NGC 3503 and its molecular environment

Autores
Duronea, Nicolás Urbano; Vasquez, Javier; Cappa, Cristina Elisabet; Corti, Mariela Alejandra; Arnal, Edmundo Marcelo
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Aims. We present a study of the molecular gas and interstellar dust distribution in the environs of the Hiiπ region NGC 3503 associated with the open cluster Pis 17 with the aim of investigating the spatial distribution of the molecular gas linked to the nebula and achieving a better understanding of the interaction of the nebula and Pis 17 with their molecular environment. Methods. We based our study on 12CO(1-0) observations of a region of ∼0°6 in size obtained with the 4-m NANTEN telescope, unpublished radio continuum data at 4800 and 8640 MHz obtained with the ATCA telescope, radio continuum data at 843 MHz obtained from SUMSS, and available IRAS, MSX, IRAC-GLIMPSE, and MIPSGAL images. Results. We found a molecular cloud (Component 1) having a mean velocity of -24.7 km s -1 ,compatible with the velocity of the ionized gas, which is associated with the nebula and its surroundings. Adopting a distance of 2.9 ± 0.4 kpc, the total molecular mass yields (7.6 ± 2.1) × 10 3M⊙ and density yields 400 ± 240 cm -3. The radio continuum data confirm the existence of an electron density gradient in NGC 3503. The IR emission shows a PDR bordering the higher density regions of the nebula. The spatial distribution of the CO emission shows that the nebula coincides with a molecular clump, and the strongest CO emission peak is located close to the higher electron density region. The more negative velocities of the molecular gas (about -27 km s -1), are coincident with NGC 3503. Candidate young stellar objects (YSOs) were detected toward the Hii region, suggesting that embedded star formation may be occurring in the neighborhood of the nebula. The clear electron density gradient, along with the spatial distribution of the molecular gas and PAHs in the region indicates that NGC 3503 is a blister-type Hii region that has probably undergone a champagne phase.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
HII regions
ISM: clouds
ISM: kinematics and dynamics
ISM: molecules
Photon-dominated region (PDR)
Radio continuum: ISM
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:10915/84622

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/84622
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling NGC 3503 and its molecular environmentDuronea, Nicolás UrbanoVasquez, JavierCappa, Cristina ElisabetCorti, Mariela AlejandraArnal, Edmundo MarceloCiencias AstronómicasHII regionsISM: cloudsISM: kinematics and dynamicsISM: moleculesPhoton-dominated region (PDR)Radio continuum: ISM<b>Aims.</b> We present a study of the molecular gas and interstellar dust distribution in the environs of the Hiiπ region NGC 3503 associated with the open cluster Pis 17 with the aim of investigating the spatial distribution of the molecular gas linked to the nebula and achieving a better understanding of the interaction of the nebula and Pis 17 with their molecular environment. <b>Methods.</b> We based our study on 12CO(1-0) observations of a region of ∼0°6 in size obtained with the 4-m NANTEN telescope, unpublished radio continuum data at 4800 and 8640 MHz obtained with the ATCA telescope, radio continuum data at 843 MHz obtained from SUMSS, and available IRAS, MSX, IRAC-GLIMPSE, and MIPSGAL images. <b>Results.</b> We found a molecular cloud (Component 1) having a mean velocity of -24.7 km s -1 ,compatible with the velocity of the ionized gas, which is associated with the nebula and its surroundings. Adopting a distance of 2.9 ± 0.4 kpc, the total molecular mass yields (7.6 ± 2.1) × 10 3M⊙ and density yields 400 ± 240 cm -3. The radio continuum data confirm the existence of an electron density gradient in NGC 3503. The IR emission shows a PDR bordering the higher density regions of the nebula. The spatial distribution of the CO emission shows that the nebula coincides with a molecular clump, and the strongest CO emission peak is located close to the higher electron density region. The more negative velocities of the molecular gas (about -27 km s -1), are coincident with NGC 3503. Candidate young stellar objects (YSOs) were detected toward the Hii region, suggesting that embedded star formation may be occurring in the neighborhood of the nebula. The clear electron density gradient, along with the spatial distribution of the molecular gas and PAHs in the region indicates that NGC 3503 is a blister-type Hii region that has probably undergone a champagne phase.Facultad de Ciencias Astronómicas y Geofísicas2012-01-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/84622enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201117958info: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:UNLP2025-09-29T11:16:05Zoai:sedici.unlp.edu.ar:10915/84622Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:05.534SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv NGC 3503 and its molecular environment
title NGC 3503 and its molecular environment
spellingShingle NGC 3503 and its molecular environment
Duronea, Nicolás Urbano
Ciencias Astronómicas
HII regions
ISM: clouds
ISM: kinematics and dynamics
ISM: molecules
Photon-dominated region (PDR)
Radio continuum: ISM
