Effective temperature of ionizing stars in extragalactic H II regions : II. Nebular parameter relationships based on CALIFA data

Autores
Zinchenko, Igor A.; Dors, Oli L.; Hägele, Guillermo Federico; Cardaci, Mónica Viviana; Krabbe, Angela
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We calculate the effective temperature (Teff) of ionizing star(s), the oxygen abundance of the gas phase (O/H)⁠, and the ionization parameter U for a sample of H II regions located in the discs of 59 spiral galaxies in the redshift range 0.005 < z < 0.03. We use spectroscopic data taken from the CALIFA data release 3 (DR3) and theoretical (for Teff and U) and empirical (for O/H) calibrations based on strong emission lines. We consider the spatial distribution and radial gradients of these parameters in each galactic disc for the objects in our sample. Most of the galaxies in our sample (∼70 per cent) show positive Teff radial gradients, although some exhibit negative or flat ones. The median value of the Teff radial gradient is 0.762 kK/R25. We find that the radial gradients of both log U and Teff depend on the oxygen abundance gradient, in the sense that the gradient of log U increases as the log(O/H) gradient increases while there is an anti-correlation between the gradient of Teff and the oxygen abundance gradient. Moreover, galaxies with flat oxygen abundance gradients tend to have flat log U and Teff gradients as well. Although our results are in agreement with the idea of the existence of positive Teff gradients along the disc of the majority of spiral galaxies, it seems that this is not a universal property for these objects.
Instituto de Astrofísica de La Plata
Materia
Ciencias Astronómicas
Física
galaxies: abundances
ISM: abundances
H II regions
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:10915/124566

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network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Effective temperature of ionizing stars in extragalactic H II regions : II. Nebular parameter relationships based on CALIFA dataZinchenko, Igor A.Dors, Oli L.Hägele, Guillermo FedericoCardaci, Mónica VivianaKrabbe, AngelaCiencias AstronómicasFísicagalaxies: abundancesISM: abundancesH II regionsWe calculate the effective temperature (T<sub>eff</sub>) of ionizing star(s), the oxygen abundance of the gas phase (O/H)⁠, and the ionization parameter U for a sample of H II regions located in the discs of 59 spiral galaxies in the redshift range 0.005 < z < 0.03. We use spectroscopic data taken from the CALIFA data release 3 (DR3) and theoretical (for T<sub>eff</sub> and U) and empirical (for O/H) calibrations based on strong emission lines. We consider the spatial distribution and radial gradients of these parameters in each galactic disc for the objects in our sample. Most of the galaxies in our sample (∼70 per cent) show positive T<sub>eff</sub> radial gradients, although some exhibit negative or flat ones. The median value of the T<sub>eff</sub> radial gradient is 0.762 kK/R25. We find that the radial gradients of both log U and T<sub>eff</sub> depend on the oxygen abundance gradient, in the sense that the gradient of log U increases as the log(O/H) gradient increases while there is an anti-correlation between the gradient of T<sub>eff</sub> and the oxygen abundance gradient. Moreover, galaxies with flat oxygen abundance gradients tend to have flat log U and T<sub>eff</sub> gradients as well. Although our results are in agreement with the idea of the existence of positive T<sub>eff</sub> gradients along the disc of the majority of spiral galaxies, it seems that this is not a universal property for these objects.Instituto de Astrofísica de La Plata2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1901-1911http://sedici.unlp.edu.ar/handle/10915/124566enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/issn/1365-2966info:eu-repo/semantics/altIdentifier/arxiv/1810.09018info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty3026info: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:UNLP2025-09-29T11:29:54Zoai:sedici.unlp.edu.ar:10915/124566Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:29:54.524SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Effective temperature of ionizing stars in extragalactic H II regions : II. Nebular parameter relationships based on CALIFA data
title Effective temperature of ionizing stars in extragalactic H II regions : II. Nebular parameter relationships based on CALIFA data
spellingShingle Effective temperature of ionizing stars in extragalactic H II regions : II. Nebular parameter relationships based on CALIFA data
Zinchenko, Igor A.
