{"id":18886,"date":"2019-01-22T09:45:43","date_gmt":"2019-01-22T12:45:43","guid":{"rendered":"http:\/\/www.astrofisicamas.cl\/?p=18886"},"modified":"2024-08-07T19:34:26","modified_gmt":"2024-08-07T19:34:26","slug":"investigador-del-mas-lidera-censo-mas-completo-de-estrellas-de-la-via-lactea","status":"publish","type":"post","link":"https:\/\/astrofisicamas.cl\/en\/investigador-del-mas-lidera-censo-mas-completo-de-estrellas-de-la-via-lactea\/","title":{"rendered":"Investigador del MAS lidera censo m\u00e1s completo de estrellas de la V\u00eda L\u00e1ctea"},"content":{"rendered":"<h4 style=\"text-align: center;\"><strong><em>La investigaci\u00f3n logr\u00f3 caracterizar alrededor de mil millones de estrellas del centro de la galaxia<\/em><\/strong><\/h4>\n<p><!--more--><\/p>\n<p>Un grupo de investigadores, utilizando datos de la encuesta VVV, <strong>elabor\u00f3 el censo de estrellas m\u00e1s completo de las regiones internas de la V\u00eda L\u00e1ctea, el que incluye casi mil millones de estrellas de las regiones centrales<\/strong>. La investigaci\u00f3n fue liderada por el investigador del <strong>Instituto Milenio de Astrof\u00edsica Javier Alonso-Garc\u00eda, y en ella tambi\u00e9n participaron los investigadores Dante Minnitti, Joyce Pullen, M\u00e1rcio Catelan, Rodrigo Contreras y Manuela Zoccali.<\/strong><\/p>\n<p>Las estrellas se detectaron y caracterizaron en brillo y color gracias a observaciones realizadas en infrarrojo, utilizando el telescopio VISTA, del Observatorio Europeo Austral que est\u00e1 instalado en el norte de Chile. Este telescopio observa la luz de las estrellas en ese rango de longitud de onda, lo que le permite atravesar las densas nubes de gas y polvo que, a modo de una espesa niebla, no permiten ver la luz proveniente desde el bulbo y el disco interno de la V\u00eda L\u00e1ctea.<\/p>\n<p>La investigaci\u00f3n surgi\u00f3 dentro de la colaboraci\u00f3n VVV (Vista Variables in the V\u00eda L\u00e1ctea <em>survey<\/em>) con el fin de analizar mejor sus im\u00e1genes con fotometr\u00eda PSF, una t\u00e9cnica que est\u00e1 dise\u00f1ada para detectar y extraer informaci\u00f3n de las fuentes que se encuentran en campos con grandes densidades de estrellas, como es el caso de las regiones centrales de la V\u00eda L\u00e1ctea. \u201cNuestro trabajo analiza todas las regiones observadas por el VVV, en cada uno de los cinco filtros infrarrojos usados, y en dos \u00e9pocas por filtro. Esto representa extraer la fotometr\u00eda de m\u00e1s de 300.000 im\u00e1genes, lo que hicimos gracias a las capacidades de Geryon, el potente <em>cluster<\/em> de computaci\u00f3n para astronom\u00eda que se encuentra en el Instituto de Astrof\u00edsica de la Pontificia Universidad Cat\u00f3lica de Chile\u201d, destaca Javier Alonso-Garc\u00eda, quien tambi\u00e9n es investigador de la Universidad de Antofagasta.<\/p>\n<p><strong>\u201cEste cat\u00e1logo nos permite separar mejor los distintos tipos de poblaciones estelares de estas regiones, a fin de comprender mejor sus caracter\u00edsticas. Dentro de la colaboraci\u00f3n ya hemos empezado a explotar cient\u00edficamente este cat\u00e1logo, que nos ha permitido objetivos tan diversos como estimar emp\u00edricamente la masa estelar del bulbo de la V\u00eda L\u00e1ctea, caracterizar mejor la forma en X del bulbo, o evaluar con mayor precisi\u00f3n la ley de extinci\u00f3n de la luz hacia esas zonas\u201d, destaca el cient\u00edfico.<\/strong><\/p>\n<p>A este cat\u00e1logo puede acceder toda la comunidad cient\u00edfica, lo que, seg\u00fan Alonso-Garc\u00eda, facilita que sea utilizado en estudios que permitan comprender mejor nuestra galaxia.<\/p>\n<p>Sobre el trabajo a futuro, los investigadores indican que piensan extender el an\u00e1lisis a las regiones estudiadas por el VVVx, la extensi\u00f3n del VVV que observa un \u00e1rea tres veces mayor, cubriendo todo el disco gal\u00e1ctico observable desde el hemisferio sur, as\u00ed como las regiones m\u00e1s externas del bulbo de la V\u00eda L\u00e1ctea.<\/p>","protected":false},"excerpt":{"rendered":"<p>La investigaci\u00f3n logr\u00f3 caracterizar alrededor de mil millones de estrellas del centro de la galaxia<\/p>","protected":false},"author":3,"featured_media":18888,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_eb_attr":"","footnotes":""},"categories":[23],"tags":[],"class_list":["post-18886","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticias"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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