{"id":16118,"date":"2022-03-01T16:07:41","date_gmt":"2022-03-01T16:07:41","guid":{"rendered":"https:\/\/www.africa-press.net\/cameroun\/politique\/un-trou-noir-incline-destabilise-les-scientifiques"},"modified":"2022-03-01T18:18:28","modified_gmt":"2022-03-01T18:18:28","slug":"un-trou-noir-incline-destabilise-les-scientifiques","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/cameroun\/toutes-les-actualites\/un-trou-noir-incline-destabilise-les-scientifiques","title":{"rendered":"Un trou noir inclin\u00e9 d\u00e9stabilise les scientifiques"},"content":{"rendered":"

Africa-Press – Cameroun. <\/strong><\/span>L\u2019objet astronomique tourne avec un angle de 40 degr\u00e9s autour de son axe, ce qui semblait impossible, \u00e0 mois d\u2019avoir re\u00e7u un \u00abcoup de pied\u00bb lors de sa formation.<\/b><\/p>\n

L\u2019univers regorge de surprises et de ph\u00e9nom\u00e8nes \u00e9tonnants. Les trous noirs sont parmi les plus intrigants et il a fallu attendre 2019 pour pouvoir photographier l\u2019un d\u2019eux. La particularit\u00e9 d\u2019un autre, qui vient d\u2019\u00eatre d\u00e9couverte, ne fait qu\u2019ajouter \u00e0 leur \u00e9tranget\u00e9. MAXI J1820+070 (c\u2019est son nom) a un axe de rotation inclin\u00e9 d\u2019au moins 40 degr\u00e9s sur son plan orbital. Ce que les astrophysiciens pensaient totalement impossible.<\/p>\n

L\u2019objet cosmique, distant d\u2019environ 10 000 ann\u00e9es-lumi\u00e8re, est associ\u00e9 \u00e0 une \u00e9toile. Form\u00e9 lors de l\u2019effondrement de l\u2019int\u00e9rieur d\u2019une supernova, il a une gravit\u00e9 si forte qu\u2019il attire tout, m\u00eame la lumi\u00e8re. D\u00e9couvert en 2018, il arrache de la mati\u00e8re \u00e0 son \u00e9toile proche, qui s\u2019accumule dans un disque tournant autour du centre du trou noir. Une partie est aspir\u00e9e \u00e0 l\u2019int\u00e9rieur, mais une autre est d\u00e9vi\u00e9e par les champs magn\u00e9tiques et \u00e9ject\u00e9e dans l\u2019espace en deux jets oppos\u00e9s, habituellement perpendiculaires au plan orbital.<\/p>\n

Une explosion originelle asym\u00e9trique<\/b><\/p>\n

Mais de r\u00e9centes observations effectu\u00e9es gr\u00e2ce \u00e0 un t\u00e9lescope aux Canaries ont r\u00e9v\u00e9l\u00e9 l\u2019anomalie: ce trou noir a le plus grand d\u00e9salignement jamais signal\u00e9, selon Juri Poutanen, astronome \u00e0 l\u2019Universit\u00e9 de Turku en Finlande, explique Space.com. Les astrophysiciens pensaient que certains axes de rotation des trous noirs puissent \u00eatre l\u00e9g\u00e8rement mal align\u00e9s, mais pas \u00e0 ce point. Pour expliquer ce ph\u00e9nom\u00e8ne, les scientifiques penchent (c\u2019est le cas de le dire) vers l\u2019id\u00e9e que le trou noir a pu recevoir comme un \u00abcoup de pied\u00bb au moment de l\u2019explosion qui l\u2019a cr\u00e9\u00e9. L\u2019explosion d\u2019une supernova n\u2019\u00e9tant pas sym\u00e9trique, elle peut en effet d\u00e9s\u00e9quilibrer l\u2019axe de rotation. Mais avec un tel angle, cela d\u00e9concerte les chercheurs, d\u2019autant plus que l\u2019accumulation de mati\u00e8re par la suite entre le trou noir et l\u2019\u00e9toile devrait avoir tendance \u00e0 rapprocher les axes de l\u2019alignement du plan orbital. Ce qui semble \u00e9galement exclure que le d\u00e9s\u00e9quilibre de ce trou noir se soit produit apr\u00e8s sa formation.<\/p>\n

