{"id":133007,"date":"1997-01-01T00:00:00","date_gmt":"1997-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/applications-of-timelike-and-null-congruences-to-the-construction-of-cosmological-and-astrophysical-models\/"},"modified":"1997-01-01T00:00:00","modified_gmt":"1997-01-01T00:00:00","slug":"applications-of-timelike-and-null-congruences-to-the-construction-of-cosmological-and-astrophysical-models","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/applications-of-timelike-and-null-congruences-to-the-construction-of-cosmological-and-astrophysical-models\/","title":{"rendered":"Applications of timelike and null congruences to the construction of cosmological and astrophysical models."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Carlos Fernandez Sopuerta <\/strong><\/h2>\n<p>La presente tesis doctoral consiste en la aplicacion del estudio de congruencias temporales y luminosas a la construccion de modelos cosmologicos y astrofisicos dentro del marco de la relatividad general.En el capitulo 2 se realiza un amplio estudio de las congruencias temporales, con el cual, en el capitulo 3 se estudia la conjetura sobre fluidos perfectos sin distorsion que afirma que o bien el fluido no se expande, o bien es irrotacional; y en el capitulo 4 se estudian los universos silenciosos, modelos introducidos para describir la formacion de estructuras en el universo.En el capitulo 5 se da una descripcion de las congruencias luminosas y se expone el formalismo de newman-penrose.  con esto, en el capitulo 6 se estudia exhaustivamente la transformacion de kerr-schild generalizada y su aplicacion a fluidos perfectos. Este estudio se ha utilizado para obtener nuevas soluciones de las ecuaciones de einstein. De esta manera, en el capitulo 7 se obtienen nuevos modelos cosmologicos (en general solo tienen un campo de killing), y en el capitulo 8, se han obtenido nuevas soluciones estacionarias (de tipo ii de petrov y general sin ninguna simetria adicional) con un contenido energetico-material de fluido perfecto y tambien de fluido perfecto con campo electromagnetico.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Applications of timelike and null congruences to the construction of cosmological and astrophysical models.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Applications of timelike and null congruences to the construction of cosmological and astrophysical models. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Carlos Fernandez Sopuerta <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1997<\/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>Jos\u00e9 Mar\u00eda Mart\u00edn Senovilla<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jes\u00fas Martin Martin <\/li>\n<li>LLuis Mas Franch (vocal)<\/li>\n<li>Dietrich Kramer (vocal)<\/li>\n<li>Jes\u00fas Iba\u00f1ez Medrano (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Carlos Fernandez Sopuerta La presente tesis doctoral consiste en la aplicacion del estudio de congruencias temporales y [&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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