Integral field spectroscopy of H II regions in M33
- Autores
- López-Hernández, Jesus; Terlevich, Elena; Terlevich, Roberto; Rosa González, Daniel; Díaz, Ángeles; García Benito, Rubén; Vílchez, José; Hägele, Guillermo Federico
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Integral field spectroscopy is presented for star-forming regions in M33. A central area of 300 × 500 pc2 and the external H . II region IC 132, at a galactocentric distance ~19 arcmin (4.69 kpc), were observed with the Potsdam Multi-Aperture Spectrophotometer instrument at the 3.5-m telescope of the Centro Astronómico Hispano-Alemán (CAHA, aka Calar Alto Observatory). The spectral coverage goes from 3600 Å to 1 μm to include from [O . II] λ3727 Å to the near-infrared lines required for deriving sulphur electron temperature and abundance diagnostics.Local conditions within individual H . ii regions are presented in the form of emission-line fluxes and physical conditions for each spatial resolution element (spaxel) and for segments with similar Hα surface brightness.A clear dichotomy is observed when comparing the central to outer disc H . II regions. While the external H . II region has higher electron temperature plus larger Hβ equivalent width, size and excitation, the central region has higher extinction and metal content.The dichotomy extends to the Baldwin-Phillips-Terlevich (BPT) diagnostic diagrams that show two orthogonal broad distributions of points. By comparing with pseudo-3D photoionization models, we conclude that the bulk of observed differences are probably related to a different ionization parameter and metallicity.Wolf-Rayet (WR) features are detected in IC 132, and resolved into two concentrations whose integrated spectra were used to estimate the characteristic number of WR stars. No WR features were detected in the central H . II regions despite their higher metallicity.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
Galaxies: individual: M33
H II regions
ISM: abundances - 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:10915/85480
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Integral field spectroscopy of H II regions in M33López-Hernández, JesusTerlevich, ElenaTerlevich, RobertoRosa González, DanielDíaz, ÁngelesGarcía Benito, RubénVílchez, JoséHägele, Guillermo FedericoCiencias AstronómicasGalaxies: individual: M33H II regionsISM: abundancesIntegral field spectroscopy is presented for star-forming regions in M33. A central area of 300 × 500 pc<sup>2</sup> and the external H . II region IC 132, at a galactocentric distance ~19 arcmin (4.69 kpc), were observed with the Potsdam Multi-Aperture Spectrophotometer instrument at the 3.5-m telescope of the Centro Astronómico Hispano-Alemán (CAHA, aka Calar Alto Observatory). The spectral coverage goes from 3600 Å to 1 μm to include from [O . II] λ3727 Å to the near-infrared lines required for deriving sulphur electron temperature and abundance diagnostics.Local conditions within individual H . ii regions are presented in the form of emission-line fluxes and physical conditions for each spatial resolution element (spaxel) and for segments with similar Hα surface brightness.A clear dichotomy is observed when comparing the central to outer disc H . II regions. While the external H . II region has higher electron temperature plus larger Hβ equivalent width, size and excitation, the central region has higher extinction and metal content.The dichotomy extends to the Baldwin-Phillips-Terlevich (BPT) diagnostic diagrams that show two orthogonal broad distributions of points. By comparing with pseudo-3D photoionization models, we conclude that the bulk of observed differences are probably related to a different ionization parameter and metallicity.Wolf-Rayet (WR) features are detected in IC 132, and resolved into two concentrations whose integrated spectra were used to estimate the characteristic number of WR stars. No WR features were detected in the central H . II regions despite their higher metallicity.Facultad de Ciencias Astronómicas y Geofísicas2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf472-508http://sedici.unlp.edu.ar/handle/10915/85480enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sts658info: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:UNLP2025-09-29T11:16:30Zoai:sedici.unlp.edu.ar:10915/85480Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:31.031SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Integral field spectroscopy of H II regions in M33 |
title |
Integral field spectroscopy of H II regions in M33 |
spellingShingle |
Integral field spectroscopy of H II regions in M33 López-Hernández, Jesus Ciencias Astronómicas Galaxies: individual: M33 H II regions ISM: abundances |
title_short |
