{"id":40634,"date":"1999-01-01T00:00:00","date_gmt":"1999-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/la-abundancia-de-hierro-en-regiones-hii-galacticas\/"},"modified":"1999-01-01T00:00:00","modified_gmt":"1999-01-01T00:00:00","slug":"la-abundancia-de-hierro-en-regiones-hii-galacticas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/astronomia-y-astrofisica\/la-abundancia-de-hierro-en-regiones-hii-galacticas\/","title":{"rendered":"La abundancia de hierro en regiones hii galacticas."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Monica Rodriguez Guillen <\/strong><\/h2>\n<p>En este trabajo se analiza la emisi\u00f3nde (fe ii) y (fe iii) en siete regiones h ii gala\u00e1cticas: m42, m43, m8, m16, m17, m20 y ngc 7635, usando para ello espectros en el rango landa landa 4200-8800 obtenidos en distintas zonas de cada objeto.  las l\u00edneas de emisi\u00f3n no pertenecientes a los iones del fe se usan para determinar las condiciones f\u00edsicas y las abundancias i\u00f3nicas de varios elementos en las zonas consideradas. las abundancias i\u00f3nicas resultantes, al estar refereidas a zonas caracterizadas por condiciones diferentes, permiten inferir que las abundancias totales de o, s, cl, n, ar y he deben ser iguales en todas las regiones h ii estudiadas dentro del rango de errores esperados.  el comportamiento de las intensidades relativas de las l\u00edneas de (fe ii) observadas en las distintas zonas, implica que los efectos de fluorescencia tienen un papel importante en su formaci\u00f3n, con lo cual no es necesario postular que la emisi\u00f3n de (fe ii) se origina en una zona de alta densidad, como han sugerido otros autores.  las abundancias de fe se calculan en todas las zonas utilizando exclusivamente las l\u00edneas de (fe iii) junto con factores de correcci\u00f3n por las contribuciones de fe+ y fe3+ basados en modelos de ionizaci\u00f3n existentes.  los valores obtenidos para fe\/h son entre 10 y 63 veces menores que la abundancia solar, lo que implica que la mayor parte del fe se encuentra depositado en el polvo en el interior de las regiones h ii. Adem\u00e1s, la abundancia de fe en el gas resulta estar correlacionada con el grado de ionizaci\u00f3n de la zona donde se mide. Esta correlaci\u00f3n se explica relacionando a los fotones energ\u00e9ticos con la liberaci\u00f3n de \u00e1tomos de fe del polvo. Por otra parte, los valores de fe\/h muestran cierta tendencia a disminuir con el exceso de color indicado por las intensidades relativas de las l\u00edneas de h i. este resultado podr\u00eda deberse a la acci\u00f3n de la presi\u00f3n de  radiaci\u00f3n o de los vien<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>La abundancia de hierro en regiones hii galacticas.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 La abundancia de hierro en regiones hii galacticas. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Monica Rodriguez Guillen <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 La laguna<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/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>Guido Munch<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: manuel Peimbert-sierra <\/li>\n<li>cesar Esteban lopez (vocal)<\/li>\n<li>enrique Perez jimenez (vocal)<\/li>\n<li>minia Manteiga outeiro (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Monica Rodriguez Guillen En este trabajo se analiza la emisi\u00f3nde (fe ii) y (fe iii) en siete [&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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