{"id":2465,"date":"2022-12-16T09:29:03","date_gmt":"2022-12-16T08:29:03","guid":{"rendered":"https:\/\/stel.asu.cas.cz\/cs\/?p=2465"},"modified":"2022-12-16T09:41:35","modified_gmt":"2022-12-16T08:41:35","slug":"periodicky-promenne-hvezdy-strednich-hmotnosti-dlouhodobe-pozorovane-druzici-tess","status":"publish","type":"post","link":"https:\/\/stel.asu.cas.cz\/cs\/2022\/12\/16\/periodicky-promenne-hvezdy-strednich-hmotnosti-dlouhodobe-pozorovane-druzici-tess\/","title":{"rendered":"Periodicky prom\u011bnn\u00e9 hv\u011bzdy st\u0159edn\u00edch hmotnost\u00ed dlouhodob\u011b pozorovan\u00e9 dru\u017eic\u00ed TESS"},"content":{"rendered":"\n<p>Dlouhodob\u011b pracuj\u00edc\u00ed fotometrick\u00e9 dru\u017eicov\u00e9 experimenty, jako byly dru\u017eice CoRoT, Kepler, nyn\u00ed TESS a budouc\u00ed PLATO, poskytuj\u00ed velmi bohat\u00fd materi\u00e1l pro studium prom\u011bnnosti nejr\u016fzn\u011bj\u0161\u00edch typ\u016f hv\u011bzd. Marek Skarka ze Stel\u00e1rn\u00edho odd\u011blen\u00ed ASU se spole\u010dn\u011b s kolegy z \u010desk\u00fdch i zahrani\u010dn\u00edch instituc\u00ed v\u011bnoval fotometrick\u00e9 klasifikaci hv\u011bzd st\u0159edn\u00edch hmotnost\u00ed spektr\u00e1ln\u00edch typ\u016f A a\u017e F.<\/p>\n\n\n\n<p>Studovali prom\u011bnnost hv\u011bzd spektr\u00e1ln\u00edch typ\u016f A-F nal\u00e9zaj\u00edc\u00edch se v oblasti oblohy, kter\u00e1 je dlouhodob\u011b pokryta pozorov\u00e1n\u00edmi dru\u017eice TESS. TESS (Transiting Exoplanet Survey Satellite) je mis\u00ed NASA vypu\u0161t\u011bnou v roce 2018, jej\u00edm\u017e c\u00edlem je, jak jinak, p\u0159edev\u0161\u00edm hled\u00e1n\u00ed extrasol\u00e1rn\u00edch planet. Dru\u017eice skenuje oblohu v tzv. sektorech, kter\u00fd je pod kontinu\u00e1ln\u00edm dohledem v\u017edy 27 dn\u00ed. Pot\u00e9 pozorov\u00e1n\u00ed p\u0159ech\u00e1z\u00ed do dal\u0161\u00edho sektoru atd., a\u017e je cca po roce dokon\u010den tzv. cyklus a pozorov\u00e1n\u00ed sektor\u016f se opakuj\u00ed. D\u00edky t\u00e9to strategii jsou ov\u0161em oblasti ekliptik\u00e1ln\u00edch p\u00f3l\u016f \u201epod dohledem\u201c neust\u00e1le. M. Skarka se sv\u00fdmi kolegy se soust\u0159edil pr\u00e1v\u011b na tuto oblast.<\/p>\n\n\n\n<p class=\"has-small-font-size\"><strong>Popis k obr\u00e1zku<\/strong>: Hertzsprung\u016fv-Russel\u016fv diagram pulsuj\u00edc\u00edch hv\u011bzd (vlevo) a rota\u010dn\u011b modulovan\u00fdch prom\u011bnn\u00fdch (vpravo) ze studie Marka Skarky a kolektivu. R\u016fzn\u00fdmi barvami jsou ozna\u010deny r\u016fzn\u00e9 typy klasifikovan\u00e9 ve studii. \u010c\u00e1rkovan\u00e1 \u010d\u00e1ra ozna\u010duje pozici hlavn\u00ed posloupnosti nulov\u00e9ho v\u011bku, \u010derchovan\u00fdmi liniemi jsou pak nazna\u010deny v\u00fdvojov\u00e9 stopy hv\u011bzd vybran\u00fdch hmotnost\u00ed. \u010cerven\u00e9 a modr\u00e9 \u010d\u00e1ry sv\u00edraj\u00ed p\u00e1s pulsa\u010dn\u00ed nestability, \u0161ed\u00fd sektor pak