{"id":36291,"date":"2019-08-26T03:20:44","date_gmt":"2019-08-26T00:20:44","guid":{"rendered":"https:\/\/bilimvegelecek.com.tr\/?p=36291"},"modified":"2019-08-25T22:12:35","modified_gmt":"2019-08-25T19:12:35","slug":"antarktika-karlarinda-kesfedilen-yildiz-tozu-gunes-sisteminin-gecmisine-isik-tutuyor","status":"publish","type":"post","link":"https:\/\/bilimvegelecek.com.tr\/index.php\/2019\/08\/26\/antarktika-karlarinda-kesfedilen-yildiz-tozu-gunes-sisteminin-gecmisine-isik-tutuyor","title":{"rendered":"Antarktika karlar\u0131nda ke\u015ffedilen y\u0131ld\u0131z tozu G\u00fcne\u015f Sistemi’nin ge\u00e7mi\u015fine \u0131\u015f\u0131k tutuyor"},"content":{"rendered":"

Antarktika\u2019da demir-60 izotopunun ke\u015ffi, G\u00fcne\u015f Sistemi\u2019nin \u00e7evresi hakk\u0131nda bilgi sa\u011fl\u0131yor.<\/p>\n

Nadir izotop demir-60, b\u00fcy\u00fck y\u0131ld\u0131z patlamalar\u0131nda yarat\u0131lm\u0131\u015ft\u0131r. Bu izotopun yaln\u0131zca \u00e7ok k\u00fc\u00e7\u00fck bir miktar\u0131 uzak y\u0131ld\u0131zlardan D\u00fcnya\u2019ya ula\u015f\u0131r. \u00dcyelerinin \u00f6nemli bir k\u0131sm\u0131n\u0131 M\u00fcnih Teknik \u00dcniversitesi\u2019nden (TUM)kat\u0131l\u0131mc\u0131lar\u0131n olu\u015fturdu\u011fu bir ara\u015ft\u0131rma ekibi, Antarktika kar\u0131nda demir-60\u2019\u0131 ke\u015ffetti. Biliminsanlar\u0131, demir izotopunun y\u0131ld\u0131zlararas\u0131 b\u00f6lgeden geldi\u011fini \u00f6ne s\u00fcr\u00fcyor.<\/p>\n

Her y\u0131l D\u00fcnya\u2019ya ula\u015fan kozmik toz miktar\u0131 birka\u00e7 bin ile on bin ton aras\u0131nda de\u011fi\u015fiyor. K\u00fc\u00e7\u00fck par\u00e7ac\u0131klar\u0131n \u00e7o\u011fu, G\u00fcne\u015f Sistemi\u2019mizdeki asteroitlerden veya kuyrukluy\u0131ld\u0131zlardan gelir.Ancak, k\u00fc\u00e7\u00fck bir y\u00fczdesi uzak y\u0131ld\u0131zlardan geliyor. Bunlar\u0131n i\u00e7erisinde bulunan demir-60 izotopunun do\u011fal karasal bir kayna\u011f\u0131 yoktur, sadece s\u00fcpernova patlamas\u0131 sonucu ya da kozmik radyasyonun kozmik tozla tepkimesi sonucu ortaya \u00e7\u0131karlar.<\/p>\n

Antarktika karlar\u0131 D\u00fcnya’y\u0131 dola\u015f\u0131yor<\/strong>
\nD\u00fcnyada demir-60 olu\u015fumunun ilk kan\u0131t\u0131, 20 y\u0131l \u00f6nce M\u00fcnih Teknik \u00dcniversitesi (TUM) ara\u015ft\u0131rma ekibi taraf\u0131ndan derin deniz yataklar\u0131nda ke\u015ffedildi.Ekipteki biliminsanlar\u0131ndan Dr. Gunther Korschinek, saf, el de\u011fmemi\u015f Antarktika kar\u0131nda da y\u0131ld\u0131z patlamas\u0131 izlerinin bulunabilece\u011fini \u00f6ne s\u00fcrd\u00fc. Bu varsay\u0131m\u0131 do\u011frulamak i\u00e7in, Alfred Wegener Enstit\u00fcs\u00fc\u2019nden Dr. Sepp Kipfstuhl, Antarktika\u2019daki bir konteyn\u0131r yerle\u015fimi olan Kohnen \u0130stasyonu\u2019ndan 500 kg kar toplad\u0131 ve analiz i\u00e7in M\u00fcnih\u2019e nakletti. Orada, bir TUM ekibi kar\u0131 eritti ve erimi\u015f suyukat\u0131 bile\u015fenlerden ay\u0131rd\u0131. Helmholtz-Zentrum<\/p>\n

Dresden-Rossendorf\u2019ta (HZDR) \u00e7e\u015fitli kimyasal y\u00f6ntemler kullan\u0131larak i\u015flendi; b\u00f6ylece sonraki analiz i\u00e7in gereken demir miligram aral\u0131\u011f\u0131nda elde edildi ve numuneler M\u00fcnih\u2019e geri g\u00f6nderilebildi. TUM\u2019da n\u00fckleer fizik, par\u00e7ac\u0131k fizi\u011fi ve astrofizik ara\u015ft\u0131rma alanlar\u0131nda \u00e7al\u0131\u015fan Korschinek ve Dominik Koll, M\u00fcnih yak\u0131nlar\u0131ndaki Garching\u2019de bir h\u0131zland\u0131r\u0131c\u0131 laboratuvar\u0131 kullanarak \u00f6rneklerde be\u015f demir-60 atomu buldu. Koll, \u201cAnalizlerimiz; kozmik radyasyon, n\u00fckleer silah testleri veya reakt\u00f6r kazalar\u0131n\u0131, demir-60\u2019\u0131n olas\u0131 kaynaklar\u0131n\u0131n aras\u0131ndan elememize izin verdi\u201d diyor. \u201cD\u00fcnyada bu radyoaktif izotop i\u00e7in do\u011fal kaynaklar olmad\u0131\u011f\u0131ndan dolay\u0131, demir-60\u2019\u0131n bir s\u00fcpernovadan gelmesi gerekti\u011fini biliyorduk.\u201d<\/p>\n

