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OPTICAL CONSTANTS AND BAND STRENGTHS OF CH4:C2H6 ICES IN THE NEAR- AND MID-INFRARED

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OPTICAL CONSTANTS AND BAND STRENGTHS OF CH4:C2H6 ICES IN THE NEAR- AND MID-INFRARED

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dc.contributor.author Molpeceres, German es_ES
dc.contributor.author Satorre, M. Á. es_ES
dc.contributor.author Ortigoso, Juan es_ES
dc.contributor.author Millán Verdú, Carlos es_ES
dc.contributor.author Escribano, Rafael es_ES
dc.contributor.author Mate, Belen es_ES
dc.date.accessioned 2020-04-17T12:49:22Z
dc.date.available 2020-04-17T12:49:22Z
dc.date.issued 2016 es_ES
dc.identifier.issn 0004-637X es_ES
dc.identifier.uri http://hdl.handle.net/10251/140880
dc.description.abstract [EN] We present a spectroscopic study of methane-ethane ice mixtures. We have grown CH4:C2H6 mixtures with ratios 3:1, 1:1, and 1:3 at 18 and 30 K, plus pure methane and ethane ices, and have studied them in the near-infrared (NIR) and mid-infrared (MIR) ranges. We have determined densities of all species mentioned above. For amorphous ethane grown at 18 and 30 K we have obtained a density of 0.41 and 0.54 g cm(-3), respectively, lower than a previous measurement of the density of the crystalline species, 0.719 g cm(-3). As far as we know this is the first determination of the density of amorphous ethane ice. We have measured band shifts of the main NIR methane and ethane features in the mixtures with respect to the corresponding values in the pure ices. We have estimated band strengths of these bands in the NIR and MIR ranges. In general, intensity decay in methane modes was detected in the mixtures, whereas for ethane no clear tendency was observed. Optical constants of the mixtures at 30 and 18 K have also been evaluated. These values can be used to trace the presence of these species in the surface of trans-Neptunian objects. Furthermore, we have carried out a theoretical calculation of these ice mixtures. Simulation cells for the amorphous solids have been constructed using a Metropolis Monte Carlo procedure. Relaxation of the cells and prediction of infrared spectra have been carried out at density functional theory level. es_ES
dc.description.sponsorship Funds have been provided for this research from the Spanish MINECO, Project FIS2013-48087-C2-1-P and FIS2013-48087-C2-2-P. G.M. acknowledges MINECO PhD grant BES-2014-069355. We are grateful to M. A. Moreno, J. Rodriguez, and I. Tanarro for technical help and to V. J. Herrero and I. Tanarro for discussions and manuscript preparation. es_ES
dc.language Inglés es_ES
dc.publisher American Astronomical Society es_ES
dc.relation MINECO/FIS2013-48087-C2-1-P es_ES
dc.relation MINECO/BES-2014-069355 es_ES
dc.relation MINECO/FIS2013-48087-C2-2-P es_ES
dc.relation.ispartof The Astrophysical Journal es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Methods: Laboratory: Molecular es_ES
dc.subject Planets and satellites: Composition es_ES
dc.subject Techniques: Spectroscopic es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.title OPTICAL CONSTANTS AND BAND STRENGTHS OF CH4:C2H6 ICES IN THE NEAR- AND MID-INFRARED es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.3847/0004-637X/825/2/156 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada es_ES
dc.description.bibliographicCitation Molpeceres, G.; Satorre, MÁ.; Ortigoso, J.; Millán Verdú, C.; Escribano, R.; Mate, B. (2016). OPTICAL CONSTANTS AND BAND STRENGTHS OF CH4:C2H6 ICES IN THE NEAR- AND MID-INFRARED. The Astrophysical Journal. 825(2). https://doi.org/10.3847/0004-637X/825/2/156 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.3847/0004-637X/825/2/156 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 825 es_ES
dc.description.issue 2 es_ES
dc.relation.pasarela S\326258 es_ES
dc.contributor.funder Ministerio de Economía y Competitividad es_ES


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