oblast nestability typu \u03b3 Doradus. Je docela dob\u0159e patrn\u00e9, \u017ee pulsa\u010dn\u00ed prom\u011bnn\u00e9 skute\u010dn\u011b p\u0159eva\u017euj\u00ed v p\u00e1su nestability zat\u00edmco rota\u010dn\u011b modulovan\u00e9 hv\u011bzdy jsou typick\u00e9 sp\u00ed\u0161e pro chladn\u011bj\u0161\u00ed spektr\u00e1ln\u00ed typy, u nich\u017e se o\u010dek\u00e1v\u00e1 v\u00fdskyt konvekc\u00ed generovan\u00fdch magnetick\u00fdch pol\u00ed a skvrn slune\u010dn\u00edho typu.<\/p>\n\n\n\n<p><a rel=\"noreferrer noopener\" href=\"https:\/\/www.asu.cas.cz\/articles\/2037\/19\/na-cem-pracujeme-periodicky-promenne-hvezdy-strednich-hmotnosti-dlouhodobe-pozorovane-druzici-tess\" target=\"_blank\">Pokra\u010dov\u00e1n\u00ed<\/a><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>p\u0159evzato: <a rel=\"noreferrer noopener\" href=\"https:\/\/www.asu.cas.cz\/articles\/2037\/19\/na-cem-pracujeme-periodicky-promenne-hvezdy-strednich-hmotnosti-dlouhodobe-pozorovane-druzici-tess\" target=\"_blank\">Na \u010dem pracujeme: Periodicky prom\u011bnn\u00e9 hv\u011bzdy st\u0159edn\u00edch hmotnost\u00ed dlouhodob\u011b pozorovan\u00e9 dru\u017eic\u00ed TESS<\/a>, webov\u00e9 str\u00e1nky ASU (M. \u0160vanda)<\/li><li>citace: M. Skarka, J. \u017d\u00e1k a kol., Periodic variable A-F spectral type stars in the northern TESS continuous viewing zone, Astronomy &amp; Astrophysics v tisku, preprint <a href=\"https:\/\/arxiv.org\/abs\/2207.12922\" target=\"_blank\" rel=\"noreferrer noopener\">arXiv: 2207.12922<\/a><\/li><li>Kontakt: <a href=\"https:\/\/stel.asu.cas.cz\/cs\/vyzkum-extrasolarnich-planet\/lide\/#skarka\">Mgr. Marek Skarka<\/a>, Ph.D., marek.skarka@asu.cas.cz<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Dlouhodob\u011b pracuj\u00edc\u00ed fotometrick\u00e9 dru\u017eicov\u00e9 experimenty, jako byly dru\u017eice CoRoT, Kepler, nyn\u00ed TESS a budouc\u00ed PLATO, poskytuj\u00ed velmi bohat\u00fd materi\u00e1l pro studium prom\u011bnnosti nejr\u016fzn\u011bj\u0161\u00edch typ\u016f hv\u011bzd.<\/p>\n","protected":false},"author":1,"featured_media":2471,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37,32],"tags":[],"class_list":["post-2465","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\/2465","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=2465"}],"version-history":[{"count":3,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/2465\/revisions"}],"predecessor-version":[{"id":2474,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/posts\/2465\/revisions\/2474"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media\/2471"}],"wp:attachment":[{"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/media?parent=2465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/categories?post=2465"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stel.asu.cas.cz\/cs\/wp-json\/wp\/v2\/tags?post=2465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}