\"\"
Antarktika kar\u0131ndaki demir-60’\u0131n, G\u00fcne\u015f Sistemi\u2019mizin i\u00e7inde bulundu\u011fu bir gaz bulutlar\u0131 birikintisinden geldi\u011fi varsay\u0131l\u0131yor<\/figcaption><\/figure>\n

Y\u0131ld\u0131z tozu y\u0131ld\u0131zlararas\u0131 b\u00f6lgeden geliyor<\/strong>
\nAra\u015ft\u0131rma ekibi, demir-60\u2019\u0131n D\u00fcnya\u2019ya ne zaman \u00e7\u00f6keldi\u011fine ili\u015fkin nispeten kesin bir saptama yapabildi: Analiz edilen kar tabakas\u0131 20 y\u0131ldan daha eski de\u011fildi.\u00dcstelik, ke\u015ffedilen demir izotopunun, \u00f6zellikle uzak y\u0131ld\u0131z patlamalar\u0131ndan gelmedi\u011fi g\u00f6r\u00fcld\u00fc; e\u011fer durum b\u00f6yle olsayd\u0131, demir-60 tozu, evrende ald\u0131\u011f\u0131 yol boyunca \u00e7ok fazla da\u011f\u0131l\u0131rd\u0131. Demir-60\u2019\u0131n yar\u0131 \u00f6mr\u00fcne dayanarak, D\u00fcnya\u2019n\u0131n olu\u015fumundan kaynaklanan herhangi bir atomun \u015fimdiye kadar tamamen bozunmu\u015f oldu\u011funu s\u00f6yleyebiliriz. Bu nedenle Koll, Antarktika kar\u0131ndaki demir-60\u2019\u0131n, y\u0131ld\u0131zlararas\u0131 b\u00f6lgeden, \u00f6rne\u011fin G\u00fcne\u015f Sistemi\u2019mizin i\u00e7inde bulundu\u011fu bir gaz bulutlar\u0131 birikintisinden geldi\u011fini varsay\u0131yor.<\/p>\n

Korschinek, \u201cG\u00fcne\u015f Sistemi\u2019miz yakla\u015f\u0131k 40.000 y\u0131l \u00f6nce bu bulutlardan birinin i\u00e7ine girdi ve birka\u00e7 biny\u0131l i\u00e7inde \u00e7\u0131kacak. E\u011fer gaz bulutu hipotezi do\u011fruysa, 40.000 y\u0131ldan daha eski buz \u00e7ekirdeklerinden elde edilen \u00f6rnekler y\u0131ld\u0131zlararas\u0131 demir-60 i\u00e7ermez.Bu, G\u00fcne\u015f Sistemi\u2019nin gaz bulutundan ge\u00e7i\u015fini do\u011frulamam\u0131z\u0131 sa\u011flar ve G\u00fcne\u015f Sistemi\u2019nin \u00e7evresini \u00e7al\u0131\u015fan ara\u015ft\u0131rmac\u0131lar i\u00e7in \u00e7\u0131\u011f\u0131r a\u00e7an bir ke\u015fif olur\u201d diyor.<\/p>\n

Kaynak:<\/strong> https:\/\/www.sciencedaily.com\/releases\/2019\/08\/
\n190820101623.htm<\/p>\n","protected":false},"excerpt":{"rendered":"

Antarktika\u2019da demir-60 izotopunun ke\u015ffi, G\u00fcne\u015f Sistemi\u2019nin \u00e7evresi hakk\u0131nda bilgi sa\u011fl\u0131yor. Nadir izotop demir-60, b\u00fcy\u00fck y\u0131ld\u0131z patlamalar\u0131nda yarat\u0131lm\u0131\u015ft\u0131r. Bu izotopun yaln\u0131zca \u00e7ok k\u00fc\u00e7\u00fck bir miktar\u0131 uzak y\u0131ld\u0131zlardan D\u00fcnya\u2019ya ula\u015f\u0131r. \u00dcyelerinin \u00f6nemli bir k\u0131sm\u0131n\u0131 M\u00fcnih Teknik \u00dcniversitesi\u2019nden (TUM)kat\u0131l\u0131mc\u0131lar\u0131n olu\u015fturdu\u011fu bir ara\u015ft\u0131rma ekibi, Antarktika kar\u0131nda demir-60\u2019\u0131 ke\u015ffetti. Biliminsanlar\u0131, demir izotopunun y\u0131ld\u0131zlararas\u0131 b\u00f6lgeden geldi\u011fini \u00f6ne s\u00fcr\u00fcyor. Her y\u0131l D\u00fcnya\u2019ya […]<\/p>\n","protected":false},"author":2071,"featured_media":36292,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19],"tags":[3186,297,827,1780],"class_list":["post-36291","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bilim-gundemi","tag-antarktika","tag-gunes-sistemi","tag-nukleer","tag-yildiz"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/posts\/36291","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/users\/2071"}],"replies":[{"embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/comments?post=36291"}],"version-history":[{"count":0,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/posts\/36291\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/media\/36292"}],"wp:attachment":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/media?parent=36291"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/categories?post=36291"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/tags?post=36291"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}