{"id":3236,"date":"2014-10-06T16:10:53","date_gmt":"2014-10-06T19:10:53","guid":{"rendered":"http:\/\/www.astrofisica.cl\/?p=3236"},"modified":"2024-08-16T17:35:44","modified_gmt":"2024-08-16T17:35:44","slug":"confirman-presencia-de-nubes-de-hielo-en-enana-cafe","status":"publish","type":"post","link":"https:\/\/astrofisicamas.cl\/en\/confirman-presencia-de-nubes-de-hielo-en-enana-cafe\/","title":{"rendered":"Confirman presencia de \u201cnubes de hielo\u201d en enana caf\u00e9"},"content":{"rendered":"<h4 style=\"text-align: center;\"><strong><i>Hace algunas semanas un grupo de investigadores del Carnegie Institution for Science in Washington encontraron indicios de que WISE J0855-0714, la enana caf\u00e9 m\u00e1s fr\u00eda descubierta hasta ahora, estaba rodeada por una nube de hielo, conclusiones que fueron corroboradas por un grupo de astr\u00f3nomos pertenecientes a MAS y cuyos resultados fueron publicado en Astronomy &amp; Astrophysics Letters.\u00a0<\/i><\/strong><!--more--><\/h4>\n<p>WISE J0855-0714 fue descubierta reci\u00e9n a principios de este a\u00f1o, sorprendiendo a la comunidad astron\u00f3mica internacional, por ser el objeto m\u00e1s fr\u00edo encontrado hasta ahora, a \u201cs\u00f3lo\u201d 7.3 a\u00f1os luz de la Tierra. Esta enana caf\u00e9, denominada as\u00ed por ser demasiado peque\u00f1a para producir reacciones nucleares en su n\u00facleo y ser llamada una estrella, fue descubierta por Kevin Luhman, astr\u00f3nomo de la Pennsylvania State University usando im\u00e1genes del telescopio espacial infrarrojo WISE de la NASA.<\/p>\n<p>S\u00f3lo hace algunas semanas, <strong>Jaqueline Faherty, astr\u00f3noma del Carnegie Institution for Science in Washington<\/strong> descubri\u00f3 que este objeto estaba rodeado de nubes de hielo, <strong>la primera evidencia de nubes de agua fuera de nuestro sistema solar. Este hallazgo fue corroborado por las observaciones de un grupo de investigadores nacionales, liderados por expertos del Instituto Milenio de Astrof\u00edsica.<\/strong><\/p>\n<p>\u201cLo que nosotros hicimos fue observar este mismo objeto antes estudiado, pero con un filtro m\u00e1s hacia el azul usando el Very Large Telescope (VLT). <strong>Nos sorprendi\u00f3 que ah\u00ed donde tendr\u00eda que haber estado no lo encontramos, lo que nos indica que la conclusi\u00f3n de que estaba rodeado de nubes de hielo era correcta.<\/strong> A pesar de ser tan cercano a la Tierra, la dificultad en observarlo radica en su muy baja temperatura (menor que -20C) la cual permite la formaci\u00f3n de dichas nubes de agua\u201d, se\u00f1ala <strong>Juan Carlos Beamin, astr\u00f3nomo del MAS y del European Southern Observatory (ESO) quien fue parte de esta investigaci\u00f3n.\u00a0<\/strong><\/p>\n<p>Seg\u00fan Beamin, el principal aporte de este nuevo estudio es que caracteriza a\u00fan m\u00e1s a WISE J0855-0714 lo que permitir\u00e1 en el futuro poder contrastar modelos de estrellas y enanas marrones fr\u00edas con datos reales. \u201cHasta este momento, los astr\u00f3nomos elaboraban modelos para objetos muy fr\u00edos, pero no ten\u00edan datos para comprobar si estos eran correctos. En estos momentos, mientras m\u00e1s sepamos de WISE J0855-0714 m\u00e1s podemos saber c\u00f3mo se comportan estos modelos y es por eso que lo que estamos haciendo es aportar cada vez m\u00e1s detalles de este objeto\u201d, concluye.<\/p>\n<p><strong>En esta investigaci\u00f3n colaboraron los investigadores del MAS Juan Carlos Beamin, Dante Minniti, Radostin Kurtev, Mariusz Gromadzki y Ren\u00e9 M\u00e9ndez<\/strong>, adem\u00e1s de investigadores del Instituto Max Planck de Alemania, el Instituto de F\u00edsica y Astronom\u00eda de la Universidad de Valpara\u00edso, del CNRS de la Universidad de Lyon, del Instituto de Astrof\u00edsica de Canarias, del Departamento de Astrof\u00edsica de la Universidad de la Laguna y del Centro de Astrobiolog\u00eda de Espa\u00f1a.<\/p>\n<p>Paper completo en el siguiente link\u00a0<a href=\"http:\/\/arxiv.org\/abs\/1408.5424\" target=\"_blank\" rel=\"noopener\">http:\/\/arxiv.org\/abs\/1408.5424<\/a>[:]<\/p>","protected":false},"excerpt":{"rendered":"<p>Hace algunas semanas un grupo de investigadores del Carnegie Institution for Science in Washington encontraron indicios de que WISE J0855-0714, la enana caf\u00e9 m\u00e1s fr\u00eda descubierta hasta ahora, estaba rodeada por una nube de hielo, conclusiones que fueron corroboradas por un grupo de astr\u00f3nomos pertenecientes a MAS y cuyos resultados&#8230;<\/p>","protected":false},"author":1,"featured_media":14461,"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-3236","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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