A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103
- Autores
- Santos, Julia; Bronfman, Leonardo; Mendoza, Edgar; Lépine, Jacques R. D.; Duronea, Nicolas Urbano; Merello, Manuel; Finger, Ricardo
- Año de publicación
- 2022
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- A spectral survey of methyl acetylene (CH3CCH) was conducted toward the hot molecular core/outflow G331.512-0.103. Our APEX observations allowed the detection of 41 uncontaminated rotational lines of CH3CCH in the frequency range between 172 and 356 GHz. Through an analysis under the local thermodynamic equilibrium assumption, by means of rotational diagrams, we determined T exc = 50 ? 1 K, N(CH3CCH) = (7.5 ? 0.4) ? 1015 cm2, X[CH3CCH/H2] ≈ (0.8-2.8) ? 10-8, and X[CH3CCH/CH3OH] ≈ 0.42 ? 0.05 for an extended emitting region (∼10″). The relative intensities of the K = 2 and K = 3 lines within a given K-ladder are strongly negatively correlated to the transitions' upper J quantum number (r = -0.84). Pure rotational spectra of CH3CCH were simulated at different temperatures, in order to interpret this observation. The results indicate that the emission is characterized by a nonnegligible temperature gradient with upper and lower limits of ∼45 and ∼60 K, respectively. Moreover, the line widths and peak velocities show an overall strong correlation with their rest frequencies, suggesting that the warmer gas is also associated with stronger turbulence effects. The K = 0 transitions present a slightly different kinematic signature than the remaining lines, indicating that they might be tracing a different gas component. We speculate that this component is characterized by lower temperatures and therefore larger sizes. Moreover, we predict and discuss the temporal evolution of the CH3CCH abundance using a two-stage zero-dimensional model of the source constructed with the three-phase Nautilus gas-grain code.
Fil: Santos, Julia. Universidade de Sao Paulo; Brasil
Fil: Bronfman, Leonardo. Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas; Chile
Fil: Mendoza, Edgar. Universidade de Sao Paulo; Brasil. Universidade Federal do Rio de Janeiro; Brasil
Fil: Lépine, Jacques R. D.. Universidade de Sao Paulo; Brasil
Fil: Duronea, Nicolas Urbano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Merello, Manuel. Universidad de Chile; Chile
Fil: Finger, Ricardo. Universidad de Chile; Chile - Materia
-
Methyl acetylene
Molecular outflows
Hot Molecular Cores
Astrochemistry - 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:11336/210900
Ver los metadatos del registro completo
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A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103Santos, JuliaBronfman, LeonardoMendoza, EdgarLépine, Jacques R. D.Duronea, Nicolas UrbanoMerello, ManuelFinger, RicardoMethyl acetyleneMolecular outflowsHot Molecular CoresAstrochemistryhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A spectral survey of methyl acetylene (CH3CCH) was conducted toward the hot molecular core/outflow G331.512-0.103. Our APEX observations allowed the detection of 41 uncontaminated rotational lines of CH3CCH in the frequency range between 172 and 356 GHz. Through an analysis under the local thermodynamic equilibrium assumption, by means of rotational diagrams, we determined T exc = 50 ? 1 K, N(CH3CCH) = (7.5 ? 0.4) ? 1015 cm2, X[CH3CCH/H2] ≈ (0.8-2.8) ? 10-8, and X[CH3CCH/CH3OH] ≈ 0.42 ? 0.05 for an extended emitting region (∼10″). The relative intensities of the K = 2 and K = 3 lines within a given K-ladder are strongly negatively correlated to the transitions' upper J quantum number (r = -0.84). Pure rotational spectra of CH3CCH were simulated at different temperatures, in order to interpret this observation. The results indicate that the emission is characterized by a nonnegligible temperature gradient with upper and lower limits of ∼45 and ∼60 K, respectively. Moreover, the line widths and peak velocities show an overall strong correlation with their rest frequencies, suggesting that the warmer gas is also associated with stronger turbulence effects. The K = 0 transitions present a slightly different kinematic signature than the remaining lines, indicating that they might be tracing a different gas component. We speculate that this component is characterized by lower temperatures and therefore larger sizes. Moreover, we predict and discuss the temporal evolution of the CH3CCH abundance using a two-stage zero-dimensional model of the source constructed with the three-phase Nautilus gas-grain code.Fil: Santos, Julia. Universidade de Sao Paulo; BrasilFil: Bronfman, Leonardo. Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas; ChileFil: Mendoza, Edgar. Universidade de Sao Paulo; Brasil. Universidade Federal do Rio de Janeiro; BrasilFil: Lépine, Jacques R. D.. Universidade de Sao Paulo; BrasilFil: Duronea, Nicolas Urbano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Merello, Manuel. Universidad de Chile; ChileFil: Finger, Ricardo. Universidad de Chile; ChileIOP Publishing2022-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/210900Santos, Julia; Bronfman, Leonardo; Mendoza, Edgar; Lépine, Jacques R. D.; Duronea, Nicolas Urbano; et al.; A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103; IOP Publishing; Astrophysical Journal; 925; 1; 3-2022; 1-180004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/ac36ccinfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/ac36ccinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:34:42Zoai:ri.conicet.gov.ar:11336/210900instacron: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 09:34:42.781CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103 |
title |
A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103 |
spellingShingle |
A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103 Santos, Julia Methyl acetylene Molecular outflows Hot Molecular Cores Astrochemistry |
title_short |
A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103 |
title_full |
A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103 |
title_fullStr |
A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103 |
title_full_unstemmed |
A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103 |
title_sort |
A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103 |
dc.creator.none.fl_str_mv |
Santos, Julia Bronfman, Leonardo Mendoza, Edgar Lépine, Jacques R. D. Duronea, Nicolas Urbano Merello, Manuel Finger, Ricardo |
author |
Santos, Julia |
author_facet |
Santos, Julia Bronfman, Leonardo Mendoza, Edgar Lépine, Jacques R. D. Duronea, Nicolas Urbano Merello, Manuel Finger, Ricardo |
author_role |
author |
author2 |
Bronfman, Leonardo Mendoza, Edgar Lépine, Jacques R. D. Duronea, Nicolas Urbano Merello, Manuel Finger, Ricardo |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
Methyl acetylene Molecular outflows Hot Molecular Cores Astrochemistry |
topic |
Methyl acetylene Molecular outflows Hot Molecular Cores Astrochemistry |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
A spectral survey of methyl acetylene (CH3CCH) was conducted toward the hot molecular core/outflow G331.512-0.103. Our APEX observations allowed the detection of 41 uncontaminated rotational lines of CH3CCH in the frequency range between 172 and 356 GHz. Through an analysis under the local thermodynamic equilibrium assumption, by means of rotational diagrams, we determined T exc = 50 ? 1 K, N(CH3CCH) = (7.5 ? 0.4) ? 1015 cm2, X[CH3CCH/H2] ≈ (0.8-2.8) ? 10-8, and X[CH3CCH/CH3OH] ≈ 0.42 ? 0.05 for an extended emitting region (∼10″). The relative intensities of the K = 2 and K = 3 lines within a given K-ladder are strongly negatively correlated to the transitions' upper J quantum number (r = -0.84). Pure rotational spectra of CH3CCH were simulated at different temperatures, in order to interpret this observation. The results indicate that the emission is characterized by a nonnegligible temperature gradient with upper and lower limits of ∼45 and ∼60 K, respectively. Moreover, the line widths and peak velocities show an overall strong correlation with their rest frequencies, suggesting that the warmer gas is also associated with stronger turbulence effects. The K = 0 transitions present a slightly different kinematic signature than the remaining lines, indicating that they might be tracing a different gas component. We speculate that this component is characterized by lower temperatures and therefore larger sizes. Moreover, we predict and discuss the temporal evolution of the CH3CCH abundance using a two-stage zero-dimensional model of the source constructed with the three-phase Nautilus gas-grain code. Fil: Santos, Julia. Universidade de Sao Paulo; Brasil Fil: Bronfman, Leonardo. Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas; Chile Fil: Mendoza, Edgar. Universidade de Sao Paulo; Brasil. Universidade Federal do Rio de Janeiro; Brasil Fil: Lépine, Jacques R. D.. Universidade de Sao Paulo; Brasil Fil: Duronea, Nicolas Urbano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Merello, Manuel. Universidad de Chile; Chile Fil: Finger, Ricardo. Universidad de Chile; Chile |
description |
A spectral survey of methyl acetylene (CH3CCH) was conducted toward the hot molecular core/outflow G331.512-0.103. Our APEX observations allowed the detection of 41 uncontaminated rotational lines of CH3CCH in the frequency range between 172 and 356 GHz. Through an analysis under the local thermodynamic equilibrium assumption, by means of rotational diagrams, we determined T exc = 50 ? 1 K, N(CH3CCH) = (7.5 ? 0.4) ? 1015 cm2, X[CH3CCH/H2] ≈ (0.8-2.8) ? 10-8, and X[CH3CCH/CH3OH] ≈ 0.42 ? 0.05 for an extended emitting region (∼10″). The relative intensities of the K = 2 and K = 3 lines within a given K-ladder are strongly negatively correlated to the transitions' upper J quantum number (r = -0.84). Pure rotational spectra of CH3CCH were simulated at different temperatures, in order to interpret this observation. The results indicate that the emission is characterized by a nonnegligible temperature gradient with upper and lower limits of ∼45 and ∼60 K, respectively. Moreover, the line widths and peak velocities show an overall strong correlation with their rest frequencies, suggesting that the warmer gas is also associated with stronger turbulence effects. The K = 0 transitions present a slightly different kinematic signature than the remaining lines, indicating that they might be tracing a different gas component. We speculate that this component is characterized by lower temperatures and therefore larger sizes. Moreover, we predict and discuss the temporal evolution of the CH3CCH abundance using a two-stage zero-dimensional model of the source constructed with the three-phase Nautilus gas-grain code. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-03 |
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/11336/210900 Santos, Julia; Bronfman, Leonardo; Mendoza, Edgar; Lépine, Jacques R. D.; Duronea, Nicolas Urbano; et al.; A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103; IOP Publishing; Astrophysical Journal; 925; 1; 3-2022; 1-18 0004-637X CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/210900 |
identifier_str_mv |
Santos, Julia; Bronfman, Leonardo; Mendoza, Edgar; Lépine, Jacques R. D.; Duronea, Nicolas Urbano; et al.; A Spectral Survey of CH3CCH in the Hot Molecular Core G331.512-0.103; IOP Publishing; Astrophysical Journal; 925; 1; 3-2022; 1-18 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/url/https://iopscience.iop.org/article/10.3847/1538-4357/ac36cc info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/ac36cc |
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 |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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