{"id":28944,"date":"2012-08-14T15:26:45","date_gmt":"2012-08-14T12:26:45","guid":{"rendered":"http:\/\/www.fyysika.ee\/uudised\/?p=28944"},"modified":"2012-08-14T15:26:45","modified_gmt":"2012-08-14T12:26:45","slug":"galaktika-keskmest-parinevad-gammakiired-voivad-vihjata-tumeainele","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=28944","title":{"rendered":"Galaktika keskmest p\u00e4rinevad gammakiired v\u00f5ivad vihjata tumeainele"},"content":{"rendered":"<p><strong>Linnutee galaktika keskmest kiirguvad gammakiirte footonid on koosk\u00f5las intrigeeriva ideega, mille kohaselt tumeaine osakesed annihilleeruvad \u00fcksteisega kosmoses. Selle ideega tulid v\u00e4lja UC Irvine&#8217;i astrof\u00fc\u00fcsikud oma artiklis, mis ilmus teadusajakirjas <em>Physical Review D<\/em>.<\/strong><\/p>\n<div id=\"attachment_28946\" style=\"width: 234px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2012\/08\/120813155529-large.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-28946\" class=\"size-medium wp-image-28946\" title=\"120813155529-large\" src=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2012\/08\/120813155529-large-224x300.jpg\" alt=\"\" width=\"224\" height=\"300\" srcset=\"https:\/\/www.fyysika.ee\/wp-content\/uploads\/2012\/08\/120813155529-large-224x300.jpg 224w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2012\/08\/120813155529-large.jpg 432w\" sizes=\"auto, (max-width: 224px) 100vw, 224px\" \/><\/a><p id=\"caption-attachment-28946\" class=\"wp-caption-text\">Fermi Gammakiirguse Kosmoseteleskoobi illustratsioon. Pilt: NASA\/General Dynamics)<\/p><\/div>\n<p>F\u00fc\u00fcsika ja Astronoomia osakonna professorid <strong>Kevork Abazajian<\/strong> ja <strong>Manoj Kaplinghat<\/strong> kogusid aastatel 2008-2012 Maad orbiteeriva NASA Fermi Gammakiirguse Kosmoseteleskoobi andmeid. Nad leidsid, et Linnutee galaktika keskmest tuleb varasemates uurimustes ennustatust rohkem footoneid. Gammakiirgus on elektromagnetkiirgus, mis tekib radioaktiivse lagunemise v\u00f5i muu k\u00f5rge energiaga osakeste protsessi k\u00e4igus, kirjutab <a href=\"http:\/\/www.sciencedaily.com\/releases\/2012\/08\/120813155529.htm\">ScienceDaily.com<\/a>.<\/p>\n<p>,,See on esimene kord, kui seda uut kiirgusallikat on sellise k\u00f5rge statistilise erinevusega t\u00e4heldatud. K\u00f5ige \u00fcllatavam on see, kuidas vaadeldud gammakiirte kuju, spekter ja kiirus on peamiste tumeaine teooriatega v\u00e4ga koosk\u00f5lalised,&#8221; lausus Abazajian. ,,Edasised v\u00e4iksema astrof\u00fc\u00fcsilise kiirgusega piirkondadest (n\u00e4iteks k\u00e4\u00e4busgalaktikatest) tehtud vaatlused m\u00e4\u00e4ravad selle, kas see ka tegelikult tumeaine allikas on.&#8221;<\/p>\n<p>Mittehelendav ja otseselt detekteerimatu tumeaine moodustab teadlaste arvates umbes 85% universumi massist. Selle olemasolu saab ennustada vaid t\u00e4nu gravitatsioonilisele m\u00f5jule, mida see n\u00e4htavale ainele avaldab. UCI teadlaste uurimus v\u00f5ib toetada selle ennustatavat olemasolu galaktikate keskmetes.<\/p>\n<p>Praegu kehtiva h\u00fcpoteesi kohaselt koosneb tumeaine n\u00f5rgalt vastastikm\u00f5justuvatest massiivsetest osakestest (<em><a href=\"http:\/\/en.wikipedia.org\/wiki\/Weakly_interacting_massive_particles\">weakly interacting massive particles<\/a><\/em> ehk WIMP). Kui kaks WIMPi kohtuvad, annihilleeruvad need ning tekivad meile tuttavamad osakesed &#8211; nende seas ka gammakiirgus.<\/p>\n<p>Kui andmet\u00f5lgendus paistab olevat tumeaine teooriaga koosk\u00f5las, v\u00f5ivad gammakiired tulla ka mujalt kui WIMPide annihilleerumisest. ,,Meie t\u00e4heldatav signaal sobitub ka pulsarite poolt kiiratavate footonitega,&#8221; lausus Kaplinghat. ,,Lisaks v\u00f5ib see l\u00e4htuda galaktika kesmes oleva gaasiga reageerivatelt k\u00f5rge energiaga osakestelt.&#8221;<\/p>\n<p><a href=\"http:\/\/www.sciencedaily.com\/releases\/2012\/08\/120813155529.htm\">Allikas<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linnutee galaktika keskmest kiirguvad gammakiirte footonid on koosk\u00f5las intrