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
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/82427
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling 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 Técnicas2025-10-22T11:31:43Zoai: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:34982025-10-22 11:31:44.07CONICET 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
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv 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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score 12.982451

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