Integral field spectroscopy of H II regions in M33 |
title_full |
Integral field spectroscopy of H II regions in M33 |
title_fullStr |
Integral field spectroscopy of H II regions in M33 |
title_full_unstemmed |
Integral field spectroscopy of H II regions in M33 |
title_sort |
Integral field spectroscopy of H II regions in M33 |
dc.creator.none.fl_str_mv |
López-Hernández, Jesus Terlevich, Elena Terlevich, Roberto Rosa González, Daniel Díaz, Ángeles García Benito, Rubén Vílchez, José Hägele, Guillermo Federico |
author |
López-Hernández, Jesus |
author_facet |
López-Hernández, Jesus Terlevich, Elena Terlevich, Roberto Rosa González, Daniel Díaz, Ángeles García Benito, Rubén Vílchez, José Hägele, Guillermo Federico |
author_role |
author |
author2 |
Terlevich, Elena Terlevich, Roberto Rosa González, Daniel Díaz, Ángeles García Benito, Rubén Vílchez, José Hägele, Guillermo Federico |
author2_role |
author author author author author author author |
dc.subject.none.fl_str_mv |
Ciencias Astronómicas Galaxies: individual: M33 H II regions ISM: abundances |
topic |
Ciencias Astronómicas Galaxies: individual: M33 H II regions ISM: abundances |
dc.description.none.fl_txt_mv |
Integral field spectroscopy is presented for star-forming regions in M33. A central area of 300 × 500 pc<sup>2</sup> and the external H . II region IC 132, at a galactocentric distance ~19 arcmin (4.69 kpc), were observed with the Potsdam Multi-Aperture Spectrophotometer instrument at the 3.5-m telescope of the Centro Astronómico Hispano-Alemán (CAHA, aka Calar Alto Observatory). The spectral coverage goes from 3600 Å to 1 μm to include from [O . II] λ3727 Å to the near-infrared lines required for deriving sulphur electron temperature and abundance diagnostics.Local conditions within individual H . ii regions are presented in the form of emission-line fluxes and physical conditions for each spatial resolution element (spaxel) and for segments with similar Hα surface brightness.A clear dichotomy is observed when comparing the central to outer disc H . II regions. While the external H . II region has higher electron temperature plus larger Hβ equivalent width, size and excitation, the central region has higher extinction and metal content.The dichotomy extends to the Baldwin-Phillips-Terlevich (BPT) diagnostic diagrams that show two orthogonal broad distributions of points. By comparing with pseudo-3D photoionization models, we conclude that the bulk of observed differences are probably related to a different ionization parameter and metallicity.Wolf-Rayet (WR) features are detected in IC 132, and resolved into two concentrations whose integrated spectra were used to estimate the characteristic number of WR stars. No WR features were detected in the central H . II regions despite their higher metallicity. Facultad de Ciencias Astronómicas y Geofísicas |
description |
Integral field spectroscopy is presented for star-forming regions in M33. A central area of 300 × 500 pc<sup>2</sup> and the external H . II region IC 132, at a galactocentric distance ~19 arcmin (4.69 kpc), were observed with the Potsdam Multi-Aperture Spectrophotometer instrument at the 3.5-m telescope of the Centro Astronómico Hispano-Alemán (CAHA, aka Calar Alto Observatory). The spectral coverage goes from 3600 Å to 1 μm to include from [O . II] λ3727 Å to the near-infrared lines required for deriving sulphur electron temperature and abundance diagnostics.Local conditions within individual H . ii regions are presented in the form of emission-line fluxes and physical conditions for each spatial resolution element (spaxel) and for segments with similar Hα surface brightness.A clear dichotomy is observed when comparing the central to outer disc H . II regions. While the external H . II region has higher electron temperature plus larger Hβ equivalent width, size and excitation, the central region has higher extinction and metal content.The dichotomy extends to the Baldwin-Phillips-Terlevich (BPT) diagnostic diagrams that show two orthogonal broad distributions of points. By comparing with pseudo-3D photoionization models, we conclude that the bulk of observed differences are probably related to a different ionization parameter and metallicity.Wolf-Rayet (WR) features are detected in IC 132, and resolved into two concentrations whose integrated spectra were used to estimate the characteristic number of WR stars. No WR features were detected in the central H . II regions despite their higher metallicity. |
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/10915/85480 |
url |
http://sedici.unlp.edu.ar/handle/10915/85480 |
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/sts658 |
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 472-508 |
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