A 12CO (J = 1 → 0) study towards the Ara OB1 region
- Autores
- Arnal, Edmundo Marcelo; May, J.; Romero, Gustavo Esteban
- Año de publicación
- 2003
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Intermediate angular resolution (HPBW = 8′.7) carbon monoxide (12CO J = 1 → 0) line observations towards the OB association Ara OB1 are reported. The molecular line observations cover an area of 2°.75 × 3°.00, and disclose a rich and complex distribution of the molecular line emission. The molecular features likely to be associated with the OB-association Ara OB1 span the velocity range from -28 to -20 km s-1. The most negative radial velocities are observed along NGC 6188 (≡Rim nebula). This nebula marks the interface between the HII region RCW 108 and the highly absorbing molecular material located westwards of the ionised region. The dominant CO structures, labeled E and F, have a radial velocity of about -23.5 and -21.8 km s-1, respectively. The former harbours a bright optical knot, the infrared cluster RCW-108 and the strong IRAS source 16362-4845. IRAS point sources are also seen in projection onto 12CO concentrations F and H. This may indicate that the star forming process is a widespread phenomenon in this molecular complex. Extended continuum emission, having a high degree of spatial correlation with both the infrared and molecular emission, is observed in the region. We believe that this emission, thermal in nature, arises from the ionised surface layers of the molecular complex. The ionising agents are the high mass stars of NGC6193, the nucleus of Ara OB1. The total amount of molecular gas related to Ara OB1 is about ∼1.4×104 M⊙.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto Argentino de Radioastronomía - Materia
-
Ciencias Astronómicas
HII regions: individual: RCW 108
ISM: molecules
Open clusters and associations: individual: Ara OB1
Open clusters and associations: individual: NGC 6193
Radio continuum: ISM
Radio lines: ISM - 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:10915/84499
Ver los metadatos del registro completo
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A 12CO (J = 1 → 0) study towards the Ara OB1 regionArnal, Edmundo MarceloMay, J.Romero, Gustavo EstebanCiencias AstronómicasHII regions: individual: RCW 108ISM: moleculesOpen clusters and associations: individual: Ara OB1Open clusters and associations: individual: NGC 6193Radio continuum: ISMRadio lines: ISMIntermediate angular resolution (HPBW = 8′.7) carbon monoxide (<SUP>12</SUP>CO J = 1 → 0) line observations towards the OB association Ara OB1 are reported. The molecular line observations cover an area of 2°.75 × 3°.00, and disclose a rich and complex distribution of the molecular line emission. The molecular features likely to be associated with the OB-association Ara OB1 span the velocity range from -28 to -20 km s<SUP>-1</SUP>. The most negative radial velocities are observed along NGC 6188 (≡Rim nebula). This nebula marks the interface between the HII region RCW 108 and the highly absorbing molecular material located westwards of the ionised region. The dominant CO structures, labeled E and F, have a radial velocity of about -23.5 and -21.8 km s<SUP>-1</SUP>, respectively. The former harbours a bright optical knot, the infrared cluster RCW-108 and the strong IRAS source 16362-4845. IRAS point sources are also seen in projection onto <SUP>12</SUP>CO concentrations F and H. This may indicate that the star forming process is a widespread phenomenon in this molecular complex. Extended continuum emission, having a high degree of spatial correlation with both the infrared and molecular emission, is observed in the region. We believe that this emission, thermal in nature, arises from the ionised surface layers of the molecular complex. The ionising agents are the high mass stars of NGC6193, the nucleus of Ara OB1. The total amount of molecular gas related to Ara OB1 is about ∼1.4×10<SUP>4</SUP> M⊙.Facultad de Ciencias Astronómicas y GeofísicasInstituto Argentino de Radioastronomía2003info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf431-445http://sedici.unlp.edu.ar/handle/10915/84499enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20031455info: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:UNLP2025-09-29T11:16:15Zoai:sedici.unlp.edu.ar:10915/84499Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:16.048SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
A 12CO (J = 1 → 0) study towards the Ara OB1 region |
title |
A 12CO (J = 1 → 0) study towards the Ara OB1 region |
spellingShingle |
A 12CO (J = 1 → 0) study towards the Ara OB1 region Arnal, Edmundo Marcelo Ciencias Astronómicas HII regions: individual: RCW 108 ISM: molecules Open clusters and associations: individual: Ara OB1 Open clusters and associations: individual: NGC 6193 Radio continuum: ISM Radio lines: ISM |
