{"id":80780,"date":"2018-03-10T00:04:32","date_gmt":"2018-03-10T00:04:32","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/nlte-inversion-of-spectral-lines-and-stokes-profiles\/"},"modified":"2018-03-10T00:04:32","modified_gmt":"2018-03-10T00:04:32","slug":"nlte-inversion-of-spectral-lines-and-stokes-profiles","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/astronomia-y-astrofisica\/nlte-inversion-of-spectral-lines-and-stokes-profiles\/","title":{"rendered":"Nlte inversion of spectral lines and stokes profiles"},"content":{"rendered":"<h2>Tesis doctoral de <strong> H\u00e9ctor David Socas Navarro <\/strong><\/h2>\n<p>En la tesis se presenta un m\u00e9todo para la inversi\u00f3n de los perfiles de stokes de lineas espectrales para lasque la aproximaci\u00f3n de equilibrio termodin\u00e1mico local no es adecuada. Este m\u00e9todo es aplicado a observaciones espectro-polarim\u00e9tricas realizadas con vistas al estudio de la din\u00e1mica y el magnetismo de la cromosfera sobre laumbra de las manchas solares. bajo las suposiciones de atm\u00f3sfera unidimensional plano-paralela, redistribuci\u00f3n completa, y poblaciones calculadas despreciando efectos de polarizaci\u00f3n at\u00f3mica, el c\u00f3digo de inversi\u00f3n obtiene la estratificaci\u00f3n de la temperatura, densidad, velocidad, microturbulencia y vector campo magn\u00e9tico que de un mejor ajuste a los perfiles observados.  esta nueva herramienta de diagn\u00f3stico es aplicada a observaciones reales, esto es, series temporales de perfiles de stokes i y v emergentes de la umbra de una mancha solar. El an\u00e1lisis de estos datos revela un comportamiento, hasta ahora desconocido, de los perfiles de stokes v en las l\u00edneas cromosf\u00e9ricas. estos adoptan peri\u00f3dicamente una forma \u00abanomala\u00bb, fuertemente asim\u00e9trica, volviendo m\u00e1s tarde a su estado \u00abnormal\u00bb antisim\u00e9trico. Tras explorar varios escenarios posibles, se concluye que los perfiles an\u00f3malos est\u00e1n causados por la aparici\u00f3n de una componente atmosf\u00e9rica no resuelta que denotamos por \u00abactiva\u00bb, frente a la componente \u00abtranquila\u00bb que produce los perfiles normales. El estudio tambi\u00e9n revela que los destellos umbrales(uf por su designaci\u00f3n en ingles, \u00abumbral flashes\u00bb) que se ven en algunas manchas aparecen cuando la componente activa tiene un factor de llenado mayor. este resultado sugiere que el mecanismo fisico que produce los ufs en algunas manchas podr\u00eda estar, en realidad, funcionando en todas ellas. S\u00f3lo ser\u00edan detectables en stokes i (como emisiones en el centro de las l\u00edneas) cuando el factor de llenado fuese lo suficientemente grande. En otro caso s\u00f3lo ser\u00edan detectables como perfiles de s<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Nlte inversion of spectral lines and stokes profiles<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Nlte inversion of spectral lines and stokes profiles <\/li>\n<li><strong>Autor:<\/strong>\u00a0 H\u00e9ctor David Socas Navarro <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 La laguna<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 30\/09\/1999<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Javier Trujillo Bueno<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: fernando Moreno insertis <\/li>\n<li>robert Rutten (vocal)<\/li>\n<li>franz Kneer (vocal)<\/li>\n<li>frederic Paletou (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de H\u00e9ctor David Socas Navarro En la tesis se presenta un m\u00e9todo para la inversi\u00f3n de los perfiles [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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