Ciencias Astronómicas
Física
galaxies: abundances
ISM: abundances
H II regions
title_short Effective temperature of ionizing stars in extragalactic H II regions : II. Nebular parameter relationships based on CALIFA data
title_full Effective temperature of ionizing stars in extragalactic H II regions : II. Nebular parameter relationships based on CALIFA data
title_fullStr Effective temperature of ionizing stars in extragalactic H II regions : II. Nebular parameter relationships based on CALIFA data
title_full_unstemmed Effective temperature of ionizing stars in extragalactic H II regions : II. Nebular parameter relationships based on CALIFA data
title_sort Effective temperature of ionizing stars in extragalactic H II regions : II. Nebular parameter relationships based on CALIFA data
dc.creator.none.fl_str_mv Zinchenko, Igor A.
Dors, Oli L.
Hägele, Guillermo Federico
Cardaci, Mónica Viviana
Krabbe, Angela
author Zinchenko, Igor A.
author_facet Zinchenko, Igor A.
Dors, Oli L.
Hägele, Guillermo Federico
Cardaci, Mónica Viviana
Krabbe, Angela
author_role author
author2 Dors, Oli L.
Hägele, Guillermo Federico
Cardaci, Mónica Viviana
Krabbe, Angela
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Física
galaxies: abundances
ISM: abundances
H II regions
topic Ciencias Astronómicas
Física
galaxies: abundances
ISM: abundances
H II regions
dc.description.none.fl_txt_mv We calculate the effective temperature (T<sub>eff</sub>) of ionizing star(s), the oxygen abundance of the gas phase (O/H)⁠, and the ionization parameter U for a sample of H II regions located in the discs of 59 spiral galaxies in the redshift range 0.005 < z < 0.03. We use spectroscopic data taken from the CALIFA data release 3 (DR3) and theoretical (for T<sub>eff</sub> and U) and empirical (for O/H) calibrations based on strong emission lines. We consider the spatial distribution and radial gradients of these parameters in each galactic disc for the objects in our sample. Most of the galaxies in our sample (∼70 per cent) show positive T<sub>eff</sub> radial gradients, although some exhibit negative or flat ones. The median value of the T<sub>eff</sub> radial gradient is 0.762 kK/R25. We find that the radial gradients of both log U and T<sub>eff</sub> depend on the oxygen abundance gradient, in the sense that the gradient of log U increases as the log(O/H) gradient increases while there is an anti-correlation between the gradient of T<sub>eff</sub> and the oxygen abundance gradient. Moreover, galaxies with flat oxygen abundance gradients tend to have flat log U and T<sub>eff</sub> gradients as well. Although our results are in agreement with the idea of the existence of positive T<sub>eff</sub> gradients along the disc of the majority of spiral galaxies, it seems that this is not a universal property for these objects.
Instituto de Astrofísica de La Plata
description We calculate the effective temperature (T<sub>eff</sub>) of ionizing star(s), the oxygen abundance of the gas phase (O/H)⁠, and the ionization parameter U for a sample of H II regions located in the discs of 59 spiral galaxies in the redshift range 0.005 < z < 0.03. We use spectroscopic data taken from the CALIFA data release 3 (DR3) and theoretical (for T<sub>eff</sub> and U) and empirical (for O/H) calibrations based on strong emission lines. We consider the spatial distribution and radial gradients of these parameters in each galactic disc for the objects in our sample. Most of the galaxies in our sample (∼70 per cent) show positive T<sub>eff</sub> radial gradients, although some exhibit negative or flat ones. The median value of the T<sub>eff</sub> radial gradient is 0.762 kK/R25. We find that the radial gradients of both log U and T<sub>eff</sub> depend on the oxygen abundance gradient, in the sense that the gradient of log U increases as the log(O/H) gradient increases while there is an anti-correlation between the gradient of T<sub>eff</sub> and the oxygen abundance gradient. Moreover, galaxies with flat oxygen abundance gradients tend to have flat log U and T<sub>eff</sub> gradients as well. Although our results are in agreement with the idea of the existence of positive T<sub>eff</sub> gradients along the disc of the majority of spiral galaxies, it seems that this is not a universal property for these objects.
publishDate 2018
dc.date.none.fl_str_mv 2018
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/10915/124566
url http://sedici.unlp.edu.ar/handle/10915/124566
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/issn/1365-2966
info:eu-repo/semantics/altIdentifier/arxiv/1810.09018
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty3026
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
1901-1911
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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