{"id":11536,"date":"2020-02-27T13:38:10","date_gmt":"2020-02-27T13:38:10","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=11536"},"modified":"2020-02-27T13:38:10","modified_gmt":"2020-02-27T13:38:10","slug":"sun-long-lost-sibling-star-formation","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/astronomy\/sun-long-lost-sibling-star-formation\/","title":{"rendered":"Slunce a jeho d\u00e1vno ztracen\u00e9 dvoj\u010de: Nov\u00fd v\u00fdzkum o vzniku hv\u011bzd"},"content":{"rendered":"

Slunce a jeho d\u00e1vno ztracen\u00e9 dvoj\u010de: Nov\u00fd v\u00fdzkum o vzniku hv\u011bzd<\/h2>\n\n

Dvojhv\u011bzdy: B\u011b\u017en\u00fd jev<\/h2>\n\n

V rozs\u00e1hl\u00e9m prostoru na\u0161\u00ed galaxie, Ml\u00e9\u010dn\u00e9 dr\u00e1hy, jsou dvojhv\u011bzdy roz\u0161\u00ed\u0159en\u00fdm jevem. Tato nebesk\u00e1 dua, tvo\u0159en\u00e1 dv\u011bma hv\u011bzdami gravita\u010dn\u011b v\u00e1zan\u00fdmi k sob\u011b, p\u0159edstavuj\u00ed v\u00fdznamnou \u010d\u00e1st hv\u011bzdn\u00e9 populace.<\/p>\n\n

Z\u00e1hada Sluncova dvoj\u010dete<\/h2>\n\n

Po cel\u00e1 desetilet\u00ed v\u011bdci uva\u017eovali o mo\u017enosti, \u017ee na\u0161e nejbli\u017e\u0161\u00ed hv\u011bzda, Slunce, kdysi m\u011bla dvoj\u010de. Toto z\u00e1hadn\u00e9 dvoj\u010de, naz\u00fdvan\u00e9 \u201eNemesis\u201c, z\u016fst\u00e1v\u00e1 nepolapiteln\u00e9 a zanech\u00e1v\u00e1 astronomy s nezodpov\u011bzen\u00fdmi ot\u00e1zkami o p\u016fvodu na\u0161\u00ed slune\u010dn\u00ed soustavy.<\/p>\n\n

Nov\u00e9 poznatky ze studi\u00ed vzniku hv\u011bzd<\/h2>\n\n

Ned\u00e1vn\u00fd v\u00fdzkum proveden\u00fd astrofyziky Sarah Sadavoyovou a Stevenem Stahlerem vrhl nov\u00e9 sv\u011btlo na vznik a v\u00fdvoj hv\u011bzd. Jejich pe\u010dliv\u00e1 pozorov\u00e1n\u00ed a statistick\u00e9 modelov\u00e1n\u00ed poskytly p\u0159esv\u011bd\u010div\u00e9 d\u016fkazy o tom, \u017ee v\u011bt\u0161ina hv\u011bzd, v\u010detn\u011b na\u0161eho vlastn\u00edho Slunce, pravd\u011bpodobn\u011b vznik\u00e1 z bin\u00e1rn\u00edch syst\u00e9m\u016f.<\/p>\n\n

Vznik hv\u011bzd: P\u0159\u00edb\u011bh p\u00e1r\u016f<\/h2>\n\n

Studie t\u00fdmu, publikovan\u00e1 v presti\u017en\u00edm \u010dasopise Monthly Notices of the Royal Astronomy Society, analyzovala rozlo\u017een\u00ed a st\u00e1\u0159\u00ed hv\u011bzd v souhv\u011bzd\u00ed Persea, oblasti zn\u00e1m\u00e9 svou aktivn\u00ed tvorbou hv\u011bzd. Jejich zji\u0161t\u011bn\u00ed odhalila n\u00e1padn\u00fd vzorec: hv\u011bzdy odd\u011blen\u00e9 velk\u00fdmi vzd\u00e1lenostmi, p\u0159esahuj\u00edc\u00edmi 46 500 milion\u016f mil, vykazovaly v\u00fdrazn\u011b mlad\u0161\u00ed st\u00e1\u0159\u00ed ve srovn\u00e1n\u00ed s hv\u011bzdami nach\u00e1zej\u00edc\u00edmi se v t\u011bsn\u00e9 bl\u00edzkosti.<\/p>\n\n

Toto pozorov\u00e1n\u00ed nazna\u010duje, \u017ee hv\u011bzdy se p\u016fvodn\u011b tvo\u0159\u00ed v p\u00e1rech. V pr\u016fb\u011bhu \u010dasu mohou tyto bin\u00e1rn\u00ed syst\u00e9my proj\u00edt r\u016fzn\u00fdmi evolu\u010dn\u00edmi cestami. N\u011bkter\u00e1 dua z\u016fst\u00e1vaj\u00ed gravita\u010dn\u011b v\u00e1zan\u00e1 a tvo\u0159\u00ed kompaktn\u00ed syst\u00e9my, zat\u00edmco jin\u00e1 se od sebe vzdaluj\u00ed a st\u00e1vaj\u00ed se osam\u011bl\u00fdmi hv\u011bzdami.<\/p>\n\n

