{"id":24165,"date":"2023-07-11T13:27:00","date_gmt":"2023-07-11T12:27:00","guid":{"rendered":"https:\/\/www.istegroup.com\/?post_type=product&#038;p=24165"},"modified":"2025-01-03T11:08:41","modified_gmt":"2025-01-03T11:08:41","slug":"noyaux-actifs-de-galaxie","status":"publish","type":"product","link":"https:\/\/www.istegroup.com\/fr\/produit\/noyaux-actifs-de-galaxie\/","title":{"rendered":"Noyaux actifs de galaxie"},"content":{"rendered":"<p>Pratiquement toutes les galaxies h\u00e9bergent un trou noir supermassif en leur centre. Ces trous noirs croissent en masse en symbiose avec leur galaxie h\u00f4te et mod\u00e8rent leur formation d\u2019\u00e9toiles. Lorsque la mati\u00e8re est entra\u00een\u00e9e vers le noyau de la galaxie, un disque d\u2019accr\u00e9tion se forme, o\u00f9 le moment cin\u00e9tique est transf\u00e9r\u00e9 vers l\u2019ext\u00e9rieur. Une \u00e9nergie consid\u00e9rable est lib\u00e9r\u00e9e lorsque la mati\u00e8re tombe dans le trou noir : c\u2019est le ph\u00e9nom\u00e8ne des noyaux actifs de galaxie (AGN). Un noyau peut briller mille fois plus que la galaxie enti\u00e8re avec ses 200 milliards d\u2019\u00e9toiles. L\u2019activit\u00e9 nucl\u00e9aire peut prendre de nombreuses formes, des quasars tr\u00e8s puissants aux galaxies de Seyfert plus ordinaires, en passant par les radio-galaxies, qui peuvent lancer des jets jusqu\u2019\u00e0 dix fois le rayon de la galaxie.<\/p>\n<p><em>Noyaux actifs de galaxie<\/em> examine toutes ces manifestations et pr\u00e9sente une vue unifi\u00e9e des AGN. Lorsque deux galaxies fusionnent, un trou noir binaire se forme et les deux trous noirs spiralent l\u2019un vers l\u2019autre pour fusionner, \u00e9mettant des ondes gravitationnelles d\u00e9tectables par le futur satellite LISA.<\/p>","protected":false},"excerpt":{"rendered":"<p>Pratiquement toutes les galaxies h\u00e9bergent un trou noir supermassif en leur centre. Ces trous noirs croissent en masse en symbiose avec leur galaxie h\u00f4te et mod\u00e8rent leur formation d\u2019\u00e9toiles. Lorsque la mati\u00e8re est entra\u00een\u00e9e vers le noyau de la galaxie, un disque d\u2019accr\u00e9tion se forme, o\u00f9 le moment cin\u00e9tique est transf\u00e9r\u00e9 vers l\u2019ext\u00e9rieur. Une \u00e9nergie [&hellip;]<\/p>\n","protected":false},"featured_media":52346,"template":"","meta":{"_acf_changed":false,"_links_to":"","_links_to_target":""},"product_brand":[],"product_cat":[4289],"product_tag":[],"class_list":{"0":"post-24165","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-sciences","8":"first","9":"instock","10":"shipping-taxable","11":"purchasable","12":"product-type-variable"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Noyaux actifs de galaxie - ISTE Group<\/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.istegroup.com\/fr\/produit\/noyaux-actifs-de-galaxie\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Noyaux actifs de galaxie - ISTE Group\" \/>\n<meta property=\"og:description\" content=\"Pratiquement toutes les galaxies h\u00e9bergent un trou noir supermassif en leur centre. Ces trous noirs croissent en masse en symbiose avec leur galaxie h\u00f4te et mod\u00e8rent leur formation d\u2019\u00e9toiles. Lorsque la mati\u00e8re est entra\u00een\u00e9e vers le noyau de la galaxie, un disque d\u2019accr\u00e9tion se forme, o\u00f9 le moment cin\u00e9tique est transf\u00e9r\u00e9 vers l\u2019ext\u00e9rieur. 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