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Authordc.contributor.authorSantos, Julia C.
Authordc.contributor.authorBronfman Aguiló, Leonardo Jaime
Authordc.contributor.authorMendoza, Edgar
Authordc.contributor.authorLépine, Jacques R. D.
Authordc.contributor.authorDuronea, Nicolas U.
Authordc.contributor.authorMerello Ferrada, Manuel Antonio
Authordc.contributor.authorFinger Camus, Ricardo Alberto
Admission datedc.date.accessioned2022-12-07T15:23:19Z
Available datedc.date.available2022-12-07T15:23:19Z
Publication datedc.date.issued2022
Cita de ítemdc.identifier.citationThe Astrophysical Journal, 925:3 (13pp), 2022 January 20es_ES
Identifierdc.identifier.other10.3847/1538-4357/ac36cc
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/189664
Abstractdc.description.abstractA 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) x 10(15) cm(2), X[CH3CCH/H-2] approximate to (0.8-2.8) x 10(-8), and X[CH3CCH/CH3OH] approximate to 0.42 +/- 0.05 for an extended emitting region (similar to 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 similar to 45 and similar to 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.es_ES
Patrocinadordc.description.sponsorshipAtacama Pathfinder Experiment (APEX) C-094.F-9709B-2014 C-097.F-9710A-2016 C-099.F-9702A-2017 C-0102.F-9702B-2018 ANID BASAL project FB210003 Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) 2014/22095-6 Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) 150465/2019-0 ANID, Programa de Astronomia Fondo ALMA-CONICYT, project 3119AS0001 ANID through the ALMA-CONICYT 31180005es_ES
Lenguagedc.language.isoenes_ES
Publisherdc.publisherIOPes_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
Link to Licensedc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/us/*
Sourcedc.sourceThe Astrophysical Journales_ES
Keywordsdc.subjectChemical-compositiones_ES
Keywordsdc.subjectTemperature probees_ES
Keywordsdc.subjectMicrowave-spectraes_ES
Keywordsdc.subjectCologne databasees_ES
Keywordsdc.subjectDense gases_ES
Keywordsdc.subjectChemistryes_ES
Keywordsdc.subjectSubmillimeteres_ES
Keywordsdc.subjectPropynees_ES
Keywordsdc.subjectCloudses_ES
Keywordsdc.subjectOriones_ES
Títulodc.titleA spectral survey of CH3CCH in the hot molecular core G331.512-0.103es_ES
Document typedc.typeArtículo de revistaes_ES
dc.description.versiondc.description.versionVersión publicada - versión final del editores_ES
dcterms.accessRightsdcterms.accessRightsAcceso abiertoes_ES
Catalogueruchile.catalogadorapces_ES
Indexationuchile.indexArtículo de publícación WoSes_ES


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Attribution-NonCommercial-NoDerivs 3.0 United States
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 United States