Isocyanic acid (HNCO) in the hot molecular core G331.512-0.103: observations and chemical modelling
| Autor: | Amâncio C. S. Friaça, E. Mendoza, Carla M. Canelo, Leonardo Bronfman, Jacques Raymond Daniel Lépine, Manuel Merello, Miguel Carvajal, N. U. Duronea |
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| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
European Regional Development Fund FOS: Physical sciences Molecular processes 7. Clean energy 01 natural sciences purl.org/becyt/ford/1 [https] MIE moléculas 0103 physical sciences media_common.cataloged_instance observational [Methods] European union 010303 astronomy & astrophysics Astroquímica molecules [ISM] Astrochemistry 0105 earth and related environmental sciences media_common Physics Molecular data Astronomy and Astrophysics purl.org/becyt/ford/1.3 [https] Astrophysics - Astrophysics of Galaxies Methods observational 13. Climate action Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Humanities |
| Zdroj: | Digibug. Repositorio Institucional de la Universidad de Granada instname Digibug: Repositorio Institucional de la Universidad de Granada Universidad de Granada (UGR) CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stab1163 |
| Popis: | The authors thank the anonymous referee for the useful comments that improved the article. CMC acknowledges the support of CNPq, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico Brazil, process number 141714/2016-6. This study was financed in part by the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) - Finance Code 001. LB acknowledges support fromCONICYT (Comision Nacional de Investigacion Cientifica y Tecnologica) project Basal AFB-170002. EM acknowledges support from the Brazilian agencies FAPESP (Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, grant 2014/22095-6) and CNPq (grant 150465/2019-0). MC acknowledges the financial support from theEuropean Union'sHorizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement no 872081; from the Spanish National Research, Development, and Innovation plan (RDI plan) under the project PID2019-104002GB-C21; the Consejeria de Conocimiento, Investigacion y Universidad, Junta de Andalucia and European Regional Development Fund (ERDF), ref. SOMM17/6105/UGR; the Ministerio de Ciencia, Innovacion y Universidades (ref. COOPB20364); and by the Centro de Estudios Avanzados en Fisica, Matematicas y Computacion (CEAFMC) of the University of Huelva. Isocyanic acid (HNCO) is a simple molecule with a potential to form prebiotic and complex organic species. Using a spectral survey collected with the Atacama Pathfinder EXperiment, in this work we report the detection of 42 transitions of HNCO in the hot molecular core/outflow G331.512-0.103 (hereafter G331). The spectral lines were observed in the frequency interval ∼160–355 GHz. By means of Local Thermodynamic Equilibrium analyses, applying the rotational diagram method, we studied the excitation conditions of HNCO. The excitation temperature and column density are estimated to be Tex= 58.8 ± 2.7 K and N = (3.7 ± 0.5) × 1015 cm−2, considering beam dilution effects. The derived relative abundance is between (3.8 ± 0.5) × 10−9 and (1.4 ± 0.2) × 10−8. In comparison with other hot molecular cores, our column densities and abundances are in agreement. An update of the internal partition functions of the four CHNO isomers: HNCO; cyanic acid, HOCN; fulminic acid, HCNO; and isofulminic acid, HONC is provided. We also used the astrochemical code NAUTILUS to model and discuss HNCO abundances. The simulations could reproduce the abundances with a simple zero-dimensional model at a temperature of 60 K and for a chemical age of ∼105 yr, which is larger than the estimated dynamical age for G331. This result could suggest the need for a more robust model and even the revision of chemical reactions associated with HNCO. Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) 141714/2016-6 Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) 001 Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) Basal AFB-170002 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 European Union'sHorizon 2020 research and innovation program under the Marie Sklodowska-Curie grant 872081 Spanish National Research, Development, and Innovation plan (RDI plan) PID2019-104002GB-C21 Consejeria de Conocimiento, Investigacion y Universidad Junta de Andalucia European Commission SOMM17/6105/UGR Ministerio de Ciencia, Innovacion y Universidades COOPB20364 Centro de Estudios Avanzados en Fisica, Matematicas y Computacion (CEAFMC) of the University of Huelva |
| Databáze: | OpenAIRE |
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