{"id":83092,"date":"2020-02-15T21:01:41","date_gmt":"2020-02-15T20:01:41","guid":{"rendered":"http:\/\/www.astb.se\/cassiopeiabloggen\/?p=83092"},"modified":"2020-02-15T21:17:06","modified_gmt":"2020-02-15T20:17:06","slug":"nr-12-2020","status":"publish","type":"post","link":"https:\/\/www.astb.se\/cassiopeiabloggen\/2020\/02\/15\/nr-12-2020\/","title":{"rendered":"Nr 12 2020"},"content":{"rendered":"\n

Den deformerade Betelgeuse<\/strong><\/h2>\n\n\n\n

Senaste nytt om Betelgeuse: Den r\u00f6da j\u00e4ttestj\u00e4rnan har kraftigt f\u00f6r\u00e4ndrats, vilket f\u00f6rklarar ljusminskningen sedd fr\u00e5n oss jordbor.<\/p>\n\n\n\n

Betelgeuse har hittills, ber\u00e4ttar ett ESO-mess,<\/a> f\u00f6rlorat 36 procent av sitt ljus j\u00e4mf\u00f6rt med normall\u00e4get (vad det nu \u00e4r). Med hj\u00e4lp av j\u00e4ttemaskinen Very Large Telescope med specialinstrumentering har ESO-astronomerna f\u00e5ngat in det aktuella skeendet. <\/p>\n\n\n\n

Stj\u00e4rnan tycks ha deformerats under processen, och tv\u00e5 hypotester har lyfts fram: Att yttemperaturen sjunker till f\u00f6ljd av “exceptional stellar activity” eller att stoft, damm, sl\u00e4ngts ut fr\u00e5n stj\u00e4rnan mot oss.<\/p>\n\n\n\n

Sp\u00e4nnande \u00e4r det, \u00e4ven om ESO-astronomerna ber oss  d\u00e4mpa supernova-spekulationerna en smula. Tids nog spr\u00e4ngs Betelgeuse, men det kan ta hundratusentals \u00e5r.<\/p>\n\n\n\n

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F\u00f6r\u00e4ndringen p\u00e5 Betelgeuse \u00e4r tydlig h\u00e4r p\u00e5 en dokumentation med hj\u00e4lp av instrumentet SPHERE p\u00e5 ESO:s Very Large Telescope. Bildk\u00e4lla: ESO\/M. Montarg\u00e8s et al.<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n
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Skillnaden mellan december 2019 och januari 2019. Bildk\u00e4lla: ESO\/M. Montarg\u00e8s et al.<\/em><\/figcaption><\/figure>\n

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

VISIR-instrumentet p\u00e5 VLT visar i infrar\u00f6tt det gigantiska stoftet\u00a0 runt Betelgeuse i december 2019.\u00a0Stj\u00e4rnan har maskats av optiska synbarhetssk\u00e4l – den lilla pricken i mitten \u00e4r Betelgeuses yta, som har en storlek ungef\u00e4r motsvarande Jupiters bana. Bildk\u00e4lla: ESO\/P. Kervella\/M. Montarg\u00e8s et al., Acknowledgement: Eric Pantin<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Den deformerade Betelgeuse Senaste nytt om Betelgeuse: Den r\u00f6da j\u00e4ttestj\u00e4rnan har kraftigt f\u00f6r\u00e4ndrats, vilket f\u00f6rklarar ljusminskningen sedd fr\u00e5n oss jordbor. Betelgeuse har hittills, ber\u00e4ttar ett ESO-mess, f\u00f6rlorat 36 procent av sitt ljus j\u00e4mf\u00f6rt med normall\u00e4get (vad det nu \u00e4r). Med hj\u00e4lp av j\u00e4ttemaskinen Very Large Telescope med specialinstrumentering har ESO-astronomerna f\u00e5ngat in det aktuella skeendet.… L\u00e4s mer »Nr 12 2020<\/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\/83092"}],"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=83092"}],"version-history":[{"count":13,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/83092\/revisions"}],"predecessor-version":[{"id":83108,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/83092\/revisions\/83108"}],"wp:attachment":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/media?parent=83092"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/categories?post=83092"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/tags?post=83092"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}