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Campo DC | Valor | Idioma |
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dc.rights.license | © ESO 2020 | - |
dc.contributor.author | Navarro Almaida, D. | - |
dc.contributor.author | Le Gal, R. | - |
dc.contributor.author | Fuente, A. | - |
dc.contributor.author | Rivière Marichalar, P. | - |
dc.contributor.author | Wakelam, V. | - |
dc.contributor.author | Cazaux, S. | - |
dc.contributor.author | Caselli, P. | - |
dc.contributor.author | Laas, J. C. | - |
dc.contributor.author | Alonso Albi, T. | - |
dc.contributor.author | Loison, J. C. | - |
dc.contributor.author | Gerin, M. | - |
dc.contributor.author | Kramer, C. | - |
dc.contributor.author | Roueff, E. | - |
dc.contributor.author | Bachiller, R. | - |
dc.contributor.author | Commerçon, B. | - |
dc.contributor.author | Friesen, R. | - |
dc.contributor.author | García Burillo, S. | - |
dc.contributor.author | Goicoechea, J. R. | - |
dc.contributor.author | Giuliano, B. M. | - |
dc.contributor.author | Jiménez Serra, I. | - |
dc.contributor.author | Kirk, J. M. | - |
dc.contributor.author | Lattanzi, V. | - |
dc.contributor.author | Malinen, J. | - |
dc.contributor.author | Marcelino, N. | - |
dc.contributor.author | Martín Doménech, R. | - |
dc.contributor.author | Muñoz Caro, G. M. | - |
dc.contributor.author | Pineda, J. | - |
dc.contributor.author | Tercero, B. | - |
dc.contributor.author | Treviño Morales, S. P. | - |
dc.contributor.author | Roncero, O. | - |
dc.contributor.author | Tafalla, M. | - |
dc.contributor.author | Ward Thompson, D. | - |
dc.contributor.other | Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737 | - |
dc.date.accessioned | 2021-03-17T14:09:10Z | - |
dc.date.available | 2021-03-17T14:09:10Z | - |
dc.date.issued | 2020-05-12 | - |
dc.identifier.citation | Astronomy and Astrophysics 637: A39 (2020) | es |
dc.identifier.issn | 0004-6361 | - |
dc.identifier.other | https://www.aanda.org/articles/aa/abs/2020/05/aa37180-19/aa37180-19.html | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12666/112 | - |
dc.description | 21 pags., 16 figs., 7 tabs., 2 apps. | es |
dc.description.abstract | Context. Sulphur is one of the most abundant elements in the Universe. Surprisingly, sulphuretted molecules are not as abundant as expected in the interstellar medium and the identity of the main sulphur reservoir is still an open question. Aims. Our goal is to investigate the H2S chemistry in dark clouds, as this stable molecule is a potential sulphur reservoir. Methods. Using millimeter observations of CS, SO, H2S, and their isotopologues, we determine the physical conditions and H2S abundances along the cores TMC 1-C, TMC 1-CP, and Barnard 1b. The gas-grain model NAUTILUS is used to model the sulphur chemistry and explore the impact of photo-desorption and chemical desorption on the H2S abundance. Results. Our modeling shows that chemical desorption is the main source of gas-phase H2S in dark cores. The measured H2S abundance can only be fitted if we assume that the chemical desorption rate decreases by more than a factor of 10 when nH > 2 × 104. This change in the desorption rate is consistent with the formation of thick H2O and CO ice mantles on grain surfaces. The observed SO and H2S abundances are in good agreement with our predictions adopting an undepleted value of the sulphur abundance. However, the CS abundance is overestimated by a factor of 5-10. Along the three cores, atomic S is predicted to be the main sulphur reservoir. Conclusions. The gaseous H2S abundance is well reproduced, assuming undepleted sulphur abundance and chemical desorption as the main source of H2S. The behavior of the observed H2S abundance suggests a changing desorption efficiency, which would probe the snowline in these cold cores. Our model, however, highly overestimates the observed gas-phase CS abundance. Given the uncertainty in the sulphur chemistry, we can only conclude that our data are consistent with a cosmic elemental S abundance with an uncertainty of a factor of 10. | es |
dc.description.sponsorship | We thank the Spanish MINECO for funding support from AYA2016-75066-C2-1/2-P, AYA2017-85111P, and ERC under ERC-2013-SyG, G. A. 610256 NANOCOSMOS. JM acknowledges the support of ERC-2015-STG No. 679852 RADFEEDBACK. S.P.T.M. acknowledge to the European Union’s Horizon 2020 research and innovation program for funding support given under grant agreement No 639459 (PROMISE); With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737) | es |
dc.language.iso | eng | es |
dc.publisher | EDP Sciences | es |
dc.relation | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2017-85111-P/ES/EFECTOS DINAMICOS Y RADIATIVOS DE LAS ESTRELLAS MASIVAS EN EL MEDIO INTERESTELAR: IMAGENES ESPECTROSCOPICAS CON ALMA, SOFIA, IRAM-30M Y JWST/ | - |
dc.relation | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-75066-C2-1-P/ES/EVOLUCION FISICA Y QUIMICA DEL MEDIO INTERESTELAR, CIRCUNESTELAR, Y PLANETARIO/ | - |
dc.relation | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-75066-C2-2-P/ES/LA RELACION ENTRE DINAMICA Y QUIMICA: FORMACION DE ESTRELLAS Y PLANETAS/ | - |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | es |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | - |
dc.subject | Astrochemistry | es |
dc.subject | ISM: abundances | es |
dc.subject | ISM: kinematics and dynamics | es |
dc.subject | ISM: molecules | es |
dc.subject | Stars: formation | es |
dc.subject | Stars: low-mass | es |
dc.title | Gas phase Elemental abundances in Molecular cloudS (GEMS) II. On the quest for the sulphur reservoir in molecular clouds: the H2S case | es |
dc.type | info:eu-repo/semantics/article | es |
dc.contributor.orcid | Navarro Almaida, D. [0000-0002-8499-7447] | - |
dc.identifier.doi | 10.1051/0004-6361/201937180 | - |
dc.identifier.e-issn | 1432-0746 | - |
dc.contributor.funder | European Research Council (ERC) | - |
dc.contributor.funder | European Commission (EC) | - |
dc.contributor.funder | Agencia Estatal de Investigación (AEI) | - |
dc.description.peerreviewed | Peer review | es |
dc.type.hasVersion | info:eu-repo/semantics/publishedVersion | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | - |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/H2020/679852 | - |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/FP7/610256 | - |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/H2020/639459 | - |
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