A multifrequency study of the active star-forming complex NGC6357 - I. Interstellar structures linked to the open cluster Pis24
- Autores
- Cappa, Cristina Elisabet; Barbá, Rodolfo Héctor; Duronea, Nicolás Urbano; Vasquez, Javier; Arnal, Edmundo Marcelo; Goss, W. M.; Fernández Lajús, Eduardo
- Año de publicación
- 2011
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We investigate the distribution of gas (ionized, neutral atomic and molecular) and interstellar dust in the complex star-forming region NGC6357 with the goal of studying the interplay between the massive stars in the open cluster Pis24 and the surrounding interstellar matter. Our study of the distribution of the ionized gas is based on narrow-band Hα, [S II]and [O III] images obtained with the Curtis-Schmidt Camera at CTIO, Chile, and on radio continuum observations at 1465 MHz taken with the VLA with a synthesized beam of 40arcsec. The distribution of the molecular gas is analysed using 12CO(1-0) data obtained with the NANTEN radiotelescope, Chile (angular resolution = 2.7arcmin). The interstellar dust distribution was studied using mid-infrared data from the GLIMPSE survey and far-infrared observations from IRAS. NGC6357 consists of a large ionized shell and a number of smaller optical nebulosities. The optical, radio continuum, and near- and mid-IR images delineate the distributions of the ionized gas and interstellar dust in the H II regions and in previously unknown wind-blown bubbles linked to the massive stars in Pis24 revealing surrounding photodissociation regions. The CO line observations allowed us to identify the molecular counterparts of the ionized structures in the complex and to confirm the presence of photodissociation regions. The action of the WR star HD157504 on the surrounding gas was also investigated. The molecular mass in the complex is estimated to be (4 ± 2) × 105 M⊙. The mean electron densities derived from the radio data suggest electron densities >200 cm-3, indicating that NGC6357 is a complex formed in a region of high ambient density. The known massive stars in Pis24 and a number of newly inferred massive stars are mainly responsible for the excitation and photodissociation of the parental molecular cloud.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
Instituto Argentino de Radioastronomía - Materia
-
Ciencias Astronómicas
H II regions
ISM: bubbles
ISM: individual objects: NGC6357
Open clusters and associations: individual: Pis24 - 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:10915/83961
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A multifrequency study of the active star-forming complex NGC6357 - I. Interstellar structures linked to the open cluster Pis24Cappa, Cristina ElisabetBarbá, Rodolfo HéctorDuronea, Nicolás UrbanoVasquez, JavierArnal, Edmundo MarceloGoss, W. M.Fernández Lajús, EduardoCiencias AstronómicasH II regionsISM: bubblesISM: individual objects: NGC6357Open clusters and associations: individual: Pis24We investigate the distribution of gas (ionized, neutral atomic and molecular) and interstellar dust in the complex star-forming region NGC6357 with the goal of studying the interplay between the massive stars in the open cluster Pis24 and the surrounding interstellar matter. Our study of the distribution of the ionized gas is based on narrow-band Hα, [S II]and [O III] images obtained with the Curtis-Schmidt Camera at CTIO, Chile, and on radio continuum observations at 1465 MHz taken with the VLA with a synthesized beam of 40arcsec. The distribution of the molecular gas is analysed using <SUP>12</SUP>CO(1-0) data obtained with the NANTEN radiotelescope, Chile (angular resolution = 2.7arcmin). The interstellar dust distribution was studied using mid-infrared data from the GLIMPSE survey and far-infrared observations from <i>IRAS</i>. NGC6357 consists of a large ionized shell and a number of smaller optical nebulosities. The optical, radio continuum, and near- and mid-IR images delineate the distributions of the ionized gas and interstellar dust in the H II regions and in previously unknown wind-blown bubbles linked to the massive stars in Pis24 revealing surrounding photodissociation regions. The CO line observations allowed us to identify the molecular counterparts of the ionized structures in the complex and to confirm the presence of photodissociation regions. The action of the WR star HD157504 on the surrounding gas was also investigated. The molecular mass in the complex is estimated to be (4 ± 2) × 10<SUP>5</SUP> M⊙. The mean electron densities derived from the radio data suggest electron densities >200 cm<SUP>-3</SUP>, indicating that NGC6357 is a complex formed in a region of high ambient density. The known massive stars in Pis24 and a number of newly inferred massive stars are mainly responsible for the excitation and photodissociation of the parental molecular cloud.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La PlataInstituto Argentino de Radioastronomía2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf2844-2858http://sedici.unlp.edu.ar/handle/10915/83961enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2011.18902.xinfo: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:UNLP2025-09-29T11:16:06Zoai:sedici.unlp.edu.ar:10915/83961Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:06.501SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
A multifrequency study of the active star-forming complex NGC6357 - I. Interstellar structures linked to the open cluster Pis24 |
title |
A multifrequency study of the active star-forming complex NGC6357 - I. Interstellar structures linked to the open cluster Pis24 |
spellingShingle |
A multifrequency study of the active star-forming complex NGC6357 - I. Interstellar structures linked to the open cluster Pis24 Cappa, Cristina Elisabet Ciencias Astronómicas H II regions ISM: bubbles ISM: individual objects: NGC6357 Open clusters and associations: individual: Pis24 |
title_short |
