{"id":4590,"date":"2015-12-24T08:03:35","date_gmt":"2015-12-24T08:03:35","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=4590"},"modified":"2016-01-05T05:53:22","modified_gmt":"2016-01-05T05:53:22","slug":"arp-116-un-etrange-couple-de-galaxies-dans-la-vierge","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/12\/24\/arp-116-un-etrange-couple-de-galaxies-dans-la-vierge\/","title":{"rendered":"Arp 116, un \u00e9trange couple de galaxies dans la Vierge"},"content":{"rendered":"<p><strong>La galaxie elliptique g\u00e9ante Messier 60 et la galaxie spirale NGC 4647 forment un surprenant duo, Arp 116, que vient de photographier le t\u00e9lescope CFHT.<\/strong><\/p>\n<p>Les astronomes connaissent bien l&#8217;amas de la Vierge, une concentration de plus de 1.500 galaxies assez proches de nous (entre 50 et 70 millions d&#8217;ann\u00e9es-lumi\u00e8re) qui fut d\u00e9couverte par Charles Messier \u00e0 la fin du XVIIIe si\u00e8cle.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/12\/arp.jpg\" rel=\"lightbox[4590]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4591\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/12\/arp-387x450.jpg\" alt=\"arp\" width=\"387\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/12\/arp-387x450.jpg 387w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/12\/arp.jpg 717w\" sizes=\"auto, (max-width: 387px) 100vw, 387px\" \/><\/a><\/p>\n<p>Charles Messier classa les 16 plus brillantes de ces galaxies dans son c\u00e9l\u00e8bre catalogue. Messier 60 est une galaxie elliptique g\u00e9ante (diam\u00e8tre de 120.000 ann\u00e9es-lumi\u00e8re) situ\u00e9e \u00e0 54 millions d&#8217;ann\u00e9es-lumi\u00e8re. Le clich\u00e9 ci-dessus a \u00e9t\u00e9 r\u00e9alis\u00e9 par le t\u00e9lescope CFTH (<em><a href=\"http:\/\/www.cfht.hawaii.edu\/\" target=\"_blank\">Canada-France-Hawaii Telescope<\/a><\/em>) install\u00e9 au sommet du <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/21\/la-lumiere-zodiacale-en-majeste-sur-le-mauna-kea\/\" target=\"_blank\">Mauna Kea<\/a>.<\/p>\n<p><!--more-->Messier 60 correspond \u00e0 la grosse n\u00e9bulosit\u00e9 qui occupe la plus grande partie de l&#8217;image : les \u00e9toiles \u00e2g\u00e9es se d\u00e9placent de fa\u00e7on al\u00e9atoire autour du noyau de la galaxie, d&#8217;o\u00f9 cet aspect n\u00e9buleux.<\/p>\n<p>En retrait de 10 millions d&#8217;ann\u00e9es-lumi\u00e8re se trouve NGC 4647 (une galaxie spirale assez semblable \u00e0 <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/11\/26\/gros-plan-sur-la-majestueuse-galaxie-spirale-ngc-6118\/\" target=\"_blank\">NGC 6118<\/a>) dont le diam\u00e8tre avoisine 90.000 ann\u00e9es-lumi\u00e8re. Sa forme caract\u00e9ristique avec des bras spiraux remplis de jeunes \u00e9toiles bleues, de poussi\u00e8re et de gaz se remarque l\u00e9g\u00e8rement au-dessus et \u00e0 droite du bulbe central de Messier 60.<\/p>\n<p>Ces deux galaxies, qui entreront peut-\u00eatre un jour en collision, portent \u00e9galement le nom de Arp 116 dans le catalogue\u00a0<em><a href=\"https:\/\/ned.ipac.caltech.edu\/level5\/Arp\/Arp_contents.html\" target=\"_blank\">Atlas of Peculiar Galaxies<\/a> <\/em>(qui compte 338 galaxies particuli\u00e8res)<em>\u00a0<\/em>publi\u00e9 en 1966 par l&#8217;astronome am\u00e9ricain Halton Arp.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>La galaxie elliptique g\u00e9ante Messier 60 et la galaxie spirale NGC 4647 forment un surprenant duo, Arp 116, que vient de photographier le t\u00e9lescope CFHT. Les astronomes connaissent bien l&#8217;amas de la Vierge, une concentration de plus de 1.500 galaxies assez proches de nous (entre 50 et 70 millions d&#8217;ann\u00e9es-lumi\u00e8re) qui fut d\u00e9couverte par Charles &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/12\/24\/arp-116-un-etrange-couple-de-galaxies-dans-la-vierge\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Arp 116, un \u00e9trange couple de galaxies dans la Vierge<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":4591,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[1425,113,1429,1229,1430,1427,1428,1426],"class_list":["post-4590","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-arp-116","tag-constellation-de-la-vierge","tag-galaxie-elliptique","tag-galaxie-spirale","tag-halton-arp","tag-messier-60","tag-ngc-4647","tag-telescope-cfht"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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