{"id":2673,"date":"2026-09-15T16:10:04","date_gmt":"2026-09-15T14:10:04","guid":{"rendered":"https:\/\/vega78astronomie.fr\/?p=2673"},"modified":"2026-09-15T16:10:04","modified_gmt":"2026-09-15T14:10:04","slug":"la-supernova-sn-2026aaiv-dans-ngc7331","status":"publish","type":"post","link":"https:\/\/vega78astronomie.fr\/index.php\/2026\/09\/15\/la-supernova-sn-2026aaiv-dans-ngc7331\/","title":{"rendered":"La supernova SN 2026aaiv dans NGC7331"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Le syst\u00e8me de surveillance du ciel ATLAS a d\u00e9couvert cette supernova le 1er septembre tout pr\u00e8s du noyau de la galaxie NGC7331 situ\u00e9e \u00e0 40 millions d&rsquo;ann\u00e9es-lumi\u00e8re dans la constellation de P\u00e9gase. Elle a gagn\u00e9 en luminosit\u00e9 depuis, et affiche maintenant une magnitude de 12. <br>C&rsquo;est une <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Supernova_thermonucl%C3%A9aire\" data-type=\"link\" data-id=\"https:\/\/fr.wikipedia.org\/wiki\/Supernova_thermonucl%C3%A9aire\">supernova de type Ia<\/a>, due \u00e0 l&rsquo;explosion thermonucl\u00e9aire d&rsquo;une naine blanche ayant accr\u00e9t\u00e9 de la mati\u00e8re depuis une \u00e9toile compagnon, jusqu&rsquo;\u00e0 atteindre un seuil de masse critique de l&rsquo;ordre de 1,4 masses solaires.<br><br>Cette m\u00eame galaxie a \u00e9t\u00e9 le si\u00e8ge l&rsquo;an dernier d&rsquo;une autre supernova, SN2025rbs, elle aussi de type Ia.<br><br>Informations scientifiques sur cette supernova SN2026aaiv disponibles <a href=\"https:\/\/www.wis-tns.org\/object\/2026aaiv\" data-type=\"link\" data-id=\"https:\/\/www.wis-tns.org\/object\/2026aaiv\">ici<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1003\" src=\"https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-1024x1003.jpg\" alt=\"\" class=\"wp-image-2674\" srcset=\"https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-1024x1003.jpg 1024w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-300x294.jpg 300w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-768x752.jpg 768w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-100x98.jpg 100w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-1536x1505.jpg 1536w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-2048x2006.jpg 2048w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-200x196.jpg 200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>Photo Pascal Berteau, 30 minutes avec un RC8 de 1600 mm de focale.<\/em><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1004\" src=\"https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-gros-plan-1024x1004.jpg\" alt=\"\" class=\"wp-image-2675\" srcset=\"https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-gros-plan-1024x1004.jpg 1024w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-gros-plan-300x294.jpg 300w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-gros-plan-768x753.jpg 768w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-gros-plan-100x98.jpg 100w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-gros-plan-200x196.jpg 200w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/09\/NGC7331-et-SN2026aaiv-PB-gros-plan.jpg 1399w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>Idem en gros plan<\/em><\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Le syst\u00e8me de surveillance du ciel ATLAS a d\u00e9couvert cette supernova le 1er septembre tout pr\u00e8s du noyau de la galaxie NGC7331 situ\u00e9e \u00e0 40 millions d&rsquo;ann\u00e9es-lumi\u00e8re dans la constellation de P\u00e9gase. Elle a gagn\u00e9 en luminosit\u00e9 depuis, et affiche maintenant une magnitude de 12. C&rsquo;est une supernova de type Ia, due \u00e0 l&rsquo;explosion thermonucl\u00e9aire [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[139,140],"class_list":["post-2673","post","type-post","status-publish","format-standard","hentry","category-ciel-profond","tag-ngc7331","tag-supernova"],"_links":{"self":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/2673","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/comments?post=2673"}],"version-history":[{"count":1,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/2673\/revisions"}],"predecessor-version":[{"id":2676,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/2673\/revisions\/2676"}],"wp:attachment":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/media?parent=2673"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/categories?post=2673"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/tags?post=2673"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}