A multifrequency study of the active star-forming complex NGC6357 - I. Interstellar structures linked to the open cluster Pis24 |
title_full |
A multifrequency study of the active star-forming complex NGC6357 - I. Interstellar structures linked to the open cluster Pis24 |
title_fullStr |
A multifrequency study of the active star-forming complex NGC6357 - I. Interstellar structures linked to the open cluster Pis24 |
title_full_unstemmed |
A multifrequency study of the active star-forming complex NGC6357 - I. Interstellar structures linked to the open cluster Pis24 |
title_sort |
A multifrequency study of the active star-forming complex NGC6357 - I. Interstellar structures linked to the open cluster Pis24 |
dc.creator.none.fl_str_mv |
Cappa, Cristina Elisabet Barbá, Rodolfo Héctor Duronea, Nicolás Urbano Vasquez, Javier Arnal, Edmundo Marcelo Goss, W. M. Fernández Lajús, Eduardo |
author |
Cappa, Cristina Elisabet |
author_facet |
Cappa, Cristina Elisabet Barbá, Rodolfo Héctor Duronea, Nicolás Urbano Vasquez, Javier Arnal, Edmundo Marcelo Goss, W. M. Fernández Lajús, Eduardo |
author_role |
author |
author2 |
Barbá, Rodolfo Héctor Duronea, Nicolás Urbano Vasquez, Javier Arnal, Edmundo Marcelo Goss, W. M. Fernández Lajús, Eduardo |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
Ciencias Astronómicas H II regions ISM: bubbles ISM: individual objects: NGC6357 Open clusters and associations: individual: Pis24 |
topic |
Ciencias Astronómicas H II regions ISM: bubbles ISM: individual objects: NGC6357 Open clusters and associations: individual: Pis24 |
dc.description.none.fl_txt_mv |
We investigate the distribution of gas (ionized, neutral atomic and molecular) and interstellar dust in the complex star-forming region NGC6357 with the goal of studying the interplay between the massive stars in the open cluster Pis24 and the surrounding interstellar matter. Our study of the distribution of the ionized gas is based on narrow-band Hα, [S II]and [O III] images obtained with the Curtis-Schmidt Camera at CTIO, Chile, and on radio continuum observations at 1465 MHz taken with the VLA with a synthesized beam of 40arcsec. The distribution of the molecular gas is analysed using <SUP>12</SUP>CO(1-0) data obtained with the NANTEN radiotelescope, Chile (angular resolution = 2.7arcmin). The interstellar dust distribution was studied using mid-infrared data from the GLIMPSE survey and far-infrared observations from <i>IRAS</i>. NGC6357 consists of a large ionized shell and a number of smaller optical nebulosities. The optical, radio continuum, and near- and mid-IR images delineate the distributions of the ionized gas and interstellar dust in the H II regions and in previously unknown wind-blown bubbles linked to the massive stars in Pis24 revealing surrounding photodissociation regions. The CO line observations allowed us to identify the molecular counterparts of the ionized structures in the complex and to confirm the presence of photodissociation regions. The action of the WR star HD157504 on the surrounding gas was also investigated. The molecular mass in the complex is estimated to be (4 ± 2) × 10<SUP>5</SUP> M⊙. The mean electron densities derived from the radio data suggest electron densities >200 cm<SUP>-3</SUP>, indicating that NGC6357 is a complex formed in a region of high ambient density. The known massive stars in Pis24 and a number of newly inferred massive stars are mainly responsible for the excitation and photodissociation of the parental molecular cloud. Facultad de Ciencias Astronómicas y Geofísicas Instituto de Astrofísica de La Plata Instituto Argentino de Radioastronomía |
description |
We investigate the distribution of gas (ionized, neutral atomic and molecular) and interstellar dust in the complex star-forming region NGC6357 with the goal of studying the interplay between the massive stars in the open cluster Pis24 and the surrounding interstellar matter. Our study of the distribution of the ionized gas is based on narrow-band Hα, [S II]and [O III] images obtained with the Curtis-Schmidt Camera at CTIO, Chile, and on radio continuum observations at 1465 MHz taken with the VLA with a synthesized beam of 40arcsec. The distribution of the molecular gas is analysed using <SUP>12</SUP>CO(1-0) data obtained with the NANTEN radiotelescope, Chile (angular resolution = 2.7arcmin). The interstellar dust distribution was studied using mid-infrared data from the GLIMPSE survey and far-infrared observations from <i>IRAS</i>. NGC6357 consists of a large ionized shell and a number of smaller optical nebulosities. The optical, radio continuum, and near- and mid-IR images delineate the distributions of the ionized gas and interstellar dust in the H II regions and in previously unknown wind-blown bubbles linked to the massive stars in Pis24 revealing surrounding photodissociation regions. The CO line observations allowed us to identify the molecular counterparts of the ionized structures in the complex and to confirm the presence of photodissociation regions. The action of the WR star HD157504 on the surrounding gas was also investigated. The molecular mass in the complex is estimated to be (4 ± 2) × 10<SUP>5</SUP> M⊙. The mean electron densities derived from the radio data suggest electron densities >200 cm<SUP>-3</SUP>, indicating that NGC6357 is a complex formed in a region of high ambient density. The known massive stars in Pis24 and a number of newly inferred massive stars are mainly responsible for the excitation and photodissociation of the parental molecular cloud. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011 |
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/10915/83961 |
url |
http://sedici.unlp.edu.ar/handle/10915/83961 |
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/10.1111/j.1365-2966.2011.18902.x |
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 2844-2858 |
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SEDICI (UNLP) - Universidad Nacional de La Plata |
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