Jedn\u00edm z\u00a0vedlej\u0161\u00edch objev\u016f dru\u017eicov\u00fdch hleda\u010d\u016f exoplanet bylo odhalen\u00ed velmi mohutn\u00fdch erupc\u00ed u\u00a0hv\u011bzd podobn\u00fdch Slunci. A\u00a0vlastn\u011b i\u00a0u hv\u011bzd mnohem teplej\u0161\u00edch ne\u017e je Slunce, u\u00a0nich\u017e se takov\u00e9 jevy neo\u010dek\u00e1valy. Olga Maryeva a Petr Nem\u00e9th ze Stel\u00e1rn\u00edho odd\u011blen\u00ed\u00a0ASU a kol. se v\u011bnovali monitoringu hv\u011bzdy HD 36030 s\u00a0c\u00edlem odhalit p\u016fvod u\u00a0n\u00ed pozorovan\u00fdch erupc\u00ed.<\/p>\n\n\n\n
Vysokokaden\u010dn\u00ed fotometrie prov\u00e1d\u011bn\u00e1 dru\u017eicov\u00fdmi hleda\u010di exoplanet, jako byla nap\u0159. dru\u017eice Kepler, v\u00a0sou\u010dasnosti je dru\u017eice TESS a\u00a0v bl\u00edzk\u00e9 budoucnosti bude PLATO, se uk\u00e1zala velmi efektivn\u00edm n\u00e1strojem pro objevov\u00e1n\u00ed n\u00e1hl\u00fdch kr\u00e1tce trvaj\u00edc\u00edch zjasn\u011bn\u00ed u\u00a0hv\u011bzd slune\u010dn\u00edho typu. Ne \u017ee by nikdo ne\u010dekal, \u017ee hv\u011bzdy podobn\u00e9 Slunci nebudou m\u00edt podobn\u00e9 erupce, jak\u00e9 registrujeme na Slunci ji\u017e po desetilet\u00ed. Av\u0161ak v\u00fdskyt z\u00e1blesk\u016f, kter\u00e9 o\u00a0mnoho \u0159\u00e1d\u016f p\u0159ed\u010dily ty nejsiln\u011bj\u0161\u00ed erupce na Slunci, byl velk\u00fdm p\u0159ekvapen\u00edm. V\u017eil se pro n\u011b term\u00edn \u201esupererupce\u201c. Dal\u0161\u00edm p\u0159ekvapen\u00edm pak bylo zji\u0161t\u011bn\u00ed, \u017ee tyto erupce je mo\u017en\u00e9 pozorovat nejen u\u00a0hv\u011bzd slune\u010dn\u00edho typu, ale tak\u00e9 u\u00a0hv\u011bzd v\u00fdrazn\u011b teplej\u0161\u00edch. A\u00a0zde nast\u00e1v\u00e1 probl\u00e9m: zat\u00edmco chladn\u00e9 hv\u011bzdy vlastn\u00ed mohutn\u00e9 podpovrchov\u00e9 konvektivn\u00ed z\u00f3ny, v\u00a0nich\u017e se turbulenc\u00ed generuj\u00ed siln\u00e1 lokalizovan\u00e1 magnetick\u00e1 pole, kter\u00e1 jsou s\u00a0erupcemi spojov\u00e1na, hork\u00e9 hv\u011bzdy takov\u00e9 konvektivn\u00ed z\u00f3ny nemaj\u00ed. Naopak, jejich podpovrchov\u00e9 vrstvy jsou a\u017e p\u0159ekvapiv\u011b stabiln\u00ed, tak\u017ee o\u00a0procesu dynama zde nem\u016f\u017ee b\u00fdt \u0159e\u010d. N\u011bkter\u00e9 modely sice p\u0159ipou\u0161t\u011bj\u00ed existenci tenk\u00fdch povrchov\u00fdch konvektivn\u00edch slupi\u010dek u\u00a0hv\u011bzd spektr\u00e1ln\u00edho typu A, i\u00a0tak byly zaznamen\u00e1ny erupce u\u00a0je\u0161t\u011b teplej\u0161\u00edch hv\u011bzd, u\u00a0spektr\u00e1ln\u00edch typ\u016f B. Zde u\u017e mo\u017en\u00fd mechanismus nen\u00ed jasn\u00fd v\u016fbec.<\/p>\n\n\n\n
P<\/a>o<\/a>k<\/a>r<\/a>a<\/a>\u010d<\/a>o<\/a>v<\/a>\u00e1<\/a>n<\/a>\u00ed<\/a> na webu ASU<\/a><\/p>\n\n\n\n Jedn\u00edm z\u00a0vedlej\u0161\u00edch objev\u016f dru\u017eicov\u00fdch hleda\u010d\u016f exoplanet bylo odhalen\u00ed velmi mohutn\u00fdch erupc\u00ed u\u00a0hv\u011bzd podobn\u00fdch Slunci. A\u00a0vlastn\u011b i\u00a0u hv\u011bzd mnohem teplej\u0161\u00edch ne\u017e je Slunce, u\u00a0nich\u017e se takov\u00e9<\/p>\n","protected":false},"author":1,"featured_media":2699,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37,32],"tags":[],"class_list":["post-2696","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\/2696","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=2696"}],"version-history":[{"count":3,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/2696\/revisions"}],"predecessor-version":[{"id":2701,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/2696\/revisions\/2701"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media\/2699"}],"wp:attachment":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media?parent=2696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/categories?post=2696"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/tags?post=2696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Dal\u0161\u00ed informace<\/h4>\n\n\n\n
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