{"id":3382,"date":"2025-04-20T12:35:51","date_gmt":"2025-04-20T10:35:51","guid":{"rendered":"https:\/\/stel.asu.cas.cz\/cs\/?p=3382"},"modified":"2025-04-30T12:40:25","modified_gmt":"2025-04-30T10:40:25","slug":"pozdni-veleobr-v-interagujici-dvojhvezde-obklopeny-akrecnim-diskem","status":"publish","type":"post","link":"https:\/\/stel.asu.cas.cz\/cs\/2025\/04\/20\/pozdni-veleobr-v-interagujici-dvojhvezde-obklopeny-akrecnim-diskem\/","title":{"rendered":"Pozdn\u00ed veleobr v\u00a0interaguj\u00edc\u00ed dvojhv\u011bzd\u011b obklopen\u00fd akre\u010dn\u00edm diskem"},"content":{"rendered":"\n<p>Modelov\u00e1n\u00ed pozdn\u00edch f\u00e1z\u00ed v\u00fdvoje velmi hmotn\u00fdch hv\u011bzd je jednou z&nbsp;nejv\u011bt\u0161\u00edch astrofyzik\u00e1ln\u00edch v\u00fdzev sou\u010dasnosti. Nav\u00edc jen omezen\u00e1 dostupnost re\u00e1ln\u00fdch pozorovac\u00edch dat \u010din\u00ed pokusy o&nbsp;modelov\u00e1n\u00ed je\u0161t\u011b slo\u017eit\u011bj\u0161\u00edmi, proto\u017ee je velmi obt\u00ed\u017en\u00e9 teoretick\u00e9 v\u00fdsledky ov\u011b\u0159it na skute\u010dn\u00fdch datech. I&nbsp;proto je velmi zaj\u00edmavou studie <strong>Michalise Kourniotise<\/strong> ze <strong>Stel\u00e1rn\u00edho odd\u011blen\u00ed ASU <\/strong>p\u0159ijat\u00e1 k&nbsp;publikaci v&nbsp;\u010dasopise Monthly Notices of the Royal Astronomical Society. Pr\u00e1ce se zab\u00fdvala opravdu zvl\u00e1\u0161tn\u00ed hv\u011bzdou s&nbsp;ozna\u010den\u00edm HD 144812.&nbsp;<\/p>\n\n\n\n<p>V\u00fdvoj hmotn\u00fdch hv\u011bzd prob\u00edh\u00e1 rychle, a&nbsp;to zejm\u00e9na v&nbsp;jejich pozdn\u00edch f\u00e1z\u00edch. To samo o&nbsp;sob\u011b velmi znesnad\u0148uje jejich pozorov\u00e1n\u00ed, nebo\u0165 pravd\u011bpodobnost zachycen\u00ed hv\u011bzdy v&nbsp;t\u00e9to zvl\u00e1\u0161tn\u00ed epizod\u011b je prost\u011b mal\u00e1. V&nbsp;t\u00e9to \u010d\u00e1sti Hertzsprungova-Russelova diagramu je nav\u00edc velmi snadn\u00e9 spl\u00e9st si hv\u011bzdu, kter\u00e1 pro\u0161la f\u00e1z\u00ed rud\u00e9ho veleobra, od sv\u00edtiv\u00fdch \u017elut\u00fdch nadobr\u016f nebo zakuklen\u00fdch modr\u00fdch sv\u00edtiv\u00fdch prom\u011bnn\u00fdch. V&nbsp;principu ke spr\u00e1vn\u00e9 identifikaci typu nesta\u010d\u00ed jen spektr\u00e1ln\u00ed pozorov\u00e1n\u00ed, ale je t\u0159eba nasb\u00edrat i&nbsp;dal\u0161\u00ed pozorovac\u00ed data, nap\u0159\u00edklad takov\u00e1, kter\u00e1 by mohla sv\u011bd\u010dit pro p\u0159\u00edtomnost podivn\u00fdch mod\u016f oscilac\u00ed nebo p\u0159\u00edtomnost prachov\u00e9 ob\u00e1lky v&nbsp;t\u011bsn\u00e9m okol\u00ed hv\u011bzdy. Hv\u011bzdy v&nbsp;t\u00e9to oblasti H-R diagramu jsou obecn\u011b pova\u017eov\u00e1ny za p\u0159edch\u016fdce v\u00fdbuch\u016f supernov, co\u017e je p\u0159\u00edmo p\u0159edur\u010duje k&nbsp;detailn\u00edmu studiu.<\/p>\n\n\n\n<p>Pokra\u010dov\u00e1n\u00ed: <a href=\"https:\/\/www.asu.cas.cz\/articles\/2401\/19\/na-cem-pracujeme-pozdni-veleobr-v-interagujici-dvojhvezde-obklopeny-akrecnim-diskem\" data-type=\"link\" data-id=\"https:\/\/www.asu.cas.cz\/articles\/2401\/19\/na-cem-pracujeme-pozdni-veleobr-v-interagujici-dvojhvezde-obklopeny-akrecnim-diskem\" target=\"_blank\" rel=\"noreferrer noopener\">web ASU<\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Popis obr\u00e1zku<\/h4>\n\n\n\n<p>Takto n\u011bjak m\u016f\u017ee vypadat \u017elut\u00fd veleobr v t\u011bsn\u00e9 dvojhv\u011bzd\u011b s modrou hv\u011bzdou na hlavn\u00ed posloupnosti. Dost mo\u017en\u00e1 pr\u00e1v\u011b takto vypad\u00e1 syst\u00e9m HD 144812 (druh\u00e1 slo\u017eka by byla je\u0161t\u011b nav\u00edc obklopena akre\u010dn\u00edm diskem). (Kredit: Kavli IPMU \/ Aya Tsuboi)<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Odkazy a dal\u0161\u00ed informace<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>P\u0159evzato z webu ASU: <a href=\"https:\/\/www.asu.cas.cz\/articles\/2401\/19\/na-cem-pracujeme-pozdni-veleobr-v-interagujici-dvojhvezde-obklopeny-akrecnim-diskem\" data-type=\"link\" data-id=\"https:\/\/www.asu.cas.cz\/articles\/2401\/19\/na-cem-pracujeme-pozdni-veleobr-v-interagujici-dvojhvezde-obklopeny-akrecnim-diskem\" target=\"_blank\" rel=\"noreferrer noopener\">Na \u010dem pracujeme: Pozdn\u00ed veleobr v\u00a0interaguj\u00edc\u00ed dvojhv\u011bzd\u011b obklopen\u00fd akre\u010dn\u00edm diskem<\/a> (M. \u0160vanda)<\/li>\n\n\n\n<li>M. Kourniotis, M. Kraus a kol., HD 144812: A transition-phase massive star in a binary system, MNRAS Letters v tisku, preprint <a href=\"https:\/\/arxiv.org\/abs\/2503.19961\" target=\"_blank\" rel=\"noreferrer noopener\">arXiv:2503.19961<\/a><\/li>\n\n\n\n<li>Kontakt: Dr. Michalis Kourniotis <a href=\"mailto:michail.kourniotis@asu.cas.cz\">michail.kourniotis@asu.cas.cz<\/a><\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Modelov\u00e1n\u00ed pozdn\u00edch f\u00e1z\u00ed v\u00fdvoje velmi hmotn\u00fdch hv\u011bzd je jednou z&nbsp;nejv\u011bt\u0161\u00edch astrofyzik\u00e1ln\u00edch v\u00fdzev sou\u010dasnosti. Nav\u00edc jen omezen\u00e1 dostupnost re\u00e1ln\u00fdch pozorovac\u00edch dat \u010din\u00ed pokusy o&nbsp;modelov\u00e1n\u00ed je\u0161t\u011b slo\u017eit\u011bj\u0161\u00edmi,<\/p>\n","protected":false},"author":1,"featured_media":3383,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37,32],"tags":[],"class_list":["post-3382","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\/3382","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=3382"}],"version-history":[{"count":3,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/3382\/revisions"}],"predecessor-version":[{"id":3388,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/3382\/revisions\/3388"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media\/3383"}],"wp:attachment":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media?parent=3382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/categories?post=3382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/tags?post=3382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}