{"id":673749,"date":"2026-01-28T07:56:03","date_gmt":"2026-01-28T07:56:03","guid":{"rendered":"https:\/\/microscopemedia.com\/?p=673749"},"modified":"2026-01-28T07:56:03","modified_gmt":"2026-01-28T07:56:03","slug":"cercetatorii-au-descoperit-o-noua-metoda-de-a-studia-moartea-stelelor","status":"publish","type":"post","link":"https:\/\/microscopemedia.com\/?p=673749","title":{"rendered":"Cercet\u0103torii au descoperit o nou\u0103 metod\u0103 de a studia \u201emoartea\u201d stelelor"},"content":{"rendered":"<div><img decoding=\"async\" src=\"https:\/\/microscopemedia.com\/wp-content\/uploads\/2026\/01\/cercetatorii-au-descoperit-o-noua-metoda-de-a-studia-moartea-stelelor.jpg\" class=\"ff-og-image-inserted\"><\/div>\n<p id=\"p-0\">Undele radio arat\u0103 c\u0103 steaua a eliminat violent cantit\u0103\u021bi uria\u0219e de materie cu pu\u021bin timp \u00eenainte de a exploda, cel mai probabil ca urmare a interac\u021biunii cu o stea companion din apropiere, potrivit ScienceDaily.<\/p>\n<p id=\"p-1\">Descoperirea le ofer\u0103 oamenilor de \u0219tiin\u021b\u0103 un nou instrument pentru a \u201ederula\u201d evenimentele care duc la moartea stelelor. Totodat\u0103, ea arat\u0103 c\u0103 unele supernove sunt mult mai dramatice \u00een ultimele lor momente dec\u00e2t se credea anterior.<\/p>\n<p id=\"p-2\">Astronomii au detectat, pentru prima dat\u0103, unde radio provenite de la un tip extrem de rar de stea aflat\u0103 \u00een explozie. Aceast\u0103 realizare le ofer\u0103 cercet\u0103torilor o modalitate unic\u0103 de a analiza ultimii ani din via\u021ba unei stele masive, \u00eenainte ca aceasta s\u0103 se \u00eencheie \u00eentr-o supernov\u0103 violent\u0103.<\/p>\n<p id=\"p-3\">Rezultatele, publicate \u00een The Astrophysical Journal Letters, se concentreaz\u0103 asupra unei supernove de tip Ibn. Acest tip de explozie are loc atunci c\u00e2nd o stea masiv\u0103 se autodistruge dup\u0103 ce a eliberat cantit\u0103\u021bi mari de materie bogat\u0103 \u00een heliu, cu pu\u021bin timp \u00eenainte de moarte.<\/p>\n<p id=\"p-4\">Echipa de cercetare a folosit radiotelescopul Very Large Array al National Science Foundation, din New Mexico, pentru a urm\u0103ri emisiile radio slabe provenite de la supernov\u0103 timp de aproximativ 18 luni. Aceste semnale radio au oferit dovezi clare despre gazul expulzat de stea cu doar c\u00e2\u021biva ani \u00eenainte de explozie \u2013 informa\u021bii care nu pot fi ob\u021binute doar cu ajutorul telescoapelor optice.<\/p>\n<p id=\"p-5\">Raphael Baer-Way, doctorand \u00een anul al treilea la Universitatea din Virginia \u0219i autor principal al studiului, a declarat: \u201eAm reu\u0219it s\u0103 folosim observa\u021biile radio pentru a \u00abvedea\u00bb ultimul deceniu din via\u021ba stelei \u00eenainte de explozie. Este ca o ma\u0219in\u0103 a timpului c\u0103tre acei ani finali cruciali, \u00een special ultimii cinci, c\u00e2nd steaua pierdea mas\u0103 \u00eentr-un ritm intens\u201d.<\/p>\n<h2 id=\"chapter-0\">Cum dezv\u0103luie gazul expulzat activitatea ascuns\u0103 a stelei<\/h2>\n<p id=\"p-6\">Baer-Way a explicat c\u0103 stelele din galaxiile \u00eendep\u0103rtate sunt, de regul\u0103, prea slabe pentru a fi studiate \u00een detaliu \u00eenainte de a exploda. \u00cens\u0103 atunci c\u00e2nd o stea elibereaz\u0103 din timp cantit\u0103\u021bi mari de materie, gazul din jurul ei poate ac\u021biona ca o \u201eoglind\u0103\u201d. C\u00e2nd unda de \u0219oc a supernovei love\u0219te acest material, se produc unde radio puternice, care dezv\u0103luie ce se \u00eent\u00e2mpla \u00een etapele finale ale evolu\u021biei stelei.