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
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/124566
Ver los metadatos del registro completo
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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) |
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openAccess |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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