{"id":6610,"date":"2026-11-02T12:23:49","date_gmt":"2026-11-02T17:23:49","guid":{"rendered":"https:\/\/canasanta.ca\/?p=6610"},"modified":"2026-11-02T15:57:48","modified_gmt":"2026-11-02T20:57:48","slug":"37-galaxias-enanas-misterio-oxigeno-perdido","status":"publish","type":"post","link":"https:\/\/canasanta.ca\/en\/ciencia\/cosmos\/37-galaxias-enanas-misterio-oxigeno-perdido\/","title":{"rendered":"37 GALAXIAS ENANAS ESCONDEN EL MISTERIO DEL OX\u00cdGENO PERDIDO"},"content":{"rendered":"

Un estudio de 37 galaxias enanas cercanas<\/strong> ha encontrado algo que no encaja con lo esperado: gran parte del ox\u00edgeno producido por sus estrellas parece haber desaparecido<\/strong>. El resultado obliga a mirar de nuevo c\u00f3mo las galaxias peque\u00f1as fabrican, retienen y expulsan los elementos pesados que terminan formando nuevas estrellas, planetas y, en \u00faltima instancia, la materia de mundos como el nuestro.<\/p>\n

La investigaci\u00f3n, publicada este lunes en The Astrophysical Journal<\/em><\/strong>, utiliz\u00f3 observaciones del telescopio espacial Hubble<\/strong> dentro del programa GLOW<\/strong>, siglas de Galaxies Losing Oxygen via Winds<\/em>. Los investigadores compararon la cantidad de ox\u00edgeno que las estrellas deber\u00edan haber producido con la que todav\u00eda puede detectarse dentro de esas galaxias.<\/p>\n

 <\/p>\n

EL OX\u00cdGENO QUE NO APARECE<\/h2>\n

Las estrellas generan elementos m\u00e1s pesados mediante procesos nucleares y los devuelven al espacio durante distintas etapas de su evoluci\u00f3n. El ox\u00edgeno es especialmente \u00fatil para los astr\u00f3nomos porque funciona como marcador de una familia m\u00e1s amplia de elementos pesados.<\/p>\n

Sin embargo, las simulaciones indican que estas galaxias deber\u00edan conservar bastante m\u00e1s ox\u00edgeno del que las observaciones revelan. La diferencia es demasiado grande para ignorarla: las galaxias enanas parecen retener solo una fracci\u00f3n de los elementos que producen sus propias estrellas.<\/p>\n

 <\/p>\n

VIENTOS CAPACES DE VACIAR UNA GALAXIA<\/h2>\n

La explicaci\u00f3n principal apunta a los poderosos vientos gal\u00e1cticos<\/strong>. Las galaxias enanas poseen una gravedad mucho m\u00e1s d\u00e9bil que sistemas gigantes como la V\u00eda L\u00e1ctea<\/strong>. Cuando numerosas estrellas masivas explotan o expulsan material, parte del gas enriquecido puede alcanzar suficiente velocidad para escapar.<\/p>\n

Ese proceso convertir\u00eda a estas peque\u00f1as galaxias en una especie de f\u00e1brica que produce elementos qu\u00edmicos pero no consigue conservarlos. El material expulsado pasar\u00eda al espacio intergal\u00e1ctico, enriqueciendo el entorno que rodea a las galaxias.<\/p>\n

 <\/p>\n

UNA PISTA SOBRE EL UNIVERSO PRIMITIVO<\/h2>\n

El hallazgo tiene consecuencias que van m\u00e1s all\u00e1 de estas 37 galaxias. Las galaxias enanas son consideradas laboratorios naturales para comprender etapas tempranas de la evoluci\u00f3n c\u00f3smica, cuando muchas estructuras del universo eran m\u00e1s peque\u00f1as y qu\u00edmicamente menos maduras.<\/p>\n

Entender cu\u00e1nto material pierden permite reconstruir mejor c\u00f3mo se distribuyeron elementos como el ox\u00edgeno a lo largo de miles de millones de a\u00f1os. Tambi\u00e9n ayuda a explicar por qu\u00e9 galaxias de tama\u00f1os diferentes poseen composiciones qu\u00edmicas tan distintas.<\/p>\n

 <\/p>\n

EL CASO DE NGC 4449<\/h2>\n

Entre los objetos analizados se encuentra NGC 4449<\/strong>, una galaxia enana irregular conocida por su intensa formaci\u00f3n estelar. Su apariencia ca\u00f3tica y sus numerosas regiones de nacimiento de estrellas la convierten en un ejemplo espectacular de los sistemas estudiados.<\/p>\n

La pregunta que queda abierta es cu\u00e1nto ox\u00edgeno termin\u00f3 realmente fuera de estas galaxias y d\u00f3nde se encuentra ahora. Los investigadores deber\u00e1n seguir rastreando ese material en el gas que las rodea. El misterio no consiste en que el ox\u00edgeno haya dejado de existir, sino en descubrir hasta d\u00f3nde pueden lanzarlo galaxias cuya gravedad no logra retenerlo<\/strong>.<\/p>","protected":false},"excerpt":{"rendered":"

Un estudio de 37 galaxias enanas cercanas ha encontrado algo que no encaja con lo esperado: gran parte del ox\u00edgeno producido por sus estrellas parece haber desaparecido. El resultado obliga a mirar de nuevo c\u00f3mo las galaxias peque\u00f1as fabrican, retienen y expulsan los elementos pesados que terminan formando nuevas estrellas, planetas y, en \u00faltima instancia, […]<\/p>\n","protected":false},"author":284226809,"featured_media":6609,"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":[33205457,3213,33205423,33206009],"tags":[33208407,33205980,33208409,33208408],"class_list":["post-6610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-al-dia","category-ciencia","category-cosmos","category-investigacion","tag-galaxias-enanas","tag-hubble","tag-ngc-4449","tag-oxigeno-cosmico"],"acf":[],"yoast_head":"\n37 GALAXIAS ENANAS ESCONDEN EL MISTERIO DEL OX\u00cdGENO PERDIDO - Ca\u00f1asanta<\/title>\n<meta name=\"description\" content=\"Un estudio de 37 galaxias enanas revela que gran parte del ox\u00edgeno producido por sus estrellas no permanece dentro de ellas. 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