{"id":1752078,"date":"2023-07-16T23:04:45","date_gmt":"2023-07-16T22:04:45","guid":{"rendered":"https:\/\/www.pressenza.com\/?p=1752078"},"modified":"2023-07-16T23:04:45","modified_gmt":"2023-07-16T22:04:45","slug":"nuevo-hallazgo-del-james-webb-podria-revelar-la-naturaleza-de-la-materia-oscura","status":"publish","type":"post","link":"https:\/\/www.pressenza.com\/es\/2023\/07\/nuevo-hallazgo-del-james-webb-podria-revelar-la-naturaleza-de-la-materia-oscura\/","title":{"rendered":"Nuevo hallazgo del James Webb podr\u00eda revelar la naturaleza de la materia oscura"},"content":{"rendered":"<p style=\"padding-left: 40px;\"><em>El telescopio espacial ha detectado varios objetos c\u00f3smicos que podr\u00edan ser las primeras \u00abestrellas oscuras\u00bb jam\u00e1s observadas.<\/em><\/p>\n<p>Un grupo de astrof\u00edsicos\u00a0<a href=\"https:\/\/www.eurekalert.org\/news-releases\/995502\" target=\"_blank\" rel=\"noopener noreferrer\">encontr\u00f3<\/a>\u00a0tres objetos estelares brillantes con el telescopio espacial James Webb (JWST, por sus siglas en ingl\u00e9s) que posiblemente sean \u00abestrellas oscuras\u00bb.\u00a0<strong>Te\u00f3ricamente, estos cuerpos grandes y brillantes est\u00e1n alimentados por part\u00edculas de materia oscura<\/strong>. De confirmarse, el hallazgo podr\u00eda revelar la naturaleza de la materia oscura, uno de los problemas sin resolver m\u00e1s profundos de toda la f\u00edsica contempor\u00e1nea.<\/p>\n<div class=\"ReadMore-root Section-root Section-is1to3-xs_is1to1\" data-widgets=\"ReadMore\">\n<div class=\"Section-container Section-isRow-isTop-isWrap\">\n<article class=\"Card-root Card-is1to1 \">\n<div class=\"Card-imageWrap\">\n<div class=\"Card-picture\"><picture class=\"Picture-root Picture-default\"><source srcset=\" \nhttps:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64a04488e9ff71482644a2cc.jpg 850w,\n                https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/article\/64a04488e9ff71482644a2cc.jpg 1960w,\n            \" media=\"(-webkit-min-device-pixel-ratio: 2) and (min-resolution: 120dpi)\" sizes=\"280px\" data-srcset=\"\n                https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64a04488e9ff71482644a2cc.jpg 850w,\n                https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/article\/64a04488e9ff71482644a2cc.jpg 1960w,\n            \" \/><source srcset=\" \nhttps:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64a04488e9ff71482644a2cc.jpg 460w,\n              https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/article\/64a04488e9ff71482644a2cc.jpg 980w,\n            \" sizes=\"280px\" data-srcset=\"\n              https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64a04488e9ff71482644a2cc.jpg 460w,\n              https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/article\/64a04488e9ff71482644a2cc.jpg 980w,\n            \" \/><img loading=\"lazy\" decoding=\"async\" class=\"Picture-root Picture-default lazyautosizes lazyloaded\" src=\"https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64a04488e9ff71482644a2cc.jpg\" sizes=\"auto, 280px\" alt=\"SpaceX lanza el telescopio Euclid, que explorar\u00e1 el lado oscuro del universo (VIDEO)\" width=\"504\" height=\"282\" data-sizes=\"auto\" data-src=\"https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64a04488e9ff71482644a2cc.jpg\" \/><\/picture><\/div>\n<\/div>\n<div class=\"Card-contentWrap\">\n<div class=\"Card-content\">\n<div class=\"Card-title\">\n<div class=\"HeaderNews-root HeaderNews-type_6 \"><a class=\"Link-root Link-isFullCard \" href=\"https:\/\/actualidad.rt.com\/actualidad\/471918-spacex-lanza-telescopio-euclid-explorar-universo\">SpaceX lanza el telescopio Euclid, que explorar\u00e1 el lado oscuro del universo (VIDEO)<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<h3><strong>Las tres candidatas<\/strong><\/h3>\n<p>Las tres estrellas oscuras candidatas (JADES-GS-z13-0, JADES-GS-z12-0 y JADES-GS-z11-0) fueron identificadas en diciembre de 2022 por el JWST.\u00a0<strong>Su dataci\u00f3n las ubica entre 320 millones a 400 millones de a\u00f1os despu\u00e9s del Big Bang<\/strong>, lo que las convierte en unos de\u00a0los objetos m\u00e1s antiguos jam\u00e1s vistos.