{"id":74941,"date":"2026-04-15T09:05:15","date_gmt":"2026-04-15T09:05:15","guid":{"rendered":"https:\/\/www.europesays.com\/be-fr\/74941\/"},"modified":"2026-04-15T09:05:15","modified_gmt":"2026-04-15T09:05:15","slug":"ce-trou-noir-supermassif-est-situe-dans-une-partie-inhabituelle-de-sa-galaxie","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/be-fr\/74941\/","title":{"rendered":"Ce trou noir supermassif est situ\u00e9 dans une partie inhabituelle de sa galaxie"},"content":{"rendered":"<p class=\"bodytext\">Depuis plus de 30 ans, les astronomes observent et \u00e9tudient la galaxie elliptique <a href=\"https:\/\/en.wikipedia.org\/wiki\/NGC_4486B\" target=\"_blank\" rel=\"nofollow noopener\">NGC 4486B<\/a>. Mais de nouvelles observations ont r\u00e9v\u00e9l\u00e9 la pr\u00e9sence d&rsquo;un <a href=\"http:\/\/www.notebookcheck.net\/This-distant-galaxy-has-lost-95-of-its-brightness-in-less-than-20-years.1271513.0.html\" target=\"_self\" class=\"internal-link\" rel=\"nofollow noopener\">trou noir supermassif<\/a> d&rsquo;une masse d&rsquo;environ 360 millions de fois celle du Soleil, situ\u00e9 dans une r\u00e9gion inhabituelle. En effet, dans la plupart des galaxies, les trous noirs supermassifs sont situ\u00e9s au centre. Or, dans NGC 4486B, il se trouve \u00e0 environ 19,5 ann\u00e9es-lumi\u00e8re du centre.  &#13;<\/p>\n<p class=\"bodytext\">Pour expliquer cette situation, <a href=\"http:\/\/www.notebookcheck.net\/A-new-galaxy-has-been-discovered-near-the-Andromeda-Galaxy.1268783.0.html\" target=\"_self\" class=\"internal-link\" rel=\"nofollow noopener\">astronomes<\/a> ont \u00e9tudi\u00e9 cette galaxie situ\u00e9e dans l&rsquo;amas de la Vierge <a href=\"http:\/\/www.atlasoftheuniverse.com\/galgrps\/vir.html\" target=\"_blank\" rel=\"nofollow noopener\">http:\/\/www.atlasoftheuniverse.com\/galgrps\/vir.html<\/a>\u00e0 l&rsquo;aide du spectrographe dans le proche infrarouge (NIRSpec) du t\u00e9lescope spatial James Webb. Et selon les r\u00e9sultats obtenus, ce ph\u00e9nom\u00e8ne pourrait \u00eatre d\u00fb \u00e0 une fusion entre deux trous noirs.<\/p>\n<p class=\"bodytext\">Ainsi, selon les estimations, ces deux trous noirs ont r\u00e9cemment fusionn\u00e9. Cette collision a \u00e9t\u00e9 puissante et a g\u00e9n\u00e9r\u00e9 une immense quantit\u00e9 d&rsquo;\u00e9nergie. Et comme l&rsquo;explique Behzad Tahmasebzadeh, cette d\u00e9couverte semble \u00eatre unique : <\/p>\n<p class=\"bodytext\">\u00ab\u00a0NGC 4486B semble \u00eatre le premier syst\u00e8me pr\u00e9sentant de multiples signatures observables d&rsquo;une fusion r\u00e9cente de SMBH&#13;<\/p>\n<p class=\"bodytext\">Cependant, les astronomes ont \u00e9galement fait une autre d\u00e9couverte. En effet, ce trou noir devrait revenir au centre de sa galaxie dans environ 30 millions d&rsquo;ann\u00e9es. Il faudra donc \u00e9tudier cette galaxie \u00e0 l&rsquo;avenir pour mieux comprendre ce type de ph\u00e9nom\u00e8ne et \u00e9lucider certains myst\u00e8res.<\/p>\n","protected":false},"excerpt":{"rendered":"Depuis plus de 30 ans, les astronomes observent et \u00e9tudient la galaxie elliptique NGC 4486B. Mais de nouvelles&hellip;\n","protected":false},"author":2,"featured_media":74942,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[70],"tags":[10,30737,9321,2681,3485,12,13,18,17,10022,1918,30738,30736,1289,30735,1285,1287,1286,73,71,75,72,76,74,8479,1288,3106,30734],"class_list":{"0":"post-74941","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-sciences-et-technologies","8":"tag-actualites","9":"tag-amas-de-la-vierge","10":"tag-astro","11":"tag-astronomie","12":"tag-astrophysique","13":"tag-be","14":"tag-be-fr","15":"tag-belgique","16":"tag-belgium","17":"tag-collision","18":"tag-espace","19":"tag-fusion","20":"tag-galaxie-elliptique","21":"tag-informations-sur-des-ordinateurs-portatifs","22":"tag-ngc4486b","23":"tag-nouvelles","24":"tag-rapport","25":"tag-revues","26":"tag-science","27":"tag-science-and-technology","28":"tag-sciences","29":"tag-sciences-et-technologies","30":"tag-technologies","31":"tag-technology","32":"tag-telescope-spatial-james-webb","33":"tag-test","34":"tag-trou-noir","35":"tag-trou-noir-supermassif"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@be_fr\/116407928456030327","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/be-fr\/wp-json\/wp\/v2\/posts\/74941","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/be-fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/be-fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/be-fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/be-fr\/wp-json\/wp\/v2\/comments?post=74941"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/be-fr\/wp-json\/wp\/v2\/posts\/74941\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/be-fr\/wp-json\/wp\/v2\/media\/74942"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/be-fr\/wp-json\/wp\/v2\/media?parent=74941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/be-fr\/wp-json\/wp\/v2\/categories?post=74941"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/be-fr\/wp-json\/wp\/v2\/tags?post=74941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}