{"id":4640,"date":"2026-10-20T20:31:14","date_gmt":"2026-10-21T00:31:14","guid":{"rendered":"https:\/\/canasanta.ca\/?p=4640"},"modified":"2026-10-20T20:43:28","modified_gmt":"2026-10-21T00:43:28","slug":"primeros-cinco-minutos-universo-helio","status":"publish","type":"post","link":"https:\/\/canasanta.ca\/en\/ciencia\/cosmos\/primeros-cinco-minutos-universo-helio\/","title":{"rendered":"LOS PRIMEROS CINCO MINUTOS DEL UNIVERSO, BAJO LA LUPA"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p><strong>Una huella qu\u00edmica nacida cuando el Universo ten\u00eda apenas minutos acaba de ser medida con una precisi\u00f3n r\u00e9cord.<\/strong> Un equipo internacional de astr\u00f3nomos determin\u00f3 la abundancia de helio primordial con una incertidumbre de solo 0,5%, aproximadamente tres veces menor que en mediciones anteriores.<\/p>\n<p>El resultado permite reconstruir con mayor exactitud las condiciones f\u00edsicas de los primeros cinco minutos posteriores al Big Bang y someter a una prueba especialmente exigente al modelo cosmol\u00f3gico est\u00e1ndar y a la f\u00edsica de part\u00edculas.<\/p>\n<p>&nbsp;<\/p>\n<h3><strong>Quince galaxias como c\u00e1psulas del tiempo<\/strong><\/h3>\n<p>Los investigadores concentraron el an\u00e1lisis en 15 galaxias peque\u00f1as, remotas y excepcionalmente pobres en elementos pesados. Su escasa evoluci\u00f3n qu\u00edmica las convierte en una suerte de c\u00e1psulas del tiempo: el gas que contienen conserva una composici\u00f3n relativamente cercana a la del Universo temprano.<\/p>\n<p>El equipo acumul\u00f3 130 horas de observaci\u00f3n con el Large Binocular Telescope. Mediante espectr\u00f3grafos de alta precisi\u00f3n analiz\u00f3 simult\u00e1neamente m\u00e1s de diez l\u00edneas espectrales de helio y quince de hidr\u00f3geno, lo que permiti\u00f3 identificar y corregir efectos sistem\u00e1ticos que antes pod\u00edan quedar ocultos.<\/p>\n<p>&nbsp;<\/p>\n<h3><strong>Una cifra que pone a prueba el Big Bang<\/strong><\/h3>\n<p>Durante los primeros minutos del cosmos, las temperaturas y densidades permitieron la formaci\u00f3n de los primeros n\u00facleos ligeros. La cantidad de helio producida entonces depende de las condiciones f\u00edsicas de aquel Universo extremadamente joven.<\/p>\n<p>Por eso la abundancia primordial de helio no es \u00fanicamente una cifra astron\u00f3mica. Funciona como una prueba independiente de la nucleos\u00edntesis del Big Bang y permite imponer l\u00edmites sobre propiedades fundamentales, entre ellas el n\u00famero efectivo de familias de neutrinos presentes en el Universo temprano.<\/p>\n<p>La medici\u00f3n obtenida por el proyecto alcanza una precisi\u00f3n suficiente para convertir al helio en una herramienta mucho m\u00e1s incisiva para buscar posibles desviaciones de la f\u00edsica conocida.<\/p>\n<p>&nbsp;<\/p>\n<h3><strong>Un telescopio mirando 13.800 millones de a\u00f1os hacia atr\u00e1s<\/strong><\/h3>\n<p>La investigaci\u00f3n forma parte de una serie de cinco trabajos publicados en <em>The Astrophysical Journal<\/em>. El m\u00e9todo evita depender \u00fanicamente de grandes muestras de galaxias y extrapolaciones estad\u00edsticas: selecciona objetos qu\u00edmicamente muy poco evolucionados y obtiene de ellos observaciones espectrosc\u00f3picas extremadamente detalladas.<\/p>\n<p>El resultado refuerza el cuadro b\u00e1sico del Big Bang caliente y, al mismo tiempo, estrecha el espacio en el que podr\u00edan esconderse part\u00edculas o fen\u00f3menos todav\u00eda desconocidos.<\/p>\n<p>Los astr\u00f3nomos no han observado directamente aquellos primeros cinco minutos. Han hecho algo quiz\u00e1 m\u00e1s extraordinario: encontrar su firma qu\u00edmica, todav\u00eda escrita en el Universo casi 13.800 millones de a\u00f1os despu\u00e9s.<\/p>","protected":false},"excerpt":{"rendered":"<p>Astr\u00f3nomos midieron el helio primordial con una incertidumbre de apenas 0,5%, tres veces menor que antes, y someten a una prueba m\u00e1s precisa la f\u00edsica del Big Bang.