Implikace pro Slunce<\/h2>\n\n

Implikace tohoto v\u00fdzkumu jsou z\u00e1sadn\u00ed pro pochopen\u00ed historie na\u0161\u00ed slune\u010dn\u00ed soustavy. Zji\u0161t\u011bn\u00ed Sadavoyov\u00e9 a Stahlera siln\u011b podporuj\u00ed hypot\u00e9zu, \u017ee Slunce kdysi m\u011blo hv\u011bzdn\u00e9 dvoj\u010de, Nemesis. Toto d\u00e1vno ztracen\u00e9 dvoj\u010de se mohlo od Slunce odd\u011blit p\u0159ed miliony let a vydat se do rozs\u00e1hlosti Ml\u00e9\u010dn\u00e9 dr\u00e1hy.<\/p>\n\n

Hled\u00e1n\u00ed Nemesis<\/h2>\n\n

Navzdory l\u00e1kav\u00fdm d\u016fkaz\u016fm o existenci Nemesis z\u016fst\u00e1v\u00e1 jej\u00ed aktu\u00e1ln\u00ed poloha nezn\u00e1m\u00e1. Astronomov\u00e9 nad\u00e1le p\u00e1traj\u00ed po tomto nepolapiteln\u00e9m spole\u010dn\u00edkovi v nad\u011bji, \u017ee odhal\u00ed posledn\u00ed kapitolu nebesk\u00e9 rodinn\u00e9 historie Slunce.<\/p>\n\n

Vznik hv\u011bzd: Okno do minulosti vesm\u00edru<\/h2>\n\n

Krom\u011b konkr\u00e9tn\u00edch d\u016fsledk\u016f pro Slunce m\u00e1 v\u00fdzkum vzniku dvojhv\u011bzd \u0161ir\u0161\u00ed v\u00fdznam pro astrofyziku. Studiem proces\u016f, kter\u00e9 \u0159\u00edd\u00ed vznik hv\u011bzd, z\u00edsk\u00e1vaj\u00ed v\u011bdci cenn\u00e9 poznatky o p\u016fvodu a v\u00fdvoji na\u0161eho vesm\u00edru.<\/p>\n\n

Sadavoyov\u00e1 zd\u016fraz\u0148uje d\u016fle\u017eitost pochopen\u00ed vzniku hv\u011bzd pro objasn\u011bn\u00ed historie kosmu. \u201eTento v\u00fdzkum zm\u011bn\u00ed na\u0161e ch\u00e1p\u00e1n\u00ed hust\u00fdch hv\u011bzdn\u00fdch jader a hv\u011bzd v nich obsa\u017een\u00fdch,\u201c vysv\u011btluje.<\/p>\n\n

Z\u00e1v\u011br<\/h2>\n\n

Objev, \u017ee hv\u011bzdy pravd\u011bpodobn\u011b vznikaj\u00ed v p\u00e1rech, m\u00e1 z\u00e1sadn\u00ed d\u016fsledky pro na\u0161e ch\u00e1p\u00e1n\u00ed hv\u011bzdn\u00e9ho v\u00fdvoje a historie vesm\u00edru. Zat\u00edmco p\u00e1tr\u00e1n\u00ed po Nemesis pokra\u010duje, prob\u00edhaj\u00edc\u00ed studie vzniku hv\u011bzd slibuje odhalit dal\u0161\u00ed tajemstv\u00ed na\u0161eho nebesk\u00e9ho sousedstv\u00ed a rozs\u00e1hl\u00e9ho prostoru za n\u00edm.<\/p>","protected":false},"excerpt":{"rendered":"

Slunce a jeho d\u00e1vno ztracen\u00e9 dvoj\u010de: Nov\u00fd v\u00fdzkum o vzniku hv\u011bzd Dvojhv\u011bzdy: B\u011b\u017en\u00fd jev V rozs\u00e1hl\u00e9m prostoru na\u0161\u00ed galaxie, Ml\u00e9\u010dn\u00e9 dr\u00e1hy, jsou dvojhv\u011bzdy roz\u0161\u00ed\u0159en\u00fdm jevem. Tato nebesk\u00e1 dua, tvo\u0159en\u00e1 dv\u011bma…<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[437],"tags":[436,15606,697,15607,1173,15608],"class_list":["post-11536","post","type-post","status-publish","format-standard","hentry","category-astronomy","tag-astrophysics","tag-binary-stars","tag-cosmology","tag-nemesis","tag-solar-system","tag-star-formation"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/11536","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=11536"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/11536\/revisions"}],"predecessor-version":[{"id":11537,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/11536\/revisions\/11537"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=11536"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=11536"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=11536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}