Yeni bir ara\u015ft\u0131rma bir gama \u0131\u015f\u0131n\u0131 haritas\u0131ndaki 14 \u0131\u015f\u0131k ucunun “antiy\u0131ld\u0131zlara” (antimaddeden olu\u015fmu\u015f y\u0131ld\u0131zlar) uyabilece\u011fini g\u00f6steriyor. Bu antiy\u0131ld\u0131z adaylar\u0131, antimadde (maddenin kar\u015f\u0131t y\u00fckl\u00fc kar\u015f\u0131l\u0131\u011f\u0131) normal maddeyle bulu\u015fup yok oldu\u011funda \u00fcretilen t\u00fcrden gama \u0131\u015f\u0131nlar\u0131 yay\u0131yor gibi g\u00f6r\u00fcn\u00fcyor. Yer\u00e7ekimleri normal maddeyi y\u0131ld\u0131zlararas\u0131 bo\u015fluktan \u00e7ekti\u011fi i\u00e7in bu \u0131\u015f\u0131nlar antiy\u0131ld\u0131zlar\u0131n y\u00fczeyinde olu\u015fabilir.<\/p>\n
\u201cE\u011fer biri \u015fans eseri antiy\u0131ld\u0131zlar\u0131n varl\u0131\u011f\u0131n\u0131 kan\u0131tlarsa bu standart kozmolojik model i\u00e7in b\u00fcy\u00fck bir darbe olur. Bu evrenin erken d\u00f6nemlerinde ne oldu\u011funa dair bilgimiz ger\u00e7ekten \u00f6nemli bir de\u011fi\u015fikli\u011fe u\u011frar\u201d diyor Pierre Salati (Annecy-le-Vieux Teorik Fizik Laboratuvar\u0131\u2019nda astrofizik\u00e7i.)<\/p>\n
Genel bir d\u00fc\u015f\u00fcnce olarak evrenin e\u015fit \u00f6l\u00e7\u00fclerde madde ve antimadde ile do\u011fdu\u011funu, modern evrenin neredeyse hi\u00e7 antimadde bar\u0131nd\u0131rmad\u0131\u011f\u0131 d\u00fc\u015f\u00fcn\u00fcl\u00fcr. Fizik\u00e7iler evrenin evrim ge\u00e7irdi\u011fini, baz\u0131 s\u00fcre\u00e7lerin, madde par\u00e7ac\u0131klar\u0131n\u0131n \u00e7ok say\u0131da antimadde versiyonlar\u0131na yol a\u00e7t\u0131\u011f\u0131 d\u00fc\u015f\u00fcn\u00fcyor. Fakat Uluslararas\u0131 Uzay \u0130stasyonu\u2019nda bir cihaz, birka\u00e7 antihelyum \u00e7ekirde\u011finin ipu\u00e7lar\u0131n\u0131 tespit ederek bu varsay\u0131m \u00fczerinde \u015f\u00fcphe uyand\u0131rd\u0131. E\u011fer bu g\u00f6zlemler onaylan\u0131rsa, bu t\u00fcr ba\u015f\u0131bo\u015f antimadde antiy\u0131ld\u0131zlar taraf\u0131ndan sa\u00e7\u0131lm\u0131\u015f olabilir.<\/p>\n
Evrenin baz\u0131 antimaddelerinin y\u0131ld\u0131z \u015feklinde hayatta kalabilece\u011fi d\u00fc\u015f\u00fcncesi ile bir ara\u015ft\u0131rma ekibi Fermi Gamma I\u015f\u0131n\u0131 Uzay Teleskopu\u2019ndan 10 y\u0131ll\u0131k g\u00f6zlemleri inceledi. Katalogdaki neredeyse 5,800 gama \u0131\u015f\u0131n\u0131 kayna\u011f\u0131 aras\u0131nda 14 \u0131\u015f\u0131k noktas\u0131 madde-antimadde yok olmas\u0131ndan beklenen enerjilere sahip gama \u0131\u015f\u0131nlar\u0131 yayd\u0131 ancak pulsar veya karadelik gibi bilinen di\u011fer herhangi bir gama \u0131\u015f\u0131n\u0131 kayna\u011f\u0131 t\u00fcr\u00fcne benzemiyordu.<\/p>\n
Fermi teleskobunun hassasiyetinden yararlanarak ve say\u0131ca g\u00f6zlemlenmi\u015f adaylara bakarak solar b\u00f6lgemizde ne kadar antiy\u0131ld\u0131z\u0131n var oldu\u011funu hesaplad\u0131lar. E\u011fer antiy\u0131ld\u0131zlar normal maddeden olu\u015fan toz ve gazlarla birle\u015febilecekleri Samanyolu d\u00fczleminde var olurlarsa g\u00f6zlemlenmesi kolay bir \u015fekilde \u00e7ok fazla gama \u0131\u015f\u0131n\u0131 yayabilirlerdi. Sonu\u00e7 olarak tespit edilen bir avu\u00e7 adaydan her 400.000 normal y\u0131ld\u0131z i\u00e7in yaln\u0131zca bir antiy\u0131ld\u0131z\u0131n var oldu\u011fu anlam\u0131na geliyor.<\/p>\n
E\u011fer antiy\u0131ld\u0131zlar galaksi d\u00fczleminin d\u0131\u015f\u0131nda var olmaya e\u011filimli olurlarsa normal maddeyi biriktirmek i\u00e7in \u00e7ok az f\u0131rsatlar\u0131 olacak ve bulunmas\u0131 daha zor olacakt\u0131. Bu senaryoda her 10 normal y\u0131ld\u0131z aras\u0131nda gizlenen bir antiy\u0131ld\u0131z olabilirdi. Fakat herhangi g\u00f6ksel bir cismin antiy\u0131ld\u0131z oldu\u011funu kan\u0131tlamak \u00e7ok zor \u00e7\u00fcnk\u00fc madde-antimadde yok olmas\u0131ndan \u00e7\u0131kan gama \u0131\u015f\u0131nlar\u0131n\u0131n yan\u0131 s\u0131ra antiy\u0131ld\u0131zlar\u0131n yayd\u0131\u011f\u0131 \u0131\u015f\u0131\u011f\u0131n normal y\u0131ld\u0131zlardan \u00e7\u0131kan \u0131\u015f\u0131\u011f\u0131n ayn\u0131 olmas\u0131 bekleniyordu.<\/p>\n
