{"id":64938,"date":"2025-01-20T12:00:00","date_gmt":"2025-01-20T12:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/senegal\/politique\/une-image-spectaculaire-de-lamas-dantlia-devoilee-par-une-camera-a-energie-noire"},"modified":"2025-01-20T12:00:00","modified_gmt":"2025-01-20T12:00:00","slug":"une-image-spectaculaire-de-lamas-dantlia-devoilee-par-une-camera-a-energie-noire","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/une-image-spectaculaire-de-lamas-dantlia-devoilee-par-une-camera-a-energie-noire","title":{"rendered":"Une Image Spectaculaire de L\u2019Amas D\u2019Antlia D\u00e9voil\u00e9e par une Cam\u00e9ra \u00e0 \u00c9nergie Noire"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Senegal. <\/strong><\/span>L\u2019amas de galaxies d\u2019Antlia est situe\u0301 a\u0300 environ 130 millions d\u2019anne\u0301es-lumie\u0300re de la Terre, dans la constellation de la Machine pneumatique (visible dans l\u2019he\u0301misphe\u0300re sud). Gra\u0302ce a\u0300 la Dark Energy Camera (DECam), une came\u0301ra de 570 me\u0301gapixels monte\u0301e sur le te\u0301lescope Vi\u0301ctor M. Blanco au Chili, les astronomes ont obtenu une image d\u2019une profondeur exceptionnelle de cet amas, de\u0301voilant des centaines de galaxies dans l\u2019amas et en arrie\u0300re-plan de ce dernier.<\/p>\n<p><b>Un aperc\u0327u de\u0301taille\u0301 d\u2019un amas riche en galaxies<\/b><\/p>\n<p>L\u2019amas d\u2019Antlia, e\u0301galement connu sous le nom Abell S636, est compose\u0301 d\u2019environ 230 galaxies connues. Cette structure est domine\u0301e par deux galaxies elliptiques massives, NGC 3268 et NGC 3258, qui pourraient e\u0302tre en train de fusionner. Les observations en rayons X montrent une concentration de globules lumineux entre elles, sugge\u0301rant une collision entre deux sous-amas plus petits.<\/p>\n<p>La diversite\u0301 des galaxies dans l\u2019amas d\u2019Antlia est remarquable: on y trouve des galaxies lenticulaires, caracte\u0301rise\u0301es par leur faible activite\u0301 de formation d\u2019e\u0301toiles, ainsi que des galaxies naines ultra-compactes, des elliptiques compactes, et des naines bleues compactes. L\u2019amas pourrait aussi abriter des galaxies ultra-diffuses et sphe\u0301roi\u0308dales naines, bien que ces hypothe\u0300ses ne\u0301cessitent des e\u0301tudes plus approfondies. Ces observations re\u0301ve\u0300lent la complexite\u0301 des interactions gravitationnelles qui s\u2019y produisent et leurs impacts sur la structure des galaxies.<\/p>\n<p><b>Des implications pour l\u2019e\u0301tude de la matie\u0300re noire<\/b><\/p>\n<p>Les amas de galaxies comme celui d\u2019Antlia offrent des opportunite\u0301s uniques pour explorer la matie\u0300re noire, cette myste\u0301rieuse entite\u0301 qui repre\u0301sente environ 25 % de l\u2019Univers. En effet, selon les mode\u0300les astrophysiques, ce sont des amas de matie\u0300re noire qui sont a\u0300 l\u2019origine de ces concentrations de galaxies. Les travaux sur l\u2019amas d\u2019Antlia s\u2019inte\u0300grent dans une collaboration internationale impliquant des te\u0301lescopes terrestres et spatiaux, dont le futur observatoire Vera C. Rubin. Ce dernier devrait fournir des donne\u0301es encore plus pre\u0301cises sur la distribution de la matie\u0300re noire et sur l\u2019e\u0301volution des structures galactiques a\u0300 grande e\u0301chelle.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <span style=\"color: #ff6600\">Senegal<\/span>, suivez <span style=\"color: #ff6600\">Africa-Press<span style=\"color: #ff6600\"><\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Senegal. L\u2019amas de galaxies d\u2019Antlia est situe\u0301 a\u0300 environ 130 millions d\u2019anne\u0301es-lumie\u0300re de la Terre, dans la constellation de la Machine pneumatique (visible dans l\u2019he\u0301misphe\u0300re sud). Gra\u0302ce a\u0300 la Dark Energy Camera (DECam), une came\u0301ra de 570 me\u0301gapixels monte\u0301e sur le te\u0301lescope Vi\u0301ctor M. Blanco au Chili, les astronomes ont obtenu une image [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":64937,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[44],"class_list":["post-64938","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-senegal-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Une Image Spectaculaire de L\u2019Amas D\u2019Antlia D\u00e9voil\u00e9e par une Cam\u00e9ra \u00e0 \u00c9nergie Noire - Senegal<\/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.africa-press.net\/senegal\/politique\/une-image-spectaculaire-de-lamas-dantlia-devoilee-par-une-camera-a-energie-noire\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Une Image Spectaculaire de L\u2019Amas D\u2019Antlia D\u00e9voil\u00e9e par une Cam\u00e9ra \u00e0 \u00c9nergie Noire\" \/>\n<meta property=\"og:description\" content=\"Africa-Press &#8211; Senegal. L\u2019amas de galaxies d\u2019Antlia est situe\u0301 a\u0300 environ 130 millions d\u2019anne\u0301es-lumie\u0300re de la Terre, dans la constellation de la Machine pneumatique (visible dans l\u2019he\u0301misphe\u0300re sud). Gra\u0302ce a\u0300 la Dark Energy Camera (DECam), une came\u0301ra de 570 me\u0301gapixels monte\u0301e sur le te\u0301lescope Vi\u0301ctor M. 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