{"id":29347,"date":"2018-03-09T09:22:26","date_gmt":"2018-03-09T09:22:26","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/study-of-envelopes-and-protoplanetary-disks-around-young-stars\/"},"modified":"2018-03-09T09:22:26","modified_gmt":"2018-03-09T09:22:26","slug":"study-of-envelopes-and-protoplanetary-disks-around-young-stars","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/study-of-envelopes-and-protoplanetary-disks-around-young-stars\/","title":{"rendered":"Study of envelopes and protoplanetary disks around young stars"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Bruno Mer\u00edn Mart\u00edn <\/strong><\/h2>\n<p>Se presenta una n\u00e1lisis de datos multirrango de estrellas de pre-secuencia principal (pms y ms en sus siglas en ingl\u00e9s). Este trabajo se encuadra dentro de la colaboraci\u00f3n internacional export, que tiene como objetivo el estudio observacional de la evoluci\u00f3n de los discos cirunestelares (cs) desde la fase pms hasta la fase de discos tipo-vega alrededor de estrellas ms. La mayor\u00eda de las observaciones analizadas en este trabajo fueron obtenidas por dicho grupo en el tiempo internacional de 1998 de los observatorios de las islas canarias.  las observaciones de 70 estrellas son procesadas homog\u00e9neamente y se presentan como un cat\u00e1logo de estrellas con exceso infrarrojo (ir) y distintos estados evolutivos. El primer paso es la clasificaci\u00f3n espectral de las estrellas de la muestra con espectros \u00f3pticos de export. El segundo es la construcci\u00f3n de las distribuciones espectrales de energ\u00eda (sed en sus siglas en ingl\u00e9s) con fotometr\u00eda simult\u00e1nea en \u00f3ptico y cercano ir de export m\u00e1s datos desde el ultravioleta hasta radio tomadas de archivos de sat\u00e9lites cient\u00edficos y de la literatura. Presentamos las seds m\u00e1s completa sdisponibles para muchas de las estrellas de la muestra. Calculamos los excesos ir de la muestra y se\u00f1alamos los objetos cuyas seds pueden estar afectadas por binarias no resueltas o emisi\u00f3n ir de fondo. Encontramos cuatro grupos de estrellas con distribuciones de energ\u00eda muy parecidas, lo que apunta a similitudes en sus discos cs. M\u00e1s a\u00fan, encontramos parecidos entre las seds de estrellas con discos cs bien conocidos y otras a\u00fan no observadas con alta resoluci\u00f3n espacial. Determinamos los par\u00e1metros estelares de las estrellas pms de la muestra coloc\u00e1ndolas en un diagrama hr y confirmamos su naturaleza pre-secuencia principal. No se observa ninguna tendencia de los excesos ir de las estrellas pms de la muestra con la edad.  para analizar las seds de las estrellas pms usamos los modelos f\u00edsicos de disco<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Study of envelopes and protoplanetary disks around young stars<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Study of envelopes and protoplanetary disks around young stars <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Bruno Mer\u00edn Mart\u00edn <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 24\/03\/2004<\/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>Benjam\u00edn Montesinos Comino<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: josep Mar\u00eda Torrelles arnedo <\/li>\n<li> G\u00f3mez rivero Jos\u00e9 Francisco (vocal)<\/li>\n<li>matilde Fern\u00e1ndez hern\u00e1ndez (vocal)<\/li>\n<li>Luis Miranda palacios (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Bruno Mer\u00edn Mart\u00edn Se presenta una n\u00e1lisis de datos multirrango de estrellas de pre-secuencia principal (pms 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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