{"id":96009,"date":"2024-07-14T17:26:23","date_gmt":"2024-07-14T15:26:23","guid":{"rendered":"https:\/\/www.astb.se\/cassiopeiabloggen\/?p=96009"},"modified":"2024-07-14T17:33:19","modified_gmt":"2024-07-14T15:33:19","slug":"nr-48-2024","status":"publish","type":"post","link":"https:\/\/www.astb.se\/cassiopeiabloggen\/2024\/07\/14\/nr-48-2024\/","title":{"rendered":"Nr 48 2024"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">&#8220;Penguinen&#8221; och &#8220;\u00c4gget&#8221; kraschar<\/h2>\n\n\n\n<p>Galaxer som interagerar, till och med kolliderar, tillh\u00f6r de kanske mest sp\u00e4nnande &#8220;trafikolyckorna&#8221; i v\u00e5rt universum. Obegripiligt stora gravitationskrafter \u00e4r i spel, vilket senast bevisas av JWST:s bildbevis av Arp 142-objektet, en sammanslagning av NGC 2936 (&#8220;Penquinen&#8221;, i ett tidigare liv en spiralformad galax) och NGC 2937 (&#8220;\u00c4gget&#8221;, en gammal elliptisk galax) &#8211; den f\u00f6rsta passagen \u00e4gde rum f\u00f6r 25-75 miljoner \u00e5r sedan. Om hundratals miljoner \u00e5r sl\u00e5r de  ihop sig en g\u00e5ng f\u00f6r alla och blir d\u00e5 en superstor galax,<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"nv-iframe-embed\"><iframe title=\"Zoom into interacting galaxies Arp 142\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/AgXVQUbNHCQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Webb-forskarnas <a href=\"https:\/\/esawebb.org\/news\/weic2420\/?lang\" title=\"\">pressrelis finnas h\u00e4r.<\/a> I den f\u00f6rklaras varf\u00f6r galaxerna ser ut som de g\u00f6r, vad f\u00e4rgkodningen tyder p\u00e5 och vad som mer finns att se i bilderna s\u00e4rskilt i infrar\u00f6tt.<\/p>\n\n\n\n<p>Arp 142 ing\u00e5r i den amerikanske astronomen <strong>Halton Arps <\/strong><em>Atlas of Peculiar Galaxies<\/em>, som publicerades 1966. I denna katalog beskrivs de b\u00e4gge NGC-objekten och den kantst\u00e4llda galaxen uppe t h som utg\u00f6rande en &#8220;triplett&#8221;, vilket v\u00e4l antyder att  Arp trodde att alla tre sam\u00e5ker i v\u00e4rldsrymden. <a href=\"https:\/\/arxiv.org\/pdf\/1907.02193\" title=\"\">En spektroskopisk studie<\/a> av sydamerikanska astronomer publicerad 2019 visade dock f\u00f6ljande: <\/p>\n\n\n\n<p>&#8220;From the several emission-lines, we could obtain a radial velocity for this galaxy of 4971\u00b118 km s\u22121, which is \u223c 2000 km s\u22121 different from the Arp 142 system. Therefore we conclude that this galaxy cannot be the disturbing agent that caused the morphological and kinematic changes of NGC 2936.&#8221;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Astrokartografen Wil Tirion har avlidit<\/h2>\n\n\n\n<p>Tack till <strong>Christian Vestergaard<\/strong> som rapporterar att<strong> Wil Tirion<\/strong>, medskapare tillsammans med <strong>Roger W Sinnott <\/strong>av stj\u00e4rnbildatlasen <em>SkyAtlas 2000.0<\/em>, g\u00e5tt ur tiden. <\/p>\n\n\n\n<p> Wil Tirion blev 81 \u00e5r gammal.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hawaii-observatorium ett minne blott<\/h2>\n\n\n\n<p>Caltechs<a href=\"http:\/\/cso.caltech.edu\/\"> Submillimeter Observatory<\/a>&nbsp;(CSO), inklusive dess grund, dess geodetiska dom och \u00f6vriga byggnader har nu monterats ner p\u00e5 Maunakea p\u00e5 Hawaii. Nu \u00e5terst\u00e5r att f\u00f6lja hur naturen, faunan och floran, tar tillbaka omr\u00e5det.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.caltech.edu\/about\/news\/caltechs-submillimeter-observatory-has-been-removed-from-maunakea?utm_medium=email&amp;utm_campaign=institute-news&amp;utm_source=weekly-newsletter&amp;utm_content=&amp;utm_term=\" title=\"\">Rapport h\u00e4r.<\/a><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"nv-iframe-embed\"><iframe title=\"CSO Dome Removal Timelapse (2024)\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/ukRyjvZbNeM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Teleskopet ska med tiden flyttas till en ny plats i Chile.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;Penguinen&#8221; och &#8220;\u00c4gget&#8221; kraschar Galaxer som interagerar, till och med kolliderar, tillh\u00f6r de kanske mest sp\u00e4nnande &#8220;trafikolyckorna&#8221; i v\u00e5rt universum. Obegripiligt stora gravitationskrafter \u00e4r i spel, vilket senast bevisas av JWST:s bildbevis av Arp 142-objektet, en sammanslagning av NGC 2936 (&#8220;Penquinen&#8221;, i ett tidigare liv en spiralformad galax) och NGC 2937 (&#8220;\u00c4gget&#8221;, en gammal elliptisk&hellip;&nbsp;<a href=\"https:\/\/www.astb.se\/cassiopeiabloggen\/2024\/07\/14\/nr-48-2024\/\" rel=\"bookmark\">L\u00e4s mer &raquo;<span class=\"screen-reader-text\">Nr 48 2024<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[3],"tags":[],"_links":{"self":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/96009"}],"collection":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/comments?post=96009"}],"version-history":[{"count":20,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/96009\/revisions"}],"predecessor-version":[{"id":96029,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/96009\/revisions\/96029"}],"wp:attachment":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/media?parent=96009"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/categories?post=96009"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/tags?post=96009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}