{"id":2606,"date":"2023-02-10T11:27:33","date_gmt":"2023-02-10T10:27:33","guid":{"rendered":"https:\/\/stel.asu.cas.cz\/cs\/?p=2606"},"modified":"2023-05-03T10:47:27","modified_gmt":"2023-05-03T08:47:27","slug":"pomalu-se-probouzejici-kraska-v838-monocerotis","status":"publish","type":"post","link":"https:\/\/stel.asu.cas.cz\/cs\/2023\/02\/10\/pomalu-se-probouzejici-kraska-v838-monocerotis\/","title":{"rendered":"Pomalu se probouzej\u00edc\u00ed kr\u00e1ska V838 Monocerotis"},"content":{"rendered":"\n<p>Hv\u011bzda V838 Monocerotis je jednou z&nbsp;nejzn\u00e1m\u011bj\u0161\u00edch hv\u011bzd v\u016fbec i&nbsp;mezi laiky, i&nbsp;kdy\u017e si toto ozna\u010den\u00ed mo\u017en\u00e1 ani neuv\u011bdomuj\u00ed. Sn\u00edmky sv\u011bteln\u00e9ho echa po jej\u00edm v\u00fdbuchu, kter\u00fd se odehr\u00e1l v&nbsp;roce 2002, se dostaly snad do v\u0161ech sd\u011blovac\u00edch prost\u0159edk\u016f. <strong>Tiina Liimets <\/strong>ze <strong>Stel\u00e1rn\u00edho odd\u011blen\u00ed ASU<\/strong> vedla t\u00fdm, kter\u00fd tuto hv\u011bzdu systematicky sledoval po v\u00edce ne\u017e 13 let. Jejich zji\u0161t\u011bn\u00ed byla p\u0159ijata k&nbsp;publikaci v&nbsp;\u010dasopise Astronomy&amp;Astrophysics.<\/p>\n\n\n\n<p>A\u017e do roku 2002 se <strong>V838 Monocerotis<\/strong> (tedy 838. zn\u00e1m\u00e1 prom\u011bnn\u00e1 hv\u011bzda v&nbsp;souhv\u011bzd\u00ed Jednoro\u017ece) v&nbsp;kataloz\u00edch v\u016fbec nevyskytovala. V&nbsp;lednu <strong>2002 v\u0161ak vybuchla<\/strong>, hv\u011bzda s&nbsp;p\u016fvodn\u00ed jasnost\u00ed z\u0159ejm\u011b n\u011bkde kolem 15 magnitud dos\u00e1hla jasnosti umo\u017e\u0148uj\u00edc\u00ed pohodlnou pozorovatelnost v&nbsp;mal\u00fdch dalekohledech, tedy 6,75 magnitud. Od po\u010d\u00e1tku se chovala jako nova a&nbsp;po zjasn\u011bn\u00ed za\u010dala rychle zeslabovat, jak se na novu slu\u0161\u00ed. Ov\u0161em v&nbsp;b\u0159eznu za\u010dala hv\u011bzda op\u011bt zjas\u0148ovat, p\u0159edev\u0161\u00edm v&nbsp;infra\u010derven\u00e9m oboru, dal\u0161\u00ed zjasn\u011bn\u00ed v&nbsp;dlouhovlnn\u00e9 oblasti nastalo o&nbsp;m\u011bs\u00edc pozd\u011bji. Sv\u011bteln\u00e1 k\u0159ivka tak neodpov\u00eddala \u017e\u00e1dn\u00e9 dosud zn\u00e1m\u00e9 hv\u011bzd\u011b. Mechanismus masivn\u00ed exploze tak <strong>z\u016fst\u00e1v\u00e1 nevysv\u011btlen<\/strong>, hypot\u00e9zy v\u0161ak preferuj\u00ed sr\u00e1\u017eku dvou hv\u011bzd, co\u017e by tuto hv\u011bzdu \u0159adilo do vz\u00e1cn\u00e9 skupiny \u010derven\u00fdch sv\u00edtiv\u00fdch nov. Exploze vyvrhla do okol\u00ed velk\u00e9 mno\u017estv\u00ed molekul\u00e1rn\u00edho prachu.<\/p>\n\n\n\n<p>Pokra\u010dov\u00e1n\u00ed <a href=\"https:\/\/www.asu.cas.cz\/articles\/2059\/19\/na-cem-pracujeme-v838-pomalu-se-probouzejici-kraska\" target=\"_blank\" rel=\"noreferrer noopener\">na webu Astronomick\u00e9ho \u00fastavu<\/a>.<\/p>\n\n\n\n<p>Odkazy a kontakty:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.asu.cas.cz\/articles\/2059\/19\/na-cem-pracujeme-v838-pomalu-se-probouzejici-kraska\" target=\"_blank\" rel=\"noreferrer noopener\">Na \u010dem pracujeme: V838: pomalu se probouzej\u00edc\u00ed kr\u00e1ska<\/a>; M. \u0160vanda<\/li>\n\n\n\n<li>T. Liimets a&nbsp;kol., <em>V838 Mon: A&nbsp;slow waking up of Sleeping Beauty?<\/em>, Astronomy &amp; Astrophysics, <a rel=\"noreferrer noopener\" href=\"https:\/\/ui.adsabs.harvard.edu\/abs\/2023A%26A...670A..13L\/abstract\" target=\"_blank\">670 (2023) A13<\/a>, preprint <a rel=\"noreferrer noopener\" href=\"https:\/\/arxiv.org\/abs\/2211.06629\" target=\"_blank\">arXiv:2211.06629<\/a><\/li>\n\n\n\n<li>Kontakt: Tiina Liimets, Ph.D., tiina.liimets@asu.cas.cz<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Hv\u011bzda V838 Monocerotis je jednou z&nbsp;nejzn\u00e1m\u011bj\u0161\u00edch hv\u011bzd v\u016fbec i&nbsp;mezi laiky, i&nbsp;kdy\u017e si toto ozna\u010den\u00ed mo\u017en\u00e1 ani neuv\u011bdomuj\u00ed. Sn\u00edmky sv\u011bteln\u00e9ho echa po jej\u00edm v\u00fdbuchu, kter\u00fd se<\/p>\n","protected":false},"author":1,"featured_media":2608,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37,32],"tags":[],"class_list":["post-2606","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-horke-hvezdy","category-novinky"],"_links":{"self":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/2606","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/comments?post=2606"}],"version-history":[{"count":4,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/2606\/revisions"}],"predecessor-version":[{"id":2643,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/2606\/revisions\/2643"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media\/2608"}],"wp:attachment":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media?parent=2606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/categories?post=2606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/tags?post=2606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}