{"id":2452,"date":"2022-12-07T08:53:30","date_gmt":"2022-12-07T07:53:30","guid":{"rendered":"https:\/\/stel.asu.cas.cz\/cs\/?p=2452"},"modified":"2022-12-07T08:53:57","modified_gmt":"2022-12-07T07:53:57","slug":"prvni-panchromaticka-studie-slapoveho-roztrhani-hvezdy-s-vytryskem","status":"publish","type":"post","link":"https:\/\/stel.asu.cas.cz\/cs\/2022\/12\/07\/prvni-panchromaticka-studie-slapoveho-roztrhani-hvezdy-s-vytryskem\/","title":{"rendered":"Prvn\u00ed panchromatick\u00e1 studie slapov\u00e9ho roztrh\u00e1n\u00ed hv\u011bzdy s v\u00fdtryskem"},"content":{"rendered":"\n<p>Christina Th\u00f6ne, astronomka z Astronomick\u00e9ho \u00fastavu Akademie v\u011bd \u010cR, byla \u010dlenkou t\u00fdmu, kter\u00fd poprv\u00e9 zajistil dlouhodob\u00e9 sledov\u00e1n\u00ed slapov\u00e9ho roztrh\u00e1n\u00ed hv\u011bzdy &#8211; extr\u00e9mn\u011b vz\u00e1cn\u00e9 ud\u00e1losti &#8211; pomoc\u00ed infra\u010derven\u00fdch a optick\u00fdch dalekohled\u016f. Jejich \u010dl\u00e1nek &#8222;A very luminous jet from disruption of a star by a massive black hole&#8220; byl publikov\u00e1n v \u010dasopise Nature 30. listopadu 2022.<\/p>\n\n\n\n<p>Ke <strong>slapov\u00e9mu roztrh\u00e1n\u00ed<\/strong> (Tidal Disruption Event, TDE) doch\u00e1z\u00ed, kdy\u017e se objekt, \u010dasto hv\u011bzda, p\u0159\u00edli\u0161 p\u0159ibl\u00ed\u017e\u00ed k \u010dern\u00e9 d\u00ed\u0159e a ta jej roztrh\u00e1 gravita\u010dn\u00edmi silami. Obvykle jde o supermasivn\u00ed \u010dernou d\u00edru, kter\u00e1 se nach\u00e1z\u00ed v centru t\u00e9m\u011b\u0159 ka\u017ed\u00e9 galaxie. Slapov\u00e9 s\u00edly \u010dern\u00e9 d\u00edry hv\u011bzdu roztrhaj\u00ed a vznikne z n\u00ed akre\u010dn\u00ed disk, kter\u00fd \u010dern\u00e1 d\u00edra postupn\u011b spot\u0159ebuje. V n\u011bkter\u00fdch, z\u0159ejm\u011b velmi vz\u00e1cn\u00fdch p\u0159\u00edpadech (m\u00e9n\u011b ne\u017e 1 %), toto slapov\u00e9 rozru\u0161en\u00ed dokonce vyvol\u00e1 <strong>vznik relativistick\u00e9ho v\u00fdtrysku<\/strong> (jetu) s materi\u00e1lem vyvr\u017een\u00fdm z \u010dern\u00e9 d\u00edry rychlost\u00ed velmi bl\u00edzkou rychlosti sv\u011btla. Materi\u00e1l pak v d\u016fsledku sr\u00e1\u017eek uvnit\u0159 v\u00fdtrysku a sr\u00e1\u017eek s okoln\u00edm prost\u0159ed\u00edm intenzivn\u011b z\u00e1\u0159\u00ed v rozsahu od r\u00e1diov\u00fdch vln p\u0159es sv\u011btlo po rentgenov\u00e9 z\u00e1\u0159en\u00ed.<\/p>\n\n\n\n<p>Doposud se tyto takzvan\u00e9 &#8222;v\u00fdtryskov\u00e9&#8220; TDE objevovaly pomoc\u00ed vysokoenergetick\u00fdch dru\u017eic ve vesm\u00edru. Naposledy se tak stalo p\u0159ed 10 lety v roce 2012. Objev \u00fakazu s ozna\u010den\u00edm AT2022cmc v \u00fanoru leto\u0161n\u00edho roku v\u0161ak prob\u011bhl jinak. Vedouc\u00ed autor \u010dl\u00e1nku Igor Andreoni vyvinul metodu vyhled\u00e1v\u00e1n\u00ed mo\u017en\u00fdch ud\u00e1lost\u00ed a v\u010dasn\u00e9ho varov\u00e1n\u00ed v r\u00e1mci rozs\u00e1hl\u00e9 pozemn\u00ed optick\u00e9 p\u0159ehl\u00eddky &#8222;Zwicky Transient Facility&#8220; (ZTF) um\u00edst\u011bn\u00e9 na ho\u0159e Palomar v Kalifornii.<\/p>\n\n\n\n<p>&#8230;<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>pokra\u010dov\u00e1n\u00ed a dal\u0161\u00ed podrobnosti naleznete v <a rel=\"noreferrer noopener\" href=\"https:\/\/www.asu.cas.cz\/articles\/2034\/19\/prvni-panchromaticka-studie-slapoveho-roztrhani-hvezdy-s-vytryskem\" target=\"_blank\">Tiskov\u00e9 zpr\u00e1v\u011b ASU<\/a><\/li><li>tiskov\u00e1 zpr\u00e1va <a rel=\"noreferrer noopener\" href=\"https:\/\/www.eso.org\/public\/czechrepublic\/news\/eso2216\/\" target=\"_blank\">Evropsk\u00e9 ji\u017en\u00ed observato\u0159e<\/a> (s odkazem na p\u016fvodn\u00ed pr\u00e1ci)<\/li><li>kontakt <strong>Dr. Martin Jel\u00ednek<\/strong> \u2013 Stel\u00e1rn\u00ed odd\u011blen\u00ed, vedouc\u00ed skupiny astrofyziky vysok\u00fdch energi\u00ed&nbsp;<a href=\"mailto:martin.jelinek@asu.cas.cz\">martin.jelinek@asu.cas.cz<\/a><\/li><\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Christina Th\u00f6ne, astronomka z Astronomick\u00e9ho \u00fastavu Akademie v\u011bd \u010cR, byla \u010dlenkou t\u00fdmu, kter\u00fd poprv\u00e9 zajistil dlouhodob\u00e9 sledov\u00e1n\u00ed slapov\u00e9ho roztrh\u00e1n\u00ed hv\u011bzdy &#8211; extr\u00e9mn\u011b vz\u00e1cn\u00e9 ud\u00e1losti &#8211;<\/p>\n","protected":false},"author":1,"featured_media":2454,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32,39],"tags":[],"class_list":["post-2452","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novinky","category-vysoke-energie"],"_links":{"self":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/2452","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=2452"}],"version-history":[{"count":3,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/2452\/revisions"}],"predecessor-version":[{"id":2457,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/2452\/revisions\/2457"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media\/2454"}],"wp:attachment":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media?parent=2452"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/categories?post=2452"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/tags?post=2452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}