\nInterferometrul astronomic din de\u015fertul Atacama (Atacama Large Millimeter\/ Submillimeter Array – ALMA, o re\u0163ea de radiotelescoape, n.r), din nordul statului Chile, a descoperit o stea din constela\u0163ia Scorpionului care are masa de 15 ori mai mare dec\u00e2t cea a Soarelui.<\/p>\n
\nO stea se formeaz\u0103 dintr-un nor de gaz care sufer\u0103 un colaps gravita\u0163ional (c\u0103derea spre interior, n.r.). Steaua care se na\u015fte atrage \u015fi mai mult praf \u015fi gaz din jur, datorit\u0103 gravita\u0163iei, cre\u00e2nd gradual un disc de agregare \u00een jurul s\u0103u, care se \u00eenv\u00e2rte \u015fi din care se pot forma planete. O parte a materiei este ejectat\u0103 de stea sub forma unor jeturi de gaz supersonice.<\/p>\n
\n\u00cen ceea ce prive\u015fte stelele masive, acestea emit radia\u0163ie ultraviolet\u0103 \u00een timpul procesului de formare, iar mul\u0163i astronomi au crezut p\u00e2n\u0103 de cur\u00e2nd c\u0103 aceast\u0103 radia\u0163ie distruge discul \u015fi jeturile de materie emise, \u00eempiedic\u00e2nd formarea stelei.<\/p>\n
\nTotu\u015fi, interferometrul de la ALMA a ar\u0103tat c\u0103 aceast\u0103 radia\u0163ie nu afecteaz\u0103 gazele \u015fi praful, marc\u00e2nd o premier\u0103 \u00een ceea ce prive\u015fte o astfel de observa\u0163ie.<\/strong><\/p>\n \n“Mul\u0163i astrofizicieni care studiaz\u0103 formarea stelelor au crezut c\u0103 aceste discuri \u015fi jeturi de gaz nu ar putea supravie\u0163ui \u00een momentul \u00een care stelele \u00eencep s\u0103 emit\u0103 radia\u0163ii ultraviolete \u015fi c\u0103 s-ar dispersa rapid. Noi am aflat acum nu numai c\u0103 acestea exist\u0103 \u015fi supravie\u0163uiesc, dar steaua continu\u0103 s\u0103 acumuleze mas\u0103 din discul de agregare”, a declarat astronomul Andres Guzman Fernandez, de la Universitatea din Chile.<\/p>\n \nAstrofizicienii se a\u015fteapt\u0103 ca telescopul ALMA, situat \u00een regiunea uscat\u0103 \u015fi cu atmosfera foarte rarefiat\u0103 a de\u015fertului chilian, s\u0103 fac\u0103 \u015fi mai multe descoperiri. La \u00eenceputul lunii noiembrie, astronomii care lucreaz\u0103 cu radiotelescopul din Atacama au publicat unele dintre cele mai detaliate imagini ob\u0163inute vreodat\u0103 ale form\u0103rii unor planete \u00een jurul unei stele tinere.<\/p>\n","protected":false},"excerpt":{"rendered":" Teoriile privind formarea stelelor masive ar putea fi revizuite dup\u0103 ce astronomii din Chile au ob\u0163inut dovezi c\u0103 gazul \u015fi praful din jurul unei stele tinere ar putea supravie\u0163ui bombardamentului cu radia\u0163ii emise de astru.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[510],"tags":[38752,6911,7853],"class_list":["post-114469","post","type-post","status-publish","format-standard","hentry","category-actualitate","tag-radiotelescop","tag-stele","tag-studiu"],"_links":{"self":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/114469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=114469"}],"version-history":[{"count":0,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=\/wp\/v2\/posts\/114469\/revisions"}],"wp:attachment":[{"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=114469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=114469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bm.dev.synology.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=114469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}