtained for isolated galaxies are in the range of N<SUB>e</SUB> =40-137 cm<SUP>-3</SUP>.Comparing the observed emission lines with predictions of photoionization models, we verified that almost all the HII regions of the galaxies AM 1054A, AM 2058B and AM 2306B have emission lines excited by shock gas. For the remaining galaxies, only few H II regions have emission lines excited by shocks, such as in AM 2322B (one point) and AM 2322A (four points). No correlation is obtained between the presence of shocks and electron densities. Indeed, the highest electron density values found in our sample do not belong to the objects with gas shock excitation. We emphasize the importance of considering these quantities especially when the metallicity is derived for these types of systems.
publishDate 2013
dc.date.none.fl_str_mv 2013
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/10915/85272
url http://sedici.unlp.edu.ar/handle/10915/85272
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/10.1093/mnras/stt1913
info:eu-repo/semantics/reference/hdl/10915/127166
info:eu-repo/semantics/reference/hdl/10915/125245
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
1155-1170
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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
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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