{"id":3191,"date":"2015-07-30T06:29:07","date_gmt":"2015-07-30T06:29:07","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=3191"},"modified":"2015-08-10T08:18:54","modified_gmt":"2015-08-10T08:18:54","slug":"herbig-haro-110-un-geyser-de-gaz-chaud-dans-orion","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/07\/30\/herbig-haro-110-un-geyser-de-gaz-chaud-dans-orion\/","title":{"rendered":"Herbig-Haro 110, un geyser de gaz chaud dans Orion"},"content":{"rendered":"

N\u00e9bulosit\u00e9s gazeuses \u00e9chapp\u00e9es de jeunes \u00e9toiles, les objets Herbig-Haro prennent parfois une dr\u00f4le d’apparence, comme le prouve HH 110.<\/strong><\/p>\n

C’est \u00e0 la fin des ann\u00e9es 1940 que les astronomes <\/a>George Herbig et Guillermo Haro s’int\u00e9ress\u00e8rent \u00e0 une s\u00e9rie de petites n\u00e9bulosit\u00e9s qui se trouvaient syst\u00e9matiquement \u00e0 c\u00f4t\u00e9 de tr\u00e8s jeunes \u00e9toiles<\/a> (\u00e2g\u00e9es de seulement quelques centaines de milliers d’ann\u00e9es).<\/p>\n

George Herbig et Guillermo Haro avaient \u00e9t\u00e9 pr\u00e9c\u00e9d\u00e9s par leur compatriote\u00a0Sherburne Wesley Burnham qui avait d\u00e9j\u00e0 observ\u00e9 \u00e0 la fin du XIXe si\u00e8cle une petite n\u00e9bulosit\u00e9 \u00e0 proximit\u00e9\u00a0d’une jeune \u00e9toile dans la constellation du Taureau<\/a>, T Tauri.<\/p>\n

\"hh110\"<\/a><\/p>\n

Herbig et Haro remarqu\u00e8rent que ces n\u00e9buleuses <\/a>pr\u00e9sentaient les m\u00eames spectres inhabituels et qu’elles \u00e9taient invisibles en infrarouge.<\/p>\n

Les \u00e9tudes ult\u00e9rieures ont permis de mieux cerner les objets HH : form\u00e9s de la mati\u00e8re \u00e9ject\u00e9e par de jeunes \u00e9toiles proches, ils deviennent visibles par ionisation lorsqu’ils entrent en collision \u00e0 grande vitesse avec le gaz du milieu interstellaire environnant.<\/p>\n

HH 110 (photographie ci-dessus r\u00e9alis\u00e9e par le t\u00e9lescope spatial Hubble<\/a>) se situe \u00e01500 ann\u00e9es-lumi\u00e8re de la Terre dans Orion<\/a>, la plus belle constellation du ciel bor\u00e9al,\u00a0surtout connue des astronomes amateurs\u00a0<\/a>pour sa c\u00e9l\u00e8bre n\u00e9buleuse (Messier 42<\/a>). La c\u00e9l\u00e8bre constellation abrite d’autres objets Herbig-Haro, Comme HH 34 dont on peut admirer le jet en mouvement dans une\u00a0vid\u00e9o du t\u00e9lescope Hubble<\/a>.<\/p>\n

Le panache gazeux de HH 110 s’\u00e9tire sur 0,5 ann\u00e9e-lumi\u00e8re ce qui repr\u00e9sente quand m\u00eame plus de 30 000 fois la distance qui s\u00e9pare notre plan\u00e8te du Soleil<\/a>\u00a0!<\/p>\n

Quant \u00e0 la n\u00e9bulosit\u00e9 proche de l’\u00e9toile T Tauri, elle a depuis \u00e9t\u00e9 baptis\u00e9e n\u00e9buleuse de Burnham (HH 255) en hommage \u00e0 son d\u00e9couvreur.<\/p>\n","protected":false},"excerpt":{"rendered":"

N\u00e9bulosit\u00e9s gazeuses \u00e9chapp\u00e9es de jeunes \u00e9toiles, les objets Herbig-Haro prennent parfois une dr\u00f4le d’apparence, comme le prouve HH 110. C’est \u00e0 la fin des ann\u00e9es 1940 que les astronomes George Herbig et Guillermo Haro s’int\u00e9ress\u00e8rent \u00e0 une s\u00e9rie de petites n\u00e9bulosit\u00e9s qui se trouvaient syst\u00e9matiquement \u00e0 c\u00f4t\u00e9 de tr\u00e8s jeunes \u00e9toiles (\u00e2g\u00e9es de seulement quelques … Continuer la lecture de Herbig-Haro 110, un geyser de gaz chaud dans Orion<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":3192,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[354,1149,1150,111,544],"class_list":["post-3191","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-constellation-dorion","tag-herbig-haro","tag-hh-110","tag-nebuleuse","tag-telescope-spatial-hubble"],"yoast_head":"\nHerbig-Haro 110, un geyser de gaz chaud dans Orion<\/title>\n<meta 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