{"id":15902,"date":"2017-07-05T08:04:34","date_gmt":"2017-07-05T12:04:34","guid":{"rendered":"http:\/\/www.astrofisicamas.cl\/?p=15902"},"modified":"2023-08-07T18:39:01","modified_gmt":"2023-08-07T18:39:01","slug":"nuestra-investigacion-la-conexion-entre-supernovas-explosiones-de-rayos-gamma-y-magnetares","status":"publish","type":"post","link":"https:\/\/astrofisicamas.cl\/en\/nuestra-investigacion-la-conexion-entre-supernovas-explosiones-de-rayos-gamma-y-magnetares\/","title":{"rendered":"Nuestra investigaci\u00f3n: La conexi\u00f3n entre supernovas, explosiones de rayos gamma y magnetares"},"content":{"rendered":"<h4 data-fontsize=\"16\" data-lineheight=\"17\"><em><strong>or Felipe Olivares, <\/strong><\/em><em><strong>investigador postdoctoral MAS<\/strong><\/em><\/h4>\n<p><!--more--><\/p>\n<p>Desde el emblem\u00e1tico caso de SN 1998bw (asociado al GRB 980425), las\u00a0 asociaciones entre explosiones de rayos gamma (GRBs, por sus siglas en ingl\u00e9s) y supernovas (SNs) han intrigado a los astr\u00f3nomos. La evidencia sugiere que estas explosiones monstruosas son el resultado del colapso del n\u00facleo\u00a0 de estrellas muy masivas (m\u00e1s de 8 masas solares). El colapso del n\u00facleo estelar da origen a un remanente compacto, ya sea una estrella de neutrones (NS, por sus siglas en ingl\u00e9s) o un agujero negro. Si el n\u00facleo de la estrella progenitora gira lo suficientemente r\u00e1pido al momento del colapso, la SN ser\u00e1 precedida por un GRB. Se ha argumentado que el remanente compacto en estos casos podr\u00eda ser una NS de rotaci\u00f3n\u00a0 r\u00e1pida y fuerte magnetizaci\u00f3n, denominada \u00abmagnetar\u00bb.<\/p>\n<p>De hecho, se ha propuesto la hip\u00f3tesis de que un magnetar es el responsable de la alta\u00a0 luminosidad de la SN 2011kl asociada con el GRB 111209A. En un estudio ya publicado (<a href=\"http:\/\/adsabs.harvard.edu\/abs\/2015Natur.523..189G\">http:\/\/adsabs.harvard.edu\/abs\/2015Natur.523..189G<\/a>), encontramos pruebas que demostraron por primera vez que esta SN de alta luminosidad fue alimentada por un magnetar (ver nuestros resultados m\u00e1s recientes en <a href=\"https:\/\/arxiv.org\/abs\/1606.06791v2\">https:\/\/arxiv.org\/abs\/1606.06791v2<\/a> ). SN2011kl fue m\u00e1s brillante que cualquier otra GRB-SN descubierta a la fecha. Su luminosidad estaba m\u00e1s cerca de las SNs s\u00faper luminosas (SL-SNs por sus siglas en ingl\u00e9s, vea la figura 2).<\/p>\n<p>Esta evidencia no s\u00f3lo presenta nuevas oportunidades en astrof\u00edsica con magnetares como fuente de energ\u00eda de GRB- y SL-SNs, sino que tambi\u00e9n abre una ventana para explorar el uso estos eventos muy brillantes para examinar la expansi\u00f3n acelerada del universo hasta grandes distancias cosmol\u00f3gicas.<\/p>\n<p><em>Figura 1: Impresi\u00f3n art\u00edstica de una explosi\u00f3n de rayos gamma y supernova accionada por un magnetar. (Cr\u00e9dito: ESO)<\/em><\/p>\n<figure id=\"attachment_15904\" aria-describedby=\"caption-attachment-15904\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.astrofisicamas.cl\/wp-content\/uploads\/2017\/07\/2017_07_05_FOlivares2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-15904 size-large\" src=\"http:\/\/www.astrofisicamas.cl\/wp-content\/uploads\/2017\/07\/2017_07_05_FOlivares2-1024x729.jpg\" alt=\"\" width=\"1024\" height=\"729\" \/><\/a><figcaption id=\"caption-attachment-15904\" class=\"wp-caption-text\">Luminosidad de la SN versus desplazamiento cosmol\u00f3gico hacia el rojo (\u201credshift\u201d, indicado por la letra z en el eje horizontal). En otras palabras, la luminosidad de varias SNs de colapso gravitatorio como funci\u00f3n de la escala de expansi\u00f3n cosmol\u00f3gica. Se muestra que SN 2011kl se aproxima a la luminosidad de las SL-SNe. Note, adem\u00e1s, que las SNs asociadas con magnetares forman una secuencia menos dispersa que las SL-SNe. Con estos eventos ultra brillantes, podemos investigar la expansi\u00f3n del universo hasta un redshift de aproximadamente 1, lo que permitir\u00e1 el c\u00e1lculo de par\u00e1metros cosmol\u00f3gicos tales como la densidad de materia y de energ\u00eda oscura del universo.<\/figcaption><\/figure>","protected":false},"excerpt":{"rendered":"<p>or Felipe Olivares, investigador postdoctoral MAS<\/p>","protected":false},"author":3,"featured_media":29234,"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":[59],"tags":[],"class_list":["post-15902","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-columnas"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nuestra investigaci\u00f3n: La conexi\u00f3n entre supernovas, explosiones de rayos gamma y magnetares - 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