{"id":9078,"date":"2018-05-13T16:41:01","date_gmt":"2018-05-13T16:41:01","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=9078"},"modified":"2018-05-28T05:20:08","modified_gmt":"2018-05-28T05:20:08","slug":"chime-radiotelescope-canadien-traque-lenergie-noire","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/","title":{"rendered":"Chime, le radiot\u00e9lescope qui traque l&#8217;\u00e9nergie noire"},"content":{"rendered":"<p><strong>Inaugur\u00e9 en septembre 2017, le radiot\u00e9lescope canadien Chime va \u00e9tudier la fa\u00e7on dont \u00e9tait r\u00e9parti l&#8217;hydrog\u00e8ne dans l&#8217;Univers il y a plusieurs milliards d&#8217;ann\u00e9es.<\/strong><\/p>\n<p>Compos\u00e9 de quatre r\u00e9flecteurs cylindriques de 100 m de long et 20 de large, l&#8217;instrument Chime (<a href=\"https:\/\/chime-experiment.ca\/\" target=\"_blank\" rel=\"noopener\"><em>Canadian Hydrogen Intensity Mapping Experiment<\/em><\/a>, ce qui signifie\u00a0Exp\u00e9rience canadienne de cartographie de l&#8217;intensit\u00e9 de l&#8217;hydrog\u00e8ne)\u00a0est un tout nouveau radiot\u00e9lescope interf\u00e9rom\u00e8tre install\u00e9 dans la vall\u00e9e de l\u2019Okanagan en Colombie-Britannique et g\u00e9r\u00e9 par trois universit\u00e9s (Colombie-Britannique\/McGill\/Toronto) et l&#8217;Observatoire f\u00e9d\u00e9ral de radioastrophysique.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime.jpg\" rel=\"lightbox[9078]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9079\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime-450x273.jpg\" alt=\"\" width=\"450\" height=\"273\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime-450x273.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime-768x466.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime-1024x621.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime.jpg 1200w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Les donn\u00e9es fournies par 1.024 r\u00e9cepteurs radio sensibles \u00e0 des fr\u00e9quences de 400 \u00e0 800 MHz sont trait\u00e9es par 256 ordinateurs \u00e9quip\u00e9s simplement de puissantes cartes pour jeux vid\u00e9o, ce qui donne \u00e0 Chime\u00a0l\u2019avantage de n\u2019avoir co\u00fbt\u00e9 que 16 millions de dollars, beaucoup moins que <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/07\/28\/le-plus-grand-radiotelescope-du-monde-sera-chinois\/\" target=\"_blank\" rel=\"noopener\">FAST<\/a> ou <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/11\/14\/antennes-dalma-vert-voie-lactee\/\" target=\"_blank\" rel=\"noopener\">ALMA<\/a> .\u00a0 \u00a0<!--more--><\/p>\n<p>Si ce radiot\u00e9lescope a \u00e9t\u00e9 optimis\u00e9 pour des longueurs d&#8217;onde comprises entre 75 et 38 cm, c&#8217;est tout simplement parce que c&#8217;est l\u00e0 qu&#8217;on retrouve la c\u00e9l\u00e8bre bande de 21 cm de l&#8217;hydrog\u00e8ne neutre lorsqu&#8217;elle a subi un d\u00e9calage qui correspond \u00e0 une Univers \u00e2g\u00e9 de 2.5 \u00e0 7 milliards d&#8217;ann\u00e9es.<\/p>\n<p>C&#8217;est \u00e0 ce moment que l&#8217;\u00e9nergie noire (cette composante hypoth\u00e9tique que les cosmologistes ont imagin\u00e9 pour tenter d&#8217;expliquer l&#8217;acc\u00e9l\u00e9ration de l&#8217;expansion cosmique) aurait commenc\u00e9 \u00e0 jouer un r\u00f4le important. Chime va permettre d&#8217;\u00e9tudier les effets des oscillations acoustiques baryoniques (<em>baryon acoustic oscillations<\/em>) sur la distribution de l&#8217;hydrog\u00e8ne neutre. Les BAO sont des coquilles sph\u00e9riques de mati\u00e8re plus dense provoqu\u00e9es par des ondes sonores apparues dans l&#8217;Univers primitif suite \u00e0 des fluctuations de densit\u00e9 de la mati\u00e8re noire.<\/p>\n<p>Chime \u00e9tudiera \u00e9galement les pulsars,\u00a0des \u00e9toiles \u00e0 neutrons tournant tr\u00e8s rapidement sur elles-m\u00eames et produisant un signal p\u00e9riodique, ainsi que de curieux sursauts radio rapides, les <em>fast radio burst<\/em>, de brefs mais tr\u00e8s puissants signaux radio\u00e9lectriques dont l&#8217;origine est encore inconnue.<\/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>Inaugur\u00e9 en septembre 2017, le radiot\u00e9lescope canadien Chime va \u00e9tudier la fa\u00e7on dont \u00e9tait r\u00e9parti l&#8217;hydrog\u00e8ne dans l&#8217;Univers il y a plusieurs milliards d&#8217;ann\u00e9es. Compos\u00e9 de quatre r\u00e9flecteurs cylindriques de 100 m de long et 20 de large, l&#8217;instrument Chime (Canadian Hydrogen Intensity Mapping Experiment, ce qui signifie\u00a0Exp\u00e9rience canadienne de cartographie de l&#8217;intensit\u00e9 de l&#8217;hydrog\u00e8ne)\u00a0est &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Chime, le radiot\u00e9lescope qui traque l&#8217;\u00e9nergie noire<\/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":9079,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[2502,1002,2499,2504,1215,2501,2500,2503,399,769],"class_list":["post-9078","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-baryon-acoustic-oscillations","tag-canada","tag-chime","tag-colombie-britannique","tag-energie-noire","tag-fast-radio-burst","tag-hydrogene-neutre","tag-okanagran","tag-pulsar","tag-radiotelescope"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Chime, le radiot\u00e9lescope qui traque l&#039;\u00e9nergie noire<\/title>\n<meta name=\"description\" content=\"Inaugur\u00e9 en septembre 2017, le radiot\u00e9lescope canadien Chime va \u00e9tudier la fa\u00e7on dont \u00e9tait r\u00e9parti l&#039;hydrog\u00e8ne dans l&#039;Univers il y a plusieurs milliards d&#039;ann\u00e9es.