{"podcast":{"title":"Ça Se Passe Là-Haut","slug":"a-se-passe-l-haut-745418","podcast_index_feed_id":745418,"rss_url":"https://casepasselahaut.lepodcast.fr/rss","website_url":"https://www.ca-se-passe-la-haut.fr","image_url":"https://uploads.podcloud.fr/uploads/covers/3b/aa/3baa6f78bfcc5440934ebcff17967716e8bd404a.jpg","author":"Eric Simon","episode_count":1773,"summary":"Astronomie, astrophysique, cosmologie, astroparticules...","last_synced_at":null,"page_url":"https://stenobird.com/podcast/a-se-passe-l-haut-745418"},"episode":{"title":"#1749 : La transition de la supergéante rouge WOH G64 en une hypergéante jaune","slug":"1749-la-transition-de-la-superg-ante-rouge-woh-g64-en-une-hyperg-ante-jaune","published_at":"2026-02-28T18:06:00+00:00","page_url":"https://stenobird.com/podcast/a-se-passe-l-haut-745418/1749-la-transition-de-la-superg-ante-rouge-woh-g64-en-une-hyperg-ante-jaune","show_page_url":"https://stenobird.com/podcast/a-se-passe-l-haut-745418","url":"https://www.ca-se-passe-la-haut.fr/2026/02/la-transition-de-la-supergeante-rouge.html","audio_url":"https://stats.podcloud.fr/casepasselahaut/numero-1749-la-transition-de-la-supergeante-rouge-woh-g64-en-une-hypergeante-jaune/enclosure.f999403e81f2a96fb2c32cc6aaff4158f9b265a0acea7021890864750c664429.mp3?p=f","summary":"Une nouvelle étude parue dans Nature Astronomy montre que l'une des plus grandes étoiles connues, nommée WOH G64, a subi une transformation spectaculaire en 2014 en passant de supergéante rouge à hypergéante jaune. Ce changement brutal pourrait être le signe d'une supernova imminente. Source The dramatic transition of the extreme red supergiant WOH G64 to a yellow hypergiant Gonzalo Muñoz-Sanchez et al. Nature Astronomy (23 february 2026) https://doi.org/10.1038/s41550-026-02789-7 Illustrations Image de WOH G64 par le VLTI et représentation d'artiste (ESO/K. Ohnaka et al., L. Calçada) Evolution du spectre de WOH G64 lors de la transition (Muñoz-Sanchez et al.) Gonzalo Muñoz-Sanchez","meta_description":"Une nouvelle étude parue dans Nature Astronomy montre que l'une des plus grandes étoiles connues, nommée WOH G64, a subi une transformation spectaculaire…","key_points":[],"chapters":[],"topics":[],"duration_seconds":858,"processing_state":"not_requested","actions":[{"name":"request_transcript","method":"POST","url":"https://stenobird.com/v1/public/podcasts/a-se-passe-l-haut-745418/episodes/1749-la-transition-de-la-superg-ante-rouge-woh-g64-en-une-hyperg-ante-jaune/transcription-requests","description":"Idempotently request low-priority transcript generation for this episode."},{"name":"read_markdown","method":"GET","url":"https://stenobird.com/podcast/a-se-passe-l-haut-745418/1749-la-transition-de-la-superg-ante-rouge-woh-g64-en-une-hyperg-ante-jaune.md","description":"Read the agent-friendly Markdown representation of this episode resource."}]}}