<\/p>","protected":false},"author":284226809,"featured_media":4642,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[33205457,33205423],"tags":[33206677,33205989,33207300,33207301,33206716],"class_list":["post-4640","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-al-dia","category-cosmos","tag-big-bang","tag-cosmologia","tag-helio-primordial","tag-large-binocular-telescope","tag-neutrinos"],"acf":{"introduccion":"","fuentes_y_referencias":"University of Minnesota Twin Cities \u2014 Researchers Make Record-Precision Measurement of Helium From the Early Universe (9 Sep 2026). The Astrophysical Journal \u2014 Large Binocular Telescope Primordial Helium Project, serie especial de cinco art\u00edculos (2026). The Ohio State University \u2014 LBT measures primordial helium with unprecedented precision (9 Sep 2026).","autor":[748]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.1 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>LOS PRIMEROS CINCO MINUTOS DEL UNIVERSO, BAJO LA LUPA - Ca\u00f1asanta<\/title>\n<meta name=\"description\" content=\"Astr\u00f3nomos miden el helio formado en los primeros cinco minutos del Universo con una precisi\u00f3n r\u00e9cord del 0,5% y ponen a prueba la f\u00edsica del Big Bang.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/canasanta.ca\/en\/science\/cosmos\/primeros-cinco-minutos-universo-helio\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LOS PRIMEROS CINCO MINUTOS DEL UNIVERSO, BAJO LA LUPA\" \/>\n<meta property=\"og:description\" content=\"Astr\u00f3nomos miden el helio formado en los primeros cinco minutos del Universo con una precisi\u00f3n r\u00e9cord del 0,5% y ponen a prueba la f\u00edsica del Big Bang.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/canasanta.ca\/en\/science\/cosmos\/primeros-cinco-minutos-universo-helio\/\" \/>\n<meta property=\"og:site_name\" content=\"Ca\u00f1asanta\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-21T00:31:14+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-21T00:43:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/i0.wp.com\/canasanta.ca\/wp-content\/uploads\/2026\/10\/Los-primeros-cinco-minutos-del-Universo-\u2014-observatorio.jpg?resize=1200,630&quality=85&strip=all&ssl=1\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Ca\u00f1asanta\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Ca\u00f1asanta\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/canasanta.ca\\\/ciencia\\\/cosmos\\\/primeros-cinco-minutos-universo-helio\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/canasanta.ca\\\/ciencia\\\/cosmos\\\/primeros-cinco-minutos-universo-helio\\\/\"},\"author\":{\"name\":\"Ca\u00f1asanta\",\"@id\":\"https:\\\/\\\/canasanta.ca\\\/#\\\/schema\\\/person\\\/21421a3c6f1733be6c5c590190fd8e93\"},\"headline\":\"LOS PRIMEROS CINCO MINUTOS DEL UNIVERSO, BAJO LA LUPA\",\"datePublished\":\"2026-10-21T00:31:14+00:00\",\"dateModified\":\"2026-10-21T00:43:28+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/canasanta.ca\\\/ciencia\\\/cosmos\\\/primeros-cinco-minutos-universo-helio\\\/\"},\"wordCount\":459,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/canasanta.ca\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/canasanta.ca\\\/ciencia\\\/cosmos\\\/primeros-cinco-minutos-universo-helio\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/i0.wp.com\\\/canasanta.ca\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/Los-primeros-cinco-minutos-del-Universo-%E2%80%94-observatorio.jpg?fit=1080%2C720&quality=82&strip=all&ssl=1\",\"keywords\":[\"Big Bang\",\"cosmolog\u00eda\",\"helio primordial\",\"Large Binocular Telescope\",\"neutrinos\"],\"articleSection\":[\"AL D\u00cdA!\",\"Cosmos\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/canasanta.ca\\\/ciencia\\\/cosmos\\\/primeros-cinco-minutos-universo-helio\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/canasanta.ca\\\/ciencia\\\/cosmos\\\/primeros-cinco-minutos-universo-helio\\\/\",\"url\":\"https:\\\/\\\/canasanta.ca\\\/ciencia\\\/cosmos\\\/primeros-cinco-minutos-universo-helio\\\/\",\"name\":\"LOS PRIMEROS CINCO MINUTOS DEL UNIVERSO, BAJO LA LUPA - 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