Fransa’daki Astrofizik Ara\u015ft\u0131rma Enstit\u00fcs\u00fc’nden astrofizik\u00e7i Simon Dupourqu\u00e9, \u201cAdaylar\u0131n ger\u00e7ekten antiy\u0131ld\u0131z oldu\u011funu kan\u0131tlamak neredeyse imkans\u0131z, \u00e7\u00fcr\u00fctmek \u00e7ok daha kolay olurdu\u201d diyor. Astronomlar onlar\u0131n ger\u00e7ekten pulsarlar olmad\u0131\u011f\u0131n\u0131 iki kere kontrol etmek i\u00e7in adaylardan \u00e7\u0131kan gama \u0131\u015f\u0131nlar\u0131n\u0131n ve radyo sinyallerinin zaman i\u00e7erisinde nas\u0131l de\u011fi\u015fti\u011fini izliyorlard\u0131. Ayn\u0131 zamanda adaylar\u0131n ger\u00e7ekten karadelik olduklar\u0131n\u0131 belirtecek optik ve k\u0131z\u0131l\u00f6tesi sinyallere de bakabilirlerdi.<\/p>\n
Charlottesville\u2019daki Virginia \u00dcniversitesi\u2019nde ara\u015ft\u0131rmalar\u0131n\u0131 s\u00fcrd\u00fcren, \u00e7al\u0131\u015fmaya dahil olmayan fizik\u00e7i Julian Heeck, \u201cA\u00e7\u0131k\u00e7as\u0131 bu hala ba\u015flang\u0131\u00e7 niteli\u011finde.. fakat ilgin\u00e7\u201d diyor. Antiy\u0131ld\u0131zlar\u0131n varl\u0131\u011f\u0131 \u00f6nemli miktarda antimaddenin bir \u015fekilde uzay\u0131n izole olmu\u015f k\u0131s\u0131mlar\u0131nda hayatta kalmay\u0131 ba\u015fard\u0131\u011f\u0131n\u0131 g\u00f6sterdi. Ancak Heeck e\u011fer varlarsa antiy\u0131ld\u0131zlar\u0131n evrenin t\u00fcm eksik antimaddesini a\u00e7\u0131klayacak kadar bol olaca\u011f\u0131ndan \u015f\u00fcphe ediyor: \u201cMaddenin neden antimaddeden daha bask\u0131n oldu\u011funa dair hala bir a\u00e7\u0131klamaya ihtiyac\u0131m\u0131z var.\u201d<\/p>\n
Kaynak:<\/strong> https:\/\/www.sciencenews.org\/article\/antimatter-stars-antistars-milky-way-galaxy-space-astronomy<\/p>\n","protected":false},"excerpt":{"rendered":" Yeni bir ara\u015ft\u0131rma bir gama \u0131\u015f\u0131n\u0131 haritas\u0131ndaki 14 \u0131\u015f\u0131k ucunun “antiy\u0131ld\u0131zlara” (antimaddeden olu\u015fmu\u015f y\u0131ld\u0131zlar) uyabilece\u011fini g\u00f6steriyor. Bu antiy\u0131ld\u0131z adaylar\u0131, antimadde (maddenin kar\u015f\u0131t y\u00fckl\u00fc kar\u015f\u0131l\u0131\u011f\u0131) normal maddeyle bulu\u015fup yok oldu\u011funda \u00fcretilen t\u00fcrden gama \u0131\u015f\u0131nlar\u0131 yay\u0131yor gibi g\u00f6r\u00fcn\u00fcyor. Yer\u00e7ekimleri normal maddeyi y\u0131ld\u0131zlararas\u0131 bo\u015fluktan \u00e7ekti\u011fi i\u00e7in bu \u0131\u015f\u0131nlar antiy\u0131ld\u0131zlar\u0131n y\u00fczeyinde olu\u015fabilir. \u201cE\u011fer biri \u015fans eseri antiy\u0131ld\u0131zlar\u0131n varl\u0131\u011f\u0131n\u0131 kan\u0131tlarsa […]<\/p>\n","protected":false},"author":3113,"featured_media":42943,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[30,19],"tags":[7676,2239,1748,1780],"class_list":["post-50226","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-astronomi","category-bilim-gundemi","tag-antimadde","tag-karadelik","tag-samanyolu","tag-yildiz"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/posts\/50226","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\/3113"}],"replies":[{"embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/comments?post=50226"}],"version-history":[{"count":0,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/posts\/50226\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/media\/42943"}],"wp:attachment":[{"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/media?parent=50226"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/categories?post=50226"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bilimvegelecek.com.tr\/index.php\/wp-json\/wp\/v2\/tags?post=50226"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}