title_short |
A 12CO (J = 1 → 0) study towards the Ara OB1 region |
title_full |
A 12CO (J = 1 → 0) study towards the Ara OB1 region |
title_fullStr |
A 12CO (J = 1 → 0) study towards the Ara OB1 region |
title_full_unstemmed |
A 12CO (J = 1 → 0) study towards the Ara OB1 region |
title_sort |
A 12CO (J = 1 → 0) study towards the Ara OB1 region |
dc.creator.none.fl_str_mv |
Arnal, Edmundo Marcelo May, J. Romero, Gustavo Esteban |
author |
Arnal, Edmundo Marcelo |
author_facet |
Arnal, Edmundo Marcelo May, J. Romero, Gustavo Esteban |
author_role |
author |
author2 |
May, J. Romero, Gustavo Esteban |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Ciencias Astronómicas HII regions: individual: RCW 108 ISM: molecules Open clusters and associations: individual: Ara OB1 Open clusters and associations: individual: NGC 6193 Radio continuum: ISM Radio lines: ISM |
topic |
Ciencias Astronómicas HII regions: individual: RCW 108 ISM: molecules Open clusters and associations: individual: Ara OB1 Open clusters and associations: individual: NGC 6193 Radio continuum: ISM Radio lines: ISM |
dc.description.none.fl_txt_mv |
Intermediate angular resolution (HPBW = 8′.7) carbon monoxide (<SUP>12</SUP>CO J = 1 → 0) line observations towards the OB association Ara OB1 are reported. The molecular line observations cover an area of 2°.75 × 3°.00, and disclose a rich and complex distribution of the molecular line emission. The molecular features likely to be associated with the OB-association Ara OB1 span the velocity range from -28 to -20 km s<SUP>-1</SUP>. The most negative radial velocities are observed along NGC 6188 (≡Rim nebula). This nebula marks the interface between the HII region RCW 108 and the highly absorbing molecular material located westwards of the ionised region. The dominant CO structures, labeled E and F, have a radial velocity of about -23.5 and -21.8 km s<SUP>-1</SUP>, respectively. The former harbours a bright optical knot, the infrared cluster RCW-108 and the strong IRAS source 16362-4845. IRAS point sources are also seen in projection onto <SUP>12</SUP>CO concentrations F and H. This may indicate that the star forming process is a widespread phenomenon in this molecular complex. Extended continuum emission, having a high degree of spatial correlation with both the infrared and molecular emission, is observed in the region. We believe that this emission, thermal in nature, arises from the ionised surface layers of the molecular complex. The ionising agents are the high mass stars of NGC6193, the nucleus of Ara OB1. The total amount of molecular gas related to Ara OB1 is about ∼1.4×10<SUP>4</SUP> M⊙. Facultad de Ciencias Astronómicas y Geofísicas Instituto Argentino de Radioastronomía |
description |
Intermediate angular resolution (HPBW = 8′.7) carbon monoxide (<SUP>12</SUP>CO J = 1 → 0) line observations towards the OB association Ara OB1 are reported. The molecular line observations cover an area of 2°.75 × 3°.00, and disclose a rich and complex distribution of the molecular line emission. The molecular features likely to be associated with the OB-association Ara OB1 span the velocity range from -28 to -20 km s<SUP>-1</SUP>. The most negative radial velocities are observed along NGC 6188 (≡Rim nebula). This nebula marks the interface between the HII region RCW 108 and the highly absorbing molecular material located westwards of the ionised region. The dominant CO structures, labeled E and F, have a radial velocity of about -23.5 and -21.8 km s<SUP>-1</SUP>, respectively. The former harbours a bright optical knot, the infrared cluster RCW-108 and the strong IRAS source 16362-4845. IRAS point sources are also seen in projection onto <SUP>12</SUP>CO concentrations F and H. This may indicate that the star forming process is a widespread phenomenon in this molecular complex. Extended continuum emission, having a high degree of spatial correlation with both the infrared and molecular emission, is observed in the region. We believe that this emission, thermal in nature, arises from the ionised surface layers of the molecular complex. The ionising agents are the high mass stars of NGC6193, the nucleus of Ara OB1. The total amount of molecular gas related to Ara OB1 is about ∼1.4×10<SUP>4</SUP> M⊙. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003 |
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/10915/84499 |
url |
http://sedici.unlp.edu.ar/handle/10915/84499 |
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/10.1051/0004-6361:20031455 |
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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