G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN
- Autores
- Mendoza, Edgar; Bronfman, Leonardo; Duronea, Nicolas Urbano; Lepine, Jacques; Finger, Ricardo; Merello, Manuel; Hervías Caimapo, Carlos; Gama, Diana R. G.; Reyes, Nicolas; Åke Nyman, Lars
- Año de publicación
- 2018
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Spectral line surveys reveal rich molecular reservoirs in G331.512-0.103, a compact radio source in the center of an energetic molecular outflow. In this first work, we analyse the physical conditions of the source by means of CH3OH and CH3CN. The observations were performed with the APEX telescope. Six different system configurations were defined to cover most of the band within (292–356) GHz; as a consequence we detected a forest of lines towards the central core. A total of 70 lines of A/E-CH3OH and A/E-CH3CN were analysed, including torsionally excited transitions of CH3OH (νt=1). In a search for all the isotopologues, we identified transitions of 13CH3OH. The physical conditions were derived considering collisional and radiative processes. We found common temperatures for each A and E symmetry of CH3OH and CH3CN; the derived column densities indicate an A/E equilibrated ratio for both tracers. The results reveal that CH3CN and CH3OH trace a hot and cold component with Tk ∼ 141 K and Tk ∼ 74 K, respectively. In agreement with previous ALMA observations, the models show that the emission region is compact (. 5.5 ′′) with gas density n(H2)=(0.7–1) × 107 cm−3 . The CH3OH/CH3CN abundance ratio and the evidences for pre-biotic and complex organic molecules suggest a rich and active chemistry towards G331.512-0.103.
Fil: Mendoza, Edgar. Universidade de Sao Paulo; Brasil
Fil: Bronfman, Leonardo. Universidad de Chile; Chile
Fil: Duronea, Nicolas Urbano. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Lepine, Jacques. Universidade de Sao Paulo; Brasil
Fil: Finger, Ricardo. Universidad de Chile; Chile
Fil: Merello, Manuel. Istituto Nazionale di Astrofisica; Italia
Fil: Hervías Caimapo, Carlos. Universidad de Chile; Chile. University of Manchester; Reino Unido
Fil: Gama, Diana R. G.. Universidade de Sao Paulo; Brasil
Fil: Reyes, Nicolas. Universidad de Chile; Chile
Fil: Åke Nyman, Lars. Joint Alma Observatory; Chile - Materia
-
ISM: MOLECULES
MOLECULAR PROCESSES
RADIO LINES: ISM - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/82427
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CONICET Digital (CONICET) |
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G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CNMendoza, EdgarBronfman, LeonardoDuronea, Nicolas UrbanoLepine, JacquesFinger, RicardoMerello, ManuelHervías Caimapo, CarlosGama, Diana R. G.Reyes, NicolasÅke Nyman, LarsISM: MOLECULESMOLECULAR PROCESSESRADIO LINES: ISMhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Spectral line surveys reveal rich molecular reservoirs in G331.512-0.103, a compact radio source in the center of an energetic molecular outflow. In this first work, we analyse the physical conditions of the source by means of CH3OH and CH3CN. The observations were performed with the APEX telescope. Six different system configurations were defined to cover most of the band within (292–356) GHz; as a consequence we detected a forest of lines towards the central core. A total of 70 lines of A/E-CH3OH and A/E-CH3CN were analysed, including torsionally excited transitions of CH3OH (νt=1). In a search for all the isotopologues, we identified transitions of 13CH3OH. The physical conditions were derived considering collisional and radiative processes. We found common temperatures for each A and E symmetry of CH3OH and CH3CN; the derived column densities indicate an A/E equilibrated ratio for both tracers. The results reveal that CH3CN and CH3OH trace a hot and cold component with Tk ∼ 141 K and Tk ∼ 74 K, respectively. In agreement with previous ALMA observations, the models show that the emission region is compact (. 5.5 ′′) with gas density n(H2)=(0.7–1) × 107 cm−3 . The CH3OH/CH3CN abundance ratio and the evidences for pre-biotic and complex organic molecules suggest a rich and active chemistry towards G331.512-0.103.Fil: Mendoza, Edgar. Universidade de Sao Paulo; BrasilFil: Bronfman, Leonardo. Universidad de Chile; ChileFil: Duronea, Nicolas Urbano. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Lepine, Jacques. Universidade de Sao Paulo; BrasilFil: Finger, Ricardo. Universidad de Chile; ChileFil: Merello, Manuel. Istituto Nazionale di Astrofisica; ItaliaFil: Hervías Caimapo, Carlos. Universidad de Chile; Chile. University of Manchester; Reino UnidoFil: Gama, Diana R. G.. Universidade de Sao Paulo; BrasilFil: Reyes, Nicolas. Universidad de Chile; ChileFil: Åke Nyman, Lars. Joint Alma Observatory; ChileIOP Publishing2018-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/82427Mendoza, Edgar; Bronfman, Leonardo; Duronea, Nicolas Urbano; Lepine, Jacques; Finger, Ricardo; et al.; G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN; IOP Publishing; Astrophysical Journal; 853; 2; 2-2018; 1-150004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/aaa1ecinfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/aaa1ecinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:02:16Zoai:ri.conicet.gov.ar:11336/82427instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:02:17.039CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN |
title |
G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN |
spellingShingle |
G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN Mendoza, Edgar ISM: MOLECULES MOLECULAR PROCESSES RADIO LINES: ISM |
title_short |
G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN |
title_full |
G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN |
title_fullStr |
G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN |
title_full_unstemmed |
G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN |
title_sort |
G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN |
dc.creator.none.fl_str_mv |
Mendoza, Edgar Bronfman, Leonardo Duronea, Nicolas Urbano Lepine, Jacques Finger, Ricardo Merello, Manuel Hervías Caimapo, Carlos Gama, Diana R. G. Reyes, Nicolas Åke Nyman, Lars |
author |
Mendoza, Edgar |
author_facet |
Mendoza, Edgar Bronfman, Leonardo Duronea, Nicolas Urbano Lepine, Jacques Finger, Ricardo Merello, Manuel Hervías Caimapo, Carlos Gama, Diana R. G. Reyes, Nicolas Åke Nyman, Lars |
author_role |
author |
author2 |
Bronfman, Leonardo Duronea, Nicolas Urbano Lepine, Jacques Finger, Ricardo Merello, Manuel Hervías Caimapo, Carlos Gama, Diana R. G. Reyes, Nicolas Åke Nyman, Lars |
author2_role |
author author author author author author author author author |
dc.subject.none.fl_str_mv |
ISM: MOLECULES MOLECULAR PROCESSES RADIO LINES: ISM |
topic |
ISM: MOLECULES MOLECULAR PROCESSES RADIO LINES: ISM |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Spectral line surveys reveal rich molecular reservoirs in G331.512-0.103, a compact radio source in the center of an energetic molecular outflow. In this first work, we analyse the physical conditions of the source by means of CH3OH and CH3CN. The observations were performed with the APEX telescope. Six different system configurations were defined to cover most of the band within (292–356) GHz; as a consequence we detected a forest of lines towards the central core. A total of 70 lines of A/E-CH3OH and A/E-CH3CN were analysed, including torsionally excited transitions of CH3OH (νt=1). In a search for all the isotopologues, we identified transitions of 13CH3OH. The physical conditions were derived considering collisional and radiative processes. We found common temperatures for each A and E symmetry of CH3OH and CH3CN; the derived column densities indicate an A/E equilibrated ratio for both tracers. The results reveal that CH3CN and CH3OH trace a hot and cold component with Tk ∼ 141 K and Tk ∼ 74 K, respectively. In agreement with previous ALMA observations, the models show that the emission region is compact (. 5.5 ′′) with gas density n(H2)=(0.7–1) × 107 cm−3 . The CH3OH/CH3CN abundance ratio and the evidences for pre-biotic and complex organic molecules suggest a rich and active chemistry towards G331.512-0.103. Fil: Mendoza, Edgar. Universidade de Sao Paulo; Brasil Fil: Bronfman, Leonardo. Universidad de Chile; Chile Fil: Duronea, Nicolas Urbano. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina Fil: Lepine, Jacques. Universidade de Sao Paulo; Brasil Fil: Finger, Ricardo. Universidad de Chile; Chile Fil: Merello, Manuel. Istituto Nazionale di Astrofisica; Italia Fil: Hervías Caimapo, Carlos. Universidad de Chile; Chile. University of Manchester; Reino Unido Fil: Gama, Diana R. G.. Universidade de Sao Paulo; Brasil Fil: Reyes, Nicolas. Universidad de Chile; Chile Fil: Åke Nyman, Lars. Joint Alma Observatory; Chile |
description |
Spectral line surveys reveal rich molecular reservoirs in G331.512-0.103, a compact radio source in the center of an energetic molecular outflow. In this first work, we analyse the physical conditions of the source by means of CH3OH and CH3CN. The observations were performed with the APEX telescope. Six different system configurations were defined to cover most of the band within (292–356) GHz; as a consequence we detected a forest of lines towards the central core. A total of 70 lines of A/E-CH3OH and A/E-CH3CN were analysed, including torsionally excited transitions of CH3OH (νt=1). In a search for all the isotopologues, we identified transitions of 13CH3OH. The physical conditions were derived considering collisional and radiative processes. We found common temperatures for each A and E symmetry of CH3OH and CH3CN; the derived column densities indicate an A/E equilibrated ratio for both tracers. The results reveal that CH3CN and CH3OH trace a hot and cold component with Tk ∼ 141 K and Tk ∼ 74 K, respectively. In agreement with previous ALMA observations, the models show that the emission region is compact (. 5.5 ′′) with gas density n(H2)=(0.7–1) × 107 cm−3 . The CH3OH/CH3CN abundance ratio and the evidences for pre-biotic and complex organic molecules suggest a rich and active chemistry towards G331.512-0.103. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-02 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 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://hdl.handle.net/11336/82427 Mendoza, Edgar; Bronfman, Leonardo; Duronea, Nicolas Urbano; Lepine, Jacques; Finger, Ricardo; et al.; G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN; IOP Publishing; Astrophysical Journal; 853; 2; 2-2018; 1-15 0004-637X CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/82427 |
identifier_str_mv |
Mendoza, Edgar; Bronfman, Leonardo; Duronea, Nicolas Urbano; Lepine, Jacques; Finger, Ricardo; et al.; G331.512-0.103: An Interstellar Laboratory for Molecular Synthesis. I. the Ortho-to-para Ratios for CH3OH and CH3CN; IOP Publishing; Astrophysical Journal; 853; 2; 2-2018; 1-15 0004-637X CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/aaa1ec info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/aaa1ec |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
IOP Publishing |
publisher.none.fl_str_mv |
IOP Publishing |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613825280606208 |
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13.070432 |