<\/p>\n<p>\u00abCuando miramos los datos de James Webb, hay dos posibilidades en disputa para estos objetos\u00bb, coment\u00f3 Katherine Freese, directora del Instituto Weinberg de F\u00edsica Te\u00f3rica en EE.UU. y una de las cient\u00edficas que hizo el descubrimiento. \u00abUna es que son galaxias que contienen millones de estrellas ordinarias de poblaci\u00f3n III. La otra es que son estrellas oscuras. Y lo creas o no,\u00a0<strong>una estrella oscura tiene suficiente luz para competir con toda una galaxia de estrellas<\/strong>\u00ab, explic\u00f3. En teor\u00eda, las estrellas oscuras podr\u00edan crecer hasta tener varios millones de veces la masa del Sol y ser 10.000 millones de veces m\u00e1s brillantes.<\/p>\n<div class=\"ReadMore-root Section-root Section-is1to3-xs_is1to1\" data-widgets=\"ReadMore\">\n<div class=\"Section-container Section-isRow-isTop-isWrap\">\n<article class=\"Card-root Card-is1to1 \">\n<div class=\"Card-imageWrap\">\n<div class=\"Card-picture\"><picture class=\"Picture-root Picture-default\"><source srcset=\" \nhttps:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64ad307fe9ff7145136d0f62.jpg 850w,\n                https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/article\/64ad307fe9ff7145136d0f62.jpg 1960w,\n            \" media=\"(-webkit-min-device-pixel-ratio: 2) and (min-resolution: 120dpi)\" sizes=\"280px\" data-srcset=\"\n                https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64ad307fe9ff7145136d0f62.jpg 850w,\n                https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/article\/64ad307fe9ff7145136d0f62.jpg 1960w,\n            \" \/><source srcset=\" \nhttps:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64ad307fe9ff7145136d0f62.jpg 460w,\n              https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/article\/64ad307fe9ff7145136d0f62.jpg 980w,\n            \" sizes=\"280px\" data-srcset=\"\n              https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64ad307fe9ff7145136d0f62.jpg 460w,\n              https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/article\/64ad307fe9ff7145136d0f62.jpg 980w,\n            \" \/><img loading=\"lazy\" decoding=\"async\" class=\"Picture-root Picture-default lazyautosizes lazyloaded\" src=\"https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64ad307fe9ff7145136d0f62.jpg\" sizes=\"auto, 280px\" alt=\"Este video permite un viaje alrededor de casi 5.000 galaxias observadas por el James Webb\" width=\"535\" height=\"299\" data-sizes=\"auto\" data-src=\"https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.07\/thumbnail\/64ad307fe9ff7145136d0f62.jpg\" \/><\/picture><\/div>\n<\/div>\n<div class=\"Card-contentWrap\">\n<div class=\"Card-content\">\n<div class=\"Card-title\">\n<div class=\"HeaderNews-root HeaderNews-type_6 \"><a class=\"Link-root Link-isFullCard \" href=\"https:\/\/actualidad.rt.com\/actualidad\/472900-video-3d-permite-viaje-alrededor-5000-galaxias\">Este video permite un viaje alrededor de casi 5.000 galaxias observadas por el James Webb<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<h3><strong>Resolviendo viejos problemas y contradicciones<\/strong><\/h3>\n<p>\u00abDescubrir un nuevo tipo de estrella es bastante interesante en s\u00ed mismo, pero descubrir que es la materia oscura la que est\u00e1 impulsando esto ser\u00eda enorme\u00bb, se\u00f1al\u00f3 Freese. La identificaci\u00f3n de estrellas oscuras supermasivas\u00a0<strong>abrir\u00eda la posibilidad de aprender sobre la materia oscura a partir de las propiedades observadas<\/strong>. Confirmar la existencia de estrellas oscuras tambi\u00e9n podr\u00eda ayudar a solucionar la aparente contradicci\u00f3n entre la abundancia de grandes galaxias demasiado temprano en el universo detectadas por el James Webb y las predicciones del modelo est\u00e1ndar de cosmolog\u00eda.<\/p>\n<p>\u00abEs m\u00e1s probable que haya que ajustar algo dentro del modelo est\u00e1ndar, porque proponer algo completamente nuevo, como hicimos nosotros, siempre es menos probable\u00bb, apunt\u00f3 Freese. \u00abPero si algunos de estos objetos que parecen galaxias tempranas son en realidad estrellas oscuras,\u00a0<strong>las simulaciones de formaci\u00f3n de galaxias concuerdan mejor con las observaciones<\/strong>\u00ab, concluy\u00f3.