{"id":5749,"date":"2024-09-20T13:00:00","date_gmt":"2024-09-20T13:00:00","guid":{"rendered":"https:\/\/slottsskogsobservatoriet.se\/?p=5749"},"modified":"2024-09-21T11:08:10","modified_gmt":"2024-09-21T11:08:10","slug":"t-coronae-borealis-den-kommande-novaexplosionen-som-kan-ljusa-upp-himlen-2024","status":"publish","type":"post","link":"https:\/\/slottsskogsobservatoriet.se\/en\/t-coronae-borealis-den-kommande-novaexplosionen-som-kan-ljusa-upp-himlen-2024\/","title":{"rendered":"T Coronae Borealis: Den kommande novaexplosionen som kommer att synas med blotta \u00f6gat!"},"content":{"rendered":"<h3 class=\"wp-block-heading\"><strong>Astronomer \u00f6ver hela v\u00e4rlden v\u00e4ntar med sp\u00e4nning p\u00e5 en av \u00e5rets mest spektakul\u00e4ra himlafenomen: novaexplosionen fr\u00e5n T Coronae Borealis (T CrB). Denna \u00e5terkommande nova, som exploderar ungef\u00e4r var 80:e \u00e5r, v\u00e4ntas snart lysa upp natthimlen. Den senaste explosionen intr\u00e4ffade 1946, och forskare tror att vi \u00e4r p\u00e5 v\u00e4g att f\u00e5 se n\u00e4sta utbrott inom kort, m\u00f6jligen innan slutet av 2024.<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Vad \u00e4r T Coronae Borealis?<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">T Coronae Borealis \u00e4r ett bin\u00e4rt stj\u00e4rnsystem som best\u00e5r av en vit dv\u00e4rg och en r\u00f6d j\u00e4ttestj\u00e4rna. Stj\u00e4rnorna kretsar runt varandra, och den vita dv\u00e4rgen drar till sig material fr\u00e5n den r\u00f6da j\u00e4tten. N\u00e4r tillr\u00e4ckligt mycket v\u00e4te har samlats p\u00e5 den vita dv\u00e4rgens yta, sker en termonukle\u00e4r explosion som g\u00f6r att systemet snabbt \u00f6kar i ljusstyrka.<br>T CrB \u00e4r en av endast tio k\u00e4nda \u00e5terkommande novor i Vintergatan, vilket g\u00f6r den s\u00e4rskilt fascinerande f\u00f6r forskare. Varje novaexplosion inneb\u00e4r en dramatisk \u00f6kning i ljusstyrka, fr\u00e5n osynlig f\u00f6r blotta \u00f6gat till att bli lika ljus som Polstj\u00e4rnan under n\u00e5gra dagar.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">N\u00e4r kan utbrottet ske?<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Det exakta datumet f\u00f6r n\u00e4r explosionen kommer att intr\u00e4ffa \u00e4r sv\u00e5rt att f\u00f6ruts\u00e4ga, men forskare f\u00f6ljer noga T CrB:s beteende. Den vita dv\u00e4rgen har visat liknande ljusfluktuationer som f\u00f6re utbrotten 1866 och 1946, vilket tyder p\u00e5 att n\u00e4sta explosion kan ske snart. NASA:s observationer har ocks\u00e5 visat att stj\u00e4rnan b\u00f6rjade dippa i ljusstyrka 2021, precis som f\u00f6re de tidigare utbrotten.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">William Cooke, forskare vid NASA:s Meteoroid Environments Office, har noterat att stj\u00e4rnan har f\u00f6ljt samma m\u00f6nster som den gjorde f\u00f6re utbrottet 1946. Det g\u00f6r att forskarna tror att explosionen kan ske n\u00e4r som helst under september m\u00e5nad!<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Varf\u00f6r \u00e4r novaexplosionen viktig?<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">F\u00f6rutom att vara en spektakul\u00e4r syn f\u00f6r stj\u00e4rnsk\u00e5dare erbjuder novaexplosioner som denna en unik m\u00f6jlighet f\u00f6r forskare att studera stj\u00e4rnors utveckling och interaktioner. Eftersom T CrB ligger relativt n\u00e4ra v\u00e5rt solsystem, kan forskare samla in data om hur dessa explosioner sker och vilka mekanismer som driver dem.<br>NASA har f\u00f6rberett sig f\u00f6r att anv\u00e4nda en rad teleskop f\u00f6r att studera explosionen n\u00e4r den intr\u00e4ffar. Data fr\u00e5n tidigare utbrott och dagens avancerade teknik kommer att hj\u00e4lpa forskare att b\u00e4ttre f\u00f6rst\u00e5 den vita dv\u00e4rgens utveckling och processer.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Hur kan du se novaexplosionen?