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Chime, le radiot\u00e9lescope qui traque l&#039;\u00e9nergie noire\" \/>\n<meta property=\"og:description\" content=\"Inaugur\u00e9 en septembre 2017, le radiot\u00e9lescope canadien Chime va \u00e9tudier la fa\u00e7on dont \u00e9tait r\u00e9parti l&#039;hydrog\u00e8ne dans l&#039;Univers il y a plusieurs milliards d&#039;ann\u00e9es.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2018-05-13T16:41:01+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2018-05-28T05:20:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"728\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Jean-Baptiste FELDMANN\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jean-Baptiste FELDMANN\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/\",\"name\":\"Chime, le radiot\u00e9lescope qui traque l'\u00e9nergie noire\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime.jpg\",\"datePublished\":\"2018-05-13T16:41:01+00:00\",\"dateModified\":\"2018-05-28T05:20:08+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\"},\"description\":\"Inaugur\u00e9 en septembre 2017, le radiot\u00e9lescope canadien Chime va \u00e9tudier la fa\u00e7on dont \u00e9tait r\u00e9parti l'hydrog\u00e8ne dans l'Univers il y a plusieurs milliards d'ann\u00e9es.\",\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime.jpg\",\"width\":1200,\"height\":728},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/\",\"name\":\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\",\"description\":\"&quot;J&#039;ai en moi un besoin terrible. Dirais-je le mot? La religion. Alors, je sors la nuit et je peins des \u00e9toiles.&quot;  Vincent van Gogh\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\",\"name\":\"Jean-Baptiste FELDMANN\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g\",\"caption\":\"Jean-Baptiste FELDMANN\"},\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/author\/jbfe\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Chime, le radiot\u00e9lescope qui traque l'\u00e9nergie noire","description":"Inaugur\u00e9 en septembre 2017, le radiot\u00e9lescope canadien Chime va \u00e9tudier la fa\u00e7on dont \u00e9tait r\u00e9parti l'hydrog\u00e8ne dans l'Univers il y a plusieurs milliards d'ann\u00e9es.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/","og_locale":"fr_FR","og_type":"article","og_title":"Chime, le radiot\u00e9lescope qui traque l'\u00e9nergie noire","og_description":"Inaugur\u00e9 en septembre 2017, le radiot\u00e9lescope canadien Chime va \u00e9tudier la fa\u00e7on dont \u00e9tait r\u00e9parti l'hydrog\u00e8ne dans l'Univers il y a plusieurs milliards d'ann\u00e9es.","og_url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/","og_site_name":"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel","article_published_time":"2018-05-13T16:41:01+00:00","article_modified_time":"2018-05-28T05:20:08+00:00","og_image":[{"width":1200,"height":728,"url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime.jpg","type":"image\/jpeg"}],"author":"Jean-Baptiste FELDMANN","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"Jean-Baptiste FELDMANN","Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/","name":"Chime, le radiot\u00e9lescope qui traque l'\u00e9nergie noire","isPartOf":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/#primaryimage"},"image":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/#primaryimage"},"thumbnailUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime.jpg","datePublished":"2018-05-13T16:41:01+00:00","dateModified":"2018-05-28T05:20:08+00:00","author":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea"},"description":"Inaugur\u00e9 en septembre 2017, le radiot\u00e9lescope canadien Chime va \u00e9tudier la fa\u00e7on dont \u00e9tait r\u00e9parti l'hydrog\u00e8ne dans l'Univers il y a plusieurs milliards d'ann\u00e9es.","inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/13\/chime-radiotelescope-canadien-traque-lenergie-noire\/#primaryimage","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime.jpg","contentUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/03\/chime.jpg","width":1200,"height":728},{"@type":"WebSite","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#website","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/","name":"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel","description":"&quot;J&#039;ai en moi un besoin terrible. Dirais-je le mot? La religion. Alors, je sors la nuit et je peins des \u00e9toiles.&quot;  Vincent van Gogh","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blogs.futura-sciences.com\/feldmann\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea","name":"Jean-Baptiste FELDMANN","image":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g","caption":"Jean-Baptiste FELDMANN"},"url":"https:\/\/blogs.futura-sciences.com\/feldmann\/author\/jbfe\/"}]}},"_links":{"self":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/9078","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/comments?post=9078"}],"version-history":[{"count":4,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/9078\/revisions"}],"predecessor-version":[{"id":9232,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/9078\/revisions\/9232"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media\/9079"}],"wp:attachment":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media?parent=9078"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/categories?post=9078"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/tags?post=9078"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}