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
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/85480

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network_name_str SEDICI (UNLP)
spelling 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
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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