<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">T CrB ligger i stj\u00e4rnbilden Corona Borealis, som kan hittas mellan stj\u00e4rnbilderna Herkules och Bj\u00f6rnvaktaren <em>(Bo\u00f6tes i bilden nedan)<\/em>. Vid explosionen kommer stj\u00e4rnan att n\u00e5 en ljusstyrka j\u00e4mf\u00f6rbar med Polstj\u00e4rnan (magnitud 2). Novaexplosionen f\u00f6rv\u00e4ntas vara synlig f\u00f6r blotta \u00f6gat under flera dagar och f\u00f6rsvagas sedan gradvis. F\u00f6r att kunna observera h\u00e4ndelsen \u00e4r det b\u00e4st att bli bekant med Corona Borealis redan nu s\u00e5 att det blir enkelt att hitta T CrB.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/slottsskogsobservatoriet.se\/wp-content\/uploads\/2024\/09\/findhercules-nsn896.jpg.webp\"><img decoding=\"async\" width=\"896\" height=\"504\" src=\"https:\/\/slottsskogsobservatoriet.se\/wp-content\/uploads\/2024\/09\/findhercules-nsn896.jpg.webp\" alt=\"\" class=\"wp-image-5751\" style=\"width:551px;height:auto\" srcset=\"https:\/\/slottsskogsobservatoriet.se\/wp-content\/uploads\/2024\/09\/findhercules-nsn896.jpg.webp 896w, https:\/\/slottsskogsobservatoriet.se\/wp-content\/uploads\/2024\/09\/findhercules-nsn896.jpg-300x169.webp 300w, https:\/\/slottsskogsobservatoriet.se\/wp-content\/uploads\/2024\/09\/findhercules-nsn896.jpg-18x10.webp 18w\" sizes=\"(max-width: 896px) 100vw, 896px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Stj\u00e4rnkarta som visar vart man kan hitta T Corona Borealis. <em>(Bildk\u00e4lla: NASA)<\/em><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Slutord<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Novaexplosionen fr\u00e5n T Coronae Borealis \u00e4r ett av \u00e5rets mest efterl\u00e4ngtade himlafenomen. Det ger b\u00e5de amat\u00f6rer och professionella astronomer chansen att se en spektakul\u00e4r och s\u00e4llsynt h\u00e4ndelse p\u00e5 himlen. H\u00e5ll utkik mot natthimlen f\u00f6r att f\u00e5nga detta unika \u00f6gonblick! Vi kommer att meddela er s\u00e5 fort det g\u00e5r att se den s\u00e5 ha koll p\u00e5 v\u00e5ra sociala medier (Slottsskogsobservatoriet p\u00e5 Facebook och Instagram). Vi rekommenderar er \u00e4ven att ladda ner en planetarium app, s\u00e5som Stellarium, f\u00f6r att f\u00e5 hj\u00e4lp med att hitta den n\u00e4r ni s\u00f6ker efter den. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u00e4llor:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>NASA: <a href=\"https:\/\/www.nasa.gov\/centers-and-facilities\/marshall\/nasa-global-astronomers-await-rare-nova-explosion\/\">Global Astronomers Await Rare Nova Explosion<\/a><\/li>\n\n\n\n<li>Smithsonian: <a href=\"https:\/\/www.smithsonianmag.com\/science-nature\/rare-nova-explosion-new-star-night-sky-180978784\/\">A Rare Nova Explosion Will Soon Bring a &#8217;New Star&#8217; to the Night Sky<\/a><\/li>\n\n\n\n<li>Astronomy: <a href=\"https:\/\/www.astronomy.com\/news\">A new star in the sky might be the &#8217;brightest nova of the generation<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Astronomer \u00f6ver hela v\u00e4rlden v\u00e4ntar med sp\u00e4nning p\u00e5 en av \u00e5rets mest spektakul\u00e4ra himlafenomen: novaexplosionen fr\u00e5n T Coronae Borealis (T CrB). Denna \u00e5terkommande nova, som exploderar ungef\u00e4r var 80:e \u00e5r, v\u00e4ntas snart lysa upp natthimlen. Den senaste explosionen intr\u00e4ffade 1946, och forskare tror att vi \u00e4r p\u00e5 v\u00e4g att f\u00e5 se n\u00e4sta utbrott inom kort, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5750,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[37],"tags":[35,43,92,15,99],"class_list":["post-5749","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomiska-handelser","tag-nyheter","tag-rymdhandelser","tag-rymdnyheter","tag-slottsskogsobservatoriet","tag-t-coronae-borealis"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"T Coronae Borealis f\u00f6rv\u00e4ntas snart explodera som en nova, en spektakul\u00e4r h\u00e4ndelse synlig f\u00f6r blotta \u00f6gat. 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