<\/p>\n<p id=\"p-7\">Observa\u021biile sugereaz\u0103 c\u0103 steaua f\u0103cea, cel mai probabil, parte dintr-un sistem binar \u2013 dou\u0103 stele care orbiteaz\u0103 una \u00een jurul celeilalte \u2013 iar interac\u021biunea cu steaua companion a jucat un rol esen\u021bial \u00een pierderea extrem\u0103 de mas\u0103 observat\u0103 chiar \u00eenainte de explozie.<\/p>\n<p id=\"p-8\">\u201ePentru a pierde o asemenea cantitate de mas\u0103 \u00eentr-un interval de doar c\u00e2\u021biva ani\u2026 este aproape sigur nevoie de dou\u0103 stele legate gravita\u021bional una de cealalt\u0103\u201d, a explicat el.<\/p>\n<h2 id=\"chapter-1\">O nou\u0103 metod\u0103 de a studia moartea stelelor<\/h2>\n<p id=\"p-9\">M\u0103sur\u0103torile radio nu doar confirm\u0103 faptul c\u0103 pierderi intense de mas\u0103 pot avea loc cu pu\u021bin timp \u00eenainte de o supernov\u0103, ci introduc \u0219i o abordare nou\u0103 \u0219i puternic\u0103 pentru studierea mor\u021bii stelelor din \u00eentreg Universul. P\u00e2n\u0103 acum, oamenii de \u0219tiin\u021b\u0103 s-au bazat \u00een principal pe observa\u021biile \u00een lumin\u0103 vizibil\u0103. Observa\u021biile radio ofer\u0103 acum o metod\u0103 complementar\u0103, capabil\u0103 s\u0103 scoat\u0103 la iveal\u0103 detalii care anterior r\u0103m\u00e2neau ascunse.<\/p>\n<p id=\"p-10\">Baer-Way a precizat c\u0103 urm\u0103toarea etap\u0103 a cercet\u0103rii va presupune analizarea unui num\u0103r mai mare de supernove, pentru a stabili c\u00e2t de frecvente sunt aceste episoade dramatice de pierdere de mas\u0103 \u0219i ce pot ele spune despre evolu\u021bia stelelor.<\/p>\n<p id=\"p-11\">\u201eLucrarea lui Raphael a deschis o nou\u0103 fereastr\u0103 c\u0103tre Univers pentru studierea acestor supernove rare, dar esen\u021biale, ar\u0103t\u00e2nd c\u0103 trebuie s\u0103 \u00eendrept\u0103m radiotelescoapele mult mai devreme dec\u00e2t se credea p\u00e2n\u0103 acum, pentru a surprinde semnalele radio efemere\u201d, a declarat Maryam Modjaz, profesor de astronomie la Universitatea din Virginia \u0219i expert \u00een moartea stelelor masive \u0219i supernove.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Undele radio arat\u0103 c\u0103 steaua a eliminat violent cantit\u0103\u021bi uria\u0219e de materie cu pu\u021bin timp \u00eenainte de a exploda, cel mai probabil ca urmare a interac\u021biunii cu o stea companion &hellip; <a href=\"https:\/\/microscopemedia.com\/?p=673749\" class=\"more-link\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":673750,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"Default","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/673749"}],"collection":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=673749"}],"version-history":[{"count":0,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/posts\/673749\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=\/wp\/v2\/media\/673750"}],"wp:attachment":[{"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=673749"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=673749"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/microscopemedia.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=673749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}