title_short NGC 3503 and its molecular environment
title_full NGC 3503 and its molecular environment
title_fullStr NGC 3503 and its molecular environment
title_full_unstemmed NGC 3503 and its molecular environment
title_sort NGC 3503 and its molecular environment
dc.creator.none.fl_str_mv Duronea, Nicolás Urbano
Vasquez, Javier
Cappa, Cristina Elisabet
Corti, Mariela Alejandra
Arnal, Edmundo Marcelo
author Duronea, Nicolás Urbano
author_facet Duronea, Nicolás Urbano
Vasquez, Javier
Cappa, Cristina Elisabet
Corti, Mariela Alejandra
Arnal, Edmundo Marcelo
author_role author
author2 Vasquez, Javier
Cappa, Cristina Elisabet
Corti, Mariela Alejandra
Arnal, Edmundo Marcelo
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
HII regions
ISM: clouds
ISM: kinematics and dynamics
ISM: molecules
Photon-dominated region (PDR)
Radio continuum: ISM
topic Ciencias Astronómicas
HII regions
ISM: clouds
ISM: kinematics and dynamics
ISM: molecules
Photon-dominated region (PDR)
Radio continuum: ISM
dc.description.none.fl_txt_mv <b>Aims.</b> We present a study of the molecular gas and interstellar dust distribution in the environs of the Hiiπ region NGC 3503 associated with the open cluster Pis 17 with the aim of investigating the spatial distribution of the molecular gas linked to the nebula and achieving a better understanding of the interaction of the nebula and Pis 17 with their molecular environment. <b>Methods.</b> We based our study on 12CO(1-0) observations of a region of ∼0°6 in size obtained with the 4-m NANTEN telescope, unpublished radio continuum data at 4800 and 8640 MHz obtained with the ATCA telescope, radio continuum data at 843 MHz obtained from SUMSS, and available IRAS, MSX, IRAC-GLIMPSE, and MIPSGAL images. <b>Results.</b> We found a molecular cloud (Component 1) having a mean velocity of -24.7 km s -1 ,compatible with the velocity of the ionized gas, which is associated with the nebula and its surroundings. Adopting a distance of 2.9 ± 0.4 kpc, the total molecular mass yields (7.6 ± 2.1) × 10 3M⊙ and density yields 400 ± 240 cm -3. The radio continuum data confirm the existence of an electron density gradient in NGC 3503. The IR emission shows a PDR bordering the higher density regions of the nebula. The spatial distribution of the CO emission shows that the nebula coincides with a molecular clump, and the strongest CO emission peak is located close to the higher electron density region. The more negative velocities of the molecular gas (about -27 km s -1), are coincident with NGC 3503. Candidate young stellar objects (YSOs) were detected toward the Hii region, suggesting that embedded star formation may be occurring in the neighborhood of the nebula. The clear electron density gradient, along with the spatial distribution of the molecular gas and PAHs in the region indicates that NGC 3503 is a blister-type Hii region that has probably undergone a champagne phase.
Facultad de Ciencias Astronómicas y Geofísicas
description <b>Aims.</b> We present a study of the molecular gas and interstellar dust distribution in the environs of the Hiiπ region NGC 3503 associated with the open cluster Pis 17 with the aim of investigating the spatial distribution of the molecular gas linked to the nebula and achieving a better understanding of the interaction of the nebula and Pis 17 with their molecular environment. <b>Methods.</b> We based our study on 12CO(1-0) observations of a region of ∼0°6 in size obtained with the 4-m NANTEN telescope, unpublished radio continuum data at 4800 and 8640 MHz obtained with the ATCA telescope, radio continuum data at 843 MHz obtained from SUMSS, and available IRAS, MSX, IRAC-GLIMPSE, and MIPSGAL images. <b>Results.</b> We found a molecular cloud (Component 1) having a mean velocity of -24.7 km s -1 ,compatible with the velocity of the ionized gas, which is associated with the nebula and its surroundings. Adopting a distance of 2.9 ± 0.4 kpc, the total molecular mass yields (7.6 ± 2.1) × 10 3M⊙ and density yields 400 ± 240 cm -3. The radio continuum data confirm the existence of an electron density gradient in NGC 3503. The IR emission shows a PDR bordering the higher density regions of the nebula. The spatial distribution of the CO emission shows that the nebula coincides with a molecular clump, and the strongest CO emission peak is located close to the higher electron density region. The more negative velocities of the molecular gas (about -27 km s -1), are coincident with NGC 3503. Candidate young stellar objects (YSOs) were detected toward the Hii region, suggesting that embedded star formation may be occurring in the neighborhood of the nebula. The clear electron density gradient, along with the spatial distribution of the molecular gas and PAHs in the region indicates that NGC 3503 is a blister-type Hii region that has probably undergone a champagne phase.
publishDate 2012
dc.date.none.fl_str_mv 2012-01-12
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/10915/84622
url http://sedici.unlp.edu.ar/handle/10915/84622
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-6361
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201117958
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
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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