Cette d\u00e9couverte pourrait avoir des implications sur la science des trous noirs, car s\u2019ils ont des angles d\u2019inclinaison plus grands qu\u2019imagin\u00e9s, cela modifierait les estimations de leur masse, qui pourrait \u00eatre plus grande que pr\u00e9vu. Les astrophysiciens vont maintenant chercher \u00e0 savoir si ces trous noirs inclin\u00e9s sont courants ou si celui-ci est une exception.<\/p>\n

Pour plus d’informations et d’analyses sur la Cameroun<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Cameroun. L\u2019objet astronomique tourne avec un angle de 40 degr\u00e9s autour de son axe, ce qui semblait impossible, \u00e0 mois d\u2019avoir re\u00e7u un \u00abcoup de pied\u00bb lors de sa formation. L\u2019univers regorge de surprises et de ph\u00e9nom\u00e8nes \u00e9tonnants. Les trous noirs sont parmi les plus intrigants et il a fallu attendre 2019 pour […]<\/p>\n","protected":false},"author":82,"featured_media":16117,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,11,10],"tags":[36,50,49],"class_list":["post-16118","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-homepage-french","category-toutes-les-actualites","tag-africa-press","tag-africa-press-cameroun","tag-cameroun"],"yoast_head":"\nUn trou noir inclin\u00e9 d\u00e9stabilise les scientifiques - Cameroun<\/title>\n<meta name=\"description\" content=\"L\u2019objet astronomique tourne avec un angle de 40 degr\u00e9s autour de son axe, ce qui semblait impossible, \u00e0 mois d\u2019avoir ...\" \/>\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.africa-press.net\/cameroun\/toutes-les-actualites\/un-trou-noir-incline-destabilise-les-scientifiques\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Un trou noir inclin\u00e9 d\u00e9stabilise les scientifiques\" \/>\n<meta property=\"og:description\" content=\"L\u2019objet astronomique tourne avec un angle de 40 degr\u00e9s autour de son axe, ce qui semblait impossible, \u00e0 mois d\u2019avoir ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/cameroun\/toutes-les-actualites\/un-trou-noir-incline-destabilise-les-scientifiques\" \/>\n<meta property=\"og:site_name\" content=\"Cameroun\" \/>\n<meta property=\"article:published_time\" content=\"2022-03-01T16:07:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-03-01T18:18:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/cameroun\/sites\/57\/2022\/03\/img-621e63382c027.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"673\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/cameroun\/toutes-les-actualites\/un-trou-noir-incline-destabilise-les-scientifiques#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/cameroun\/toutes-les-actualites\/un-trou-noir-incline-destabilise-les-scientifiques\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/cameroun\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Un trou noir inclin\u00e9 d\u00e9stabilise les scientifiques\",\"datePublished\":\"2022-03-01T16:07:41+00:00\",\"dateModified\":\"2022-03-01T18:18:28+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/cameroun\/toutes-les-actualites\/un-trou-noir-incline-destabilise-les-scientifiques\"},\"wordCount\":488,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/cameroun\/toutes-les-actualites\/un-trou-noir-incline-destabilise-les-scientifiques#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/cameroun\/sites\/57\/2022\/03\/img-621e63382c027.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Cameroun\",\"Cameroun\"],\"articleSection\":[\"Divers\",\"homepage-french\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/cameroun\/toutes-les-actualites\/un-trou-noir-incline-destabilise-les-scientifiques#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/cameroun\/toutes-les-actualites\/un-trou-noir-incline-destabilise-les-scientifiques\",\"url\":\"https:\/\/www.africa-press.net\/cameroun\/toutes-les-actualites\/un-trou-noir-incline-destabilise-les-scientifiques\",\"name\":\"Un trou noir inclin\u00e9 d\u00e9stabilise les scientifiques - 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