Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/57432
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dc.contributor.authorEspinosa Vivas, Guadalupeen_US
dc.contributor.authorRodríguez Pérez, Rafaelen_US
dc.contributor.authorGil, Juan Miguelen_US
dc.date.accessioned2019-10-23T14:02:19Z-
dc.date.available2019-10-23T14:02:19Z-
dc.date.issued2019en_US
dc.identifier.issn0022-4073en_US
dc.identifier.otherWoS-
dc.identifier.urihttp://hdl.handle.net/10553/57432-
dc.description.abstractThe resolution of the radiative transfer equation in radiation-hydrodynamic simulations of astrophysical plasmas require radiative opacities. In this work, an analysis of the monochromatic and multigroup opacities of an astrophysical plasma mixture has been carried out. The study has been made in ranges of electron temperatures and densities of 1−1000 eV and 1011−1020 cm−3, respectively, a wide range of plasma conditions that can be found in several astrophysical scenarios where local and non-local thermodynamic regimes are attained. Collisional-radiative calculations were performed to obtain the plasma level populations and the monochromatic opacities in that range of plasma conditions, covering both thermodynamic regimes. Since the astrophysical mixture includes chemical elements from hydrogen to iron, their contribution to the total opacity will depend on the plasma conditions and we have made a characterization of their contribution as a function of the electron density and temperature and also of the photon frequency. Multigroup and gray approaches are commonly used in the radiative transfer equation in radiation-hydrodynamic calculations. We have analyzed the influence of the number of the groups in the accuracy of the multigroup opacities and we have showed that, for a given plasma condition, the opacity of the multicomponent plasma in the gray approach may be considerably influenced by only some of the contributing elements, due to the influence of the weighting function in the mean, which can lead to great differences with respect to the monochromatic opacity. Finally, since there are situations in which the self-absorption of the plasma radiation becomes relevant due to the dimensions of the plasma, we have performed an analysis of the influence of the radiation trapping in the monochromatic and multigroup opacities in terms of the plasma conditions and the width of the plasma slab, assuming the plasma with planar geometry and we have also studied the departures of the local thermodynamic regime.en_US
dc.languageengen_US
dc.relationDesarrollo de Modelos Físicos y Su Integración Computacional Para la Descripción Microscópica de Plasmas Deen_US
dc.relation.ispartofJournal of Quantitative Spectroscopy and Radiative Transferen_US
dc.sourceJournal of Quantitative Spectroscopy and Radiative Transfer [ISSN 0022-4073], v. 237 (106633)en_US
dc.subject220410 Física de plasmasen_US
dc.subject.otherMonochromatic and multigroup opacitiesen_US
dc.subject.otherNon-local thermodynamic equilibriumen_US
dc.subject.otherPlasma self-absorptionen_US
dc.subject.otherAstrophysical plasmasen_US
dc.titleAnalysis of radiative opacities for optically thin and thick astrophysical plasmasen_US
dc.typeinfo:eu-repo/semantics/articleen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.jqsrt.2019.106633en_US
dc.identifier.scopus85071975535-
dc.identifier.isi000491676000015-
dc.contributor.authorscopusid55285592600-
dc.contributor.authorscopusid56314921800-
dc.contributor.authorscopusid55566759900-
dc.identifier.eissn1879-1352-
dc.identifier.issue106633-
dc.relation.volume237en_US
dc.investigacionCienciasen_US
dc.type2Artículoen_US
dc.contributor.daisngid13599639-
dc.contributor.daisngid799688-
dc.contributor.daisngid292327-
dc.description.numberofpages17en_US
dc.utils.revisionen_US
dc.contributor.wosstandardWOS:Espinosa, G-
dc.contributor.wosstandardWOS:Rodriguez, R-
dc.contributor.wosstandardWOS:Gil, JM-
dc.date.coverdateNoviembre 2019en_US
dc.identifier.ulpgces
dc.description.sjr0,888
dc.description.jcr3,047
dc.description.sjrqQ1
dc.description.jcrqQ1
dc.description.scieSCIE
item.fulltextSin texto completo-
item.grantfulltextnone-
crisitem.author.deptInteracción Radiación-Materia-
crisitem.author.deptIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.deptFísica-
crisitem.author.deptInteracción Radiación-Materia-
crisitem.author.deptIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.deptFísica-
crisitem.author.deptInteracción Radiación-Materia-
crisitem.author.deptIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.deptFísica-
crisitem.author.orcid0000-0002-8326-3169-
crisitem.author.orcid0000-0001-9006-4128-
crisitem.author.parentorgIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.parentorgIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.parentorgIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.fullNameEspinosa Vivas, Guadalupe-
crisitem.author.fullNameRodríguez Pérez, Rafael-
crisitem.author.fullNameGil De La Fe, Juan Miguel-
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