{"id":3410,"date":"2025-06-16T09:32:49","date_gmt":"2025-06-16T07:32:49","guid":{"rendered":"https:\/\/stel.asu.cas.cz\/cs\/?p=3410"},"modified":"2025-06-16T09:52:27","modified_gmt":"2025-06-16T07:52:27","slug":"50-draconis-zajimava-pulsujici-chemicky-pekuliarni-dvojhvezda","status":"publish","type":"post","link":"https:\/\/stel.asu.cas.cz\/cs\/2025\/06\/16\/50-draconis-zajimava-pulsujici-chemicky-pekuliarni-dvojhvezda\/","title":{"rendered":"50 Draconis &#8211; zaj\u00edmav\u00e1 pulsuj\u00edc\u00ed chemicky pekuli\u00e1rn\u00ed dvojhv\u011bzda"},"content":{"rendered":"\n<p>Ne v\u0161echny hv\u011bzdy se chovaj\u00ed p\u0159esn\u011b podle kolonky, do n\u00ed\u017e spadaj\u00ed. N\u011bkter\u00e9 z&nbsp;hv\u011bzd nap\u0159\u00edklad vykazuj\u00ed anom\u00e1lie v&nbsp;chemick\u00e9m slo\u017een\u00ed, takov\u00e9 ozna\u010dujeme jako chemicky pekuli\u00e1rn\u00ed. Marek Skarka ze Stel\u00e1rn\u00edho odd\u011blen\u00ed ASU vedl t\u00fdm, kter\u00fd studoval hned dvojici chemicky pekuli\u00e1rn\u00edch hv\u011bzd v&nbsp;syst\u00e9mu 50 Draconis. Pr\u00e1ce ukazuje, \u017ee jde o&nbsp;velmi zaj\u00edmav\u00fd syst\u00e9m, v&nbsp;n\u011bm\u017e se uplat\u0148uje hned n\u011bkolik neobvykl\u00fdch fyzik\u00e1ln\u00edch proces\u016f.&nbsp;<\/p>\n\n\n\n<p>Dvojhv\u011bzda 50 Draconis se nach\u00e1z\u00ed v&nbsp;souhv\u011bzd\u00ed Draka a&nbsp;z \u010cesk\u00e9 republiky je cirkumpol\u00e1rn\u00ed, tedy nezapad\u00e1 za obzor. Nach\u00e1z\u00ed se ve vzd\u00e1lenosti necel\u00fdch 100 parsek\u016f a&nbsp;proto\u017ee jde o&nbsp;pom\u011brn\u011b hmotnou hv\u011bzdu, jej\u00ed zd\u00e1nliv\u00e1 jasnost dovoluje jej\u00ed pozorov\u00e1n\u00ed i&nbsp;bez dalekohledu. Jako dvojhv\u011bzda byla odhalena ji\u017e na po\u010d\u00e1tku 20. stolet\u00ed, ob\u011b\u017en\u00e1 doba hlavn\u00edch slo\u017eek je jen o&nbsp;m\u00e1lo krat\u0161\u00ed ne\u017e p\u011bt dn\u00ed. Ji\u017e z&nbsp;prvn\u00edch spektroskopick\u00fdch pozorov\u00e1n\u00ed bylo jasn\u00e9, \u017ee jde o&nbsp;dvojici hv\u011bzd podobn\u00e9ho typu.<\/p>\n\n\n\n<p>Pokra\u010dov\u00e1n\u00ed: <a href=\"https:\/\/www.asu.cas.cz\/articles\/2420\/19\/na-cem-pracujeme-50-draconis-zajimava-pulsujici-chemicky-pekuliarni-dvojhvezda\" data-type=\"link\" data-id=\"https:\/\/www.asu.cas.cz\/articles\/2420\/19\/na-cem-pracujeme-50-draconis-zajimava-pulsujici-chemicky-pekuliarni-dvojhvezda\" target=\"_blank\" rel=\"noreferrer noopener\">web ASU<\/a><\/p>\n\n\n\n<p><strong>Popis obr\u00e1zku<\/strong>: Model syst\u00e9mu 50 Draconis. Deformace disk\u016f slapov\u00fdm p\u016fsoben\u00edm je v tomto m\u011b\u0159\u00edtku t\u00e9m\u011b\u0159 nepatrn\u00e1, zato je dob\u0159e viditeln\u00e9 rozlo\u017een\u00ed povrchov\u00fdch teplot na obou slo\u017ek\u00e1ch. (Kredit: Marek Skarka)<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Dal\u0161\u00ed informace<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>P\u0159evzato: <a href=\"https:\/\/www.asu.cas.cz\/articles\/2420\/19\/na-cem-pracujeme-50-draconis-zajimava-pulsujici-chemicky-pekuliarni-dvojhvezda\" data-type=\"link\" data-id=\"https:\/\/www.asu.cas.cz\/articles\/2420\/19\/na-cem-pracujeme-50-draconis-zajimava-pulsujici-chemicky-pekuliarni-dvojhvezda\" target=\"_blank\" rel=\"noreferrer noopener\">Na \u010dem pracujeme: 50 Draconis: zaj\u00edmav\u00e1 pulsuj\u00edc\u00ed chemicky pekuli\u00e1rn\u00ed dvojhv\u011bzda<\/a> (M. \u0160vanda, ASU)<\/li>\n\n\n\n<li>M. Skarka, J. Lipt\u00e1k a\u00a0kol., <em>50 Dra: Am-type twins with additional variability in a\u00a0non-eclipsing system<\/em>, Astronomy &amp; Astrophysics v\u00a0tisku, preprint <a href=\"https:\/\/arxiv.org\/abs\/2504.05854\" target=\"_blank\" rel=\"noreferrer noopener\">arXiv:2504.05854<\/a><\/li>\n\n\n\n<li>Kontakt:\u00a0Mgr. Marek Skarka, Ph.D., marek.skarka@asu.cas.cz<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ne v\u0161echny hv\u011bzdy se chovaj\u00ed p\u0159esn\u011b podle kolonky, do n\u00ed\u017e spadaj\u00ed. N\u011bkter\u00e9 z&nbsp;hv\u011bzd nap\u0159\u00edklad vykazuj\u00ed anom\u00e1lie v&nbsp;chemick\u00e9m slo\u017een\u00ed, takov\u00e9 ozna\u010dujeme jako chemicky pekuli\u00e1rn\u00ed. Marek Skarka<\/p>\n","protected":false},"author":1,"featured_media":3411,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38,32],"tags":[],"class_list":["post-3410","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-exoplanety","category-novinky"],"_links":{"self":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/3410","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=3410"}],"version-history":[{"count":1,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/3410\/revisions"}],"predecessor-version":[{"id":3412,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/3410\/revisions\/3412"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media\/3411"}],"wp:attachment":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media?parent=3410"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/categories?post=3410"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/tags?post=3410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}