<\/p>\n<div class=\"ReadMore-root Section-root Section-is1to3-xs_is1to1\" data-widgets=\"ReadMore\">\n<div class=\"Section-container Section-isRow-isTop-isWrap\">\n<article class=\"Card-root Card-is1to1 \">\n<div class=\"Card-imageWrap\">\n<div class=\"Card-picture\"><picture class=\"Picture-root Picture-default\"><source srcset=\" \nhttps:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.06\/thumbnail\/64931f10e9ff715c98108f0a.jpg 850w,\n                https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.06\/article\/64931f10e9ff715c98108f0a.jpg 1960w,\n            \" media=\"(-webkit-min-device-pixel-ratio: 2) and (min-resolution: 120dpi)\" sizes=\"280px\" data-srcset=\"\n                https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.06\/thumbnail\/64931f10e9ff715c98108f0a.jpg 850w,\n                https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.06\/article\/64931f10e9ff715c98108f0a.jpg 1960w,\n            \" \/><source srcset=\" \nhttps:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.06\/thumbnail\/64931f10e9ff715c98108f0a.jpg 460w,\n              https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.06\/article\/64931f10e9ff715c98108f0a.jpg 980w,\n            \" sizes=\"280px\" data-srcset=\"\n              https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.06\/thumbnail\/64931f10e9ff715c98108f0a.jpg 460w,\n              https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.06\/article\/64931f10e9ff715c98108f0a.jpg 980w,\n            \" \/><img loading=\"lazy\" decoding=\"async\" class=\"Picture-root Picture-default lazyautosizes lazyloaded\" src=\"https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.06\/thumbnail\/64931f10e9ff715c98108f0a.jpg\" sizes=\"auto, 280px\" alt=\"Proponen una nueva teor\u00eda del espacio, en la que no existe la expansi\u00f3n del universo\" width=\"497\" height=\"278\" data-sizes=\"auto\" data-src=\"https:\/\/mf.b37mrtl.ru\/actualidad\/public_images\/2023.06\/thumbnail\/64931f10e9ff715c98108f0a.jpg\" \/><\/picture><\/div>\n<\/div>\n<div class=\"Card-contentWrap\">\n<div class=\"Card-content\">\n<div class=\"Card-title\">\n<div class=\"HeaderNews-root HeaderNews-type_6 \"><a class=\"Link-root Link-isFullCard \" href=\"https:\/\/actualidad.rt.com\/actualidad\/470828-cientifico-ofrece-nueva-teoria-espacio\">Proponen una nueva teor\u00eda del espacio, en la que no existe la expansi\u00f3n del universo<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<h3><strong>Desarrollo de las predicciones sobre las estrellas oscuras<\/strong><\/h3>\n<p>\u00abPredijimos en 2012 que las estrellas oscuras supermasivas podr\u00edan observarse con JWST\u00bb, record\u00f3 otro de los autores del trabajo, Cosmin Ilie, de la Universidad Colgate (EE.UU.). \u00abComo se muestra en nuestro art\u00edculo de PNAS,\u00a0<a href=\"https:\/\/www.pnas.org\/doi\/10.1073\/pnas.2305762120\" target=\"_blank\" rel=\"noopener noreferrer\">publicado<\/a>\u00a0recientemente, ya encontramos tres candidatas a estrellas oscuras supermasivas al analizar los datos de JWST para los cuatro objetos [\u2026] de alto corrimiento al rojo [\u2026] y conf\u00edo en que pronto identificaremos muchas m\u00e1s\u00bb, agreg\u00f3.<\/p>\n<p>Los cient\u00edficos consideran que la materia oscura (que constituye el 25 % del universo) consiste en un nuevo tipo de part\u00edcula elemental que a\u00fan no han podido detectar. Hipot\u00e9ticamente,\u00a0<strong>cuando estas part\u00edculas chocan, se aniquilan a s\u00ed mismas desprendiendo m\u00e1s y m\u00e1s calor en nubes de hidr\u00f3geno<\/strong>. Esto evitar\u00eda que el gas colapsara hasta un n\u00facleo lo suficientemente denso como para soportar la fusi\u00f3n, como ocurre en una estrella ordinaria. En cambio, la estrella oscura continuar\u00e1 acumulando m\u00e1s gas y materia oscura, volvi\u00e9ndose grande, hinchada y mucho m\u00e1s brillante que las estrellas ordinarias.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>El telescopio espacial ha detectado varios objetos c\u00f3smicos que podr\u00edan ser las primeras \u00abestrellas oscuras\u00bb jam\u00e1s observadas. Un grupo de astrof\u00edsicos\u00a0encontr\u00f3\u00a0tres objetos estelares brillantes con el telescopio espacial James Webb (JWST, por sus siglas en ingl\u00e9s) que posiblemente sean \u00abestrellas&hellip;<\/p>\n","protected":false},"author":1181,"featured_media":1752081,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[497,39,106739],"tags":[48234,598,51688,51904,54016,61874,58443,1404],"class_list":["post-1752078","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciencia-tecnologia","category-internacional","category-noticia","tag-astronomia","tag-ciencia","tag-descubrimientos","tag-espacio","tag-estados-unidos-es","tag-estrellas","tag-nasa-es","tag-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nuevo hallazgo del James Webb podr\u00eda revelar la naturaleza de la materia oscura<\/title>\n<meta name=\"description\" content=\"El telescopio espacial ha detectado varios objetos c\u00f3smicos que podr\u00edan ser las primeras &quot;estrellas oscuras&quot; jam\u00e1s observadas. 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