{"id":50283,"date":"2025-07-02T18:15:59","date_gmt":"2025-07-02T16:15:59","guid":{"rendered":"https:\/\/www.h-its.org\/de\/?p=50283"},"modified":"2025-11-26T18:26:01","modified_gmt":"2025-11-26T17:26:01","slug":"doppelte-detonation","status":"publish","type":"post","link":"https:\/\/www.h-its.org\/de\/2025\/07\/02\/doppelte-detonation\/","title":{"rendered":"Doppelte Detonation: Tod eines wei\u00dfen Zwergs"},"content":{"rendered":"\n

Ein internationales Team unter Mitwirkung von HITS-Forschenden hat visuell bewiesen, dass ein Wei\u00dfer Zwergstern in einer doppelten Detonation explodierte und nicht, wie bisher angenommen, durch eine einzige. Mit dem Very Large Telescope (VLT) der ESO und dessen MUSE-Instrument nahmen sie ein Bild des Supernova-\u00dcberrestes SNR 0509 67.5 auf, der sich etwa 160.000 Lichtjahre entfernt in der Gro\u00dfen Magellanschen Wolke befindet.<\/p>\n\n\n

\n
\"This<\/a>
VLT-Aufnahme einer Supernova mit doppelter Detonation (Bild: ESO)<\/figcaption><\/figure>\n<\/div>\n\n\n

Zum ersten Mal haben sie zwei konzentrische Kalziumschalen \u2013 einen \u00e4u\u00dferen und einen inneren Ring \u2013 beobachtet, die sie als \u00dcberreste der beiden Explosionen interpretieren: Zuerst entz\u00fcndete sich die Heliumh\u00fclle des Wei\u00dfen Zwergs, und kurz darauf detonierte der Kern.<\/p>\n\n\n\n

\u201eDie Explosionen von Wei\u00dfen Zwergen spielen in der Astronomie eine entscheidende Rolle\u201c, sagt Priyam Das<\/a>,(University of New South Wales Canberra, Australien), Erstautor der Studie<\/a> und ehemaliger HITS-Gastwissenschaftler. Ein Gro\u00dfteil unseres Wissens \u00fcber die Expansion des Universums basiert auf Supernovae vom Typ Ia, die auch die Hauptquelle f\u00fcr Eisen auf unserem Planeten sind, einschlie\u00dflich des Eisens in unserem Blut. Die Ergebnisse der Studie geben Aufschluss dar\u00fcber, wie einige dieser Supernovae auf andere Weise entstehen k\u00f6nnen.<\/p>\n\n\n\n

Ivo Seitenzahl, der als Gastwissenschaftler in der HITS-Gruppe \u201ePhysics of Stellar Objects<\/a>\u201c die Beobachtungen leitete, sieht in den Ergebnissen einen klaren Hinweis darauf, \u201edass Wei\u00dfe Zwerge schon lange vor Erreichen der ber\u00fchmten Chandrasekhar-Masse explodieren k\u00f6nnen und dass der Mechanismus der Doppeldetonation tats\u00e4chlich in der Natur vorkommt\u201c.<\/p>\n\n\n\n

Das, P., Seitenzahl, I.R., Ruiter, A.J.\u00a0et al.\u00a0Calcium in a supernova remnant as a fingerprint of a sub-Chandrasekhar-mass explosion.\u00a0In: Nat Astron\u00a0(2025). <\/em>https:\/\/doi.org\/10.1038\/s41550-025-02589-5<\/em><\/a><\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Ein internationales Team unter Mitwirkung von HITS-Forschenden hat visuell bewiesen, dass ein Wei\u00dfer Zwergstern in einer doppelten Detonation explodierte und …<\/p>\n","protected":false},"author":58,"featured_media":50284,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1,92],"hits-research-group":[1279],"class_list":["post-50283","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gruppen-news","category-wissenschaftsnews","hits-research-group-pso-de"],"acf":[],"yoast_head":"\nDoppelte Detonation: Tod eines wei\u00dfen Zwergs - HITS gGmbH<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.h-its.org\/de\/2025\/07\/02\/doppelte-detonation\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Doppelte Detonation: Tod eines wei\u00dfen Zwergs - 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