{"id":3793,"date":"2026-07-17T11:04:46","date_gmt":"2026-07-17T09:04:46","guid":{"rendered":"https:\/\/stel.asu.cas.cz\/cs\/?p=3793"},"modified":"2026-07-17T11:04:48","modified_gmt":"2026-07-17T09:04:48","slug":"hnedi-trpaslici-a-horke-jupitery-na-spolecne-ceste-ke-hvezdam","status":"publish","type":"post","link":"https:\/\/stel.asu.cas.cz\/cs\/2026\/07\/17\/hnedi-trpaslici-a-horke-jupitery-na-spolecne-ceste-ke-hvezdam\/","title":{"rendered":"Hn\u011bd\u00ed trpasl\u00edci a\u00a0hork\u00e9 Jupitery na spole\u010dn\u00e9 cest\u011b ke hv\u011bzd\u00e1m"},"content":{"rendered":"\n<p>Objekty na hranici mezi planetami a hv\u011bzdami p\u0159in\u00e1\u0161ej\u00ed nov\u00fd pohled na to, jak se masivn\u00ed t\u011blesa mohou dostat na velmi kr\u00e1tk\u00e9 ob\u011b\u017en\u00e9 dr\u00e1hy. Ve studii veden\u00e9 \u010desk\u00fdm v\u011bdcem z Astronomick\u00e9ho \u00fastavu AV \u010cR, ve spolupr\u00e1ci s Harvard &amp; Smithsonian Center for Astrophysics a chilskou Universidad Adolfo Ib\u00e1\u00f1ez, astronomov\u00e9 ukazuj\u00ed, \u017ee kr\u00e1tkoperiodi\u010dt\u00ed hn\u011bd\u00ed trpasl\u00edci a hork\u00e9 Jupitery sice pravd\u011bpodobn\u011b nevznikaj\u00ed stejn\u00fdm zp\u016fsobem, ale mohou sd\u00edlet podobnou migra\u010dn\u00ed cestu v mlad\u00fdch protoplanet\u00e1rn\u00edch disc\u00edch.<\/p>\n\n\n\n<p class=\"has-text-align-right\"><em>Tiskov\u00e1 zpr\u00e1va z 10. \u010dervence 2026<\/em><\/p>\n\n\n\n<p><strong>\u010cty\u0159i nov\u00e9 objekty mezi planetami a hv\u011bzdami<\/strong><\/p>\n\n\n\n<p>Hn\u011bd\u00ed trpasl\u00edci jsou plynn\u00e9 objekty hmotn\u011bj\u0161\u00ed ne\u017e planety, ale p\u0159\u00edli\u0161 m\u00e1lo hmotn\u00e9 na to, aby v&nbsp;jejich nitru dlouhodob\u011b prob\u00edhalo spalov\u00e1n\u00ed vod\u00edku jako ve hv\u011bzd\u00e1ch. P\u0159edstavuj\u00ed tak p\u0159irozen\u00fd p\u0159echod mezi planetami a hv\u011bzdami. Astronomov\u00e9 je v\u0161ak kolem b\u011b\u017en\u00fdch hv\u011bzd nach\u00e1zej\u00ed p\u0159ekvapiv\u011b m\u00e1lo. Tento nedostatek se ozna\u010duje jako \u201epou\u0161\u0165 hn\u011bd\u00fdch trpasl\u00edk\u016f\u201c a&nbsp;obvykle se vztahuje na hn\u011bd\u00e9 trpasl\u00edky s ob\u011b\u017en\u00fdmi periodami krat\u0161\u00edmi ne\u017e p\u0159ibli\u017en\u011b p\u011bt let.<\/p>\n\n\n\n<p>Mezin\u00e1rodn\u00ed t\u00fdm astronom\u016f nyn\u00ed pomoc\u00ed dat z vesm\u00edrn\u00e9 mise TESS a n\u00e1sledn\u00fdch m\u011b\u0159en\u00ed radi\u00e1ln\u00edch rychlost\u00ed ze spektrograf\u016f FEROS a PLATOSpec potvrdil \u010dty\u0159i nov\u00e9 tranzituj\u00edc\u00ed hn\u011bd\u00e9 trpasl\u00edky. Tranzituj\u00edc\u00ed znamen\u00e1, \u017ee p\u0159i pohledu ze Zem\u011b pravideln\u011b p\u0159ech\u00e1zej\u00ed p\u0159ed svou hv\u011bzdou a zp\u016fsobuj\u00ed jej\u00ed nepatrn\u00e9 zeslaben\u00ed.<\/p>\n\n\n\n<p>\u201e<em>Tranzituj\u00edc\u00ed hn\u011bd\u00ed trpasl\u00edci jsou pro n\u00e1s mimo\u0159\u00e1dn\u011b&nbsp;d\u016fle\u017eit\u00ed, proto\u017ee&nbsp;u&nbsp;nich dok\u00e1\u017eeme ur\u010dit nejen hmotnost, ale tak\u00e9 polom\u011br a dal\u0161\u00ed vlastnosti jejich ob\u011b\u017en\u00e9 dr\u00e1hy. D\u00edky tomu z\u00edsk\u00e1v\u00e1me mnohem \u00fapln\u011bj\u0161\u00ed obraz o t\u011bchto syst\u00e9mech a m\u016f\u017eeme je porovn\u00e1vat jak s ob\u0159\u00edmi planetami, tak s n\u00edzkohmotn\u00fdmi hv\u011bzdami,\u201c<\/em> vysv\u011btluje Dr. J\u00e1n \u0160ubjak z Astronomick\u00e9ho \u00fastavu Akademie v\u011bd \u010cesk\u00e9 republiky, hlavn\u00ed autor studie publikovan\u00e9 ve v\u011bdeck\u00e9m \u010dasopise Astronomy &amp; Astrophysics.<\/p>\n\n\n\n<p>Pokra\u010dov\u00e1n\u00ed: <a href=\"https:\/\/www.asu.cas.cz\/articles\/2589\/19\/hnedi-trpaslici-a-horke-jupitery-na-spolecne-ceste-ke-hvezdam\" data-type=\"link\" data-id=\"https:\/\/www.asu.cas.cz\/articles\/2589\/19\/hnedi-trpaslici-a-horke-jupitery-na-spolecne-ceste-ke-hvezdam\" target=\"_blank\" rel=\"noreferrer noopener\">Tiskov\u00e1 zpr\u00e1va z 10. \u010dervence 2026<\/a><\/p>\n\n\n\n<p><em><strong>Obr\u00e1zek v \u00favodu<\/strong>: Srovn\u00e1n\u00ed dvou populac\u00ed hn\u011bd\u00fdch trpasl\u00edk\u016f: kr\u00e1tkoperiodick\u00e9 objekty ob\u00edhaj\u00ed velmi bl\u00edzko sv\u00fdch hv\u011bzd, zat\u00edmco dlouhoperiodick\u00e9 syst\u00e9my se nach\u00e1zej\u00ed na mnohem vzd\u00e1len\u011bj\u0161\u00edch drah\u00e1ch. AI vizualizace,\u00a0ChatGPT\u00a0\/ OpenAI, 2026.<\/em><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Dal\u0161\u00ed informace a kontakty<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>V\u011bdeck\u00e1 publikace: <a href=\"https:\/\/www.aanda.org\/articles\/aa\/full_html\/2026\/05\/aa58244-25\/aa58244-25.html\" data-type=\"link\" data-id=\"https:\/\/www.aanda.org\/articles\/aa\/full_html\/2026\/05\/aa58244-25\/aa58244-25.html\" target=\"_blank\" rel=\"noreferrer noopener\">Unraveling the brown dwarf desert: Four new discoveries and a unifying period-coded picture<\/a>, \u0160ubjak J. a kol., A&amp;A, 709, A130 (2026)<\/li>\n\n\n\n<li>Mgr. J\u00e1n \u0160ubjak, Ph.D., Astronomick\u00fd \u00fastav AV\u00a0\u010cR, E-mail: jan.subjak@asu.cas.cz<\/li>\n\n\n\n<li>Pavel Suchan, tiskov\u00fd tajemn\u00edk Astronomick\u00e9ho \u00fastavu AV\u00a0\u010cR, Tel: 737\u00a0322\u00a0815, E-mail: pavel.suchan@asu.cas.cz<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Objekty na hranici mezi planetami a hv\u011bzdami p\u0159in\u00e1\u0161ej\u00ed nov\u00fd pohled na to, jak se masivn\u00ed t\u011blesa mohou dostat na velmi kr\u00e1tk\u00e9 ob\u011b\u017en\u00e9 dr\u00e1hy. Ve studii<\/p>\n","protected":false},"author":1,"featured_media":3795,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38,32,45],"tags":[],"class_list":["post-3793","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-exoplanety","category-novinky","category-platospec"],"_links":{"self":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/3793","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=3793"}],"version-history":[{"count":3,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/3793\/revisions"}],"predecessor-version":[{"id":3798,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/3793\/revisions\/3798"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media\/3795"}],"wp:attachment":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media?parent=3793"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/categories?post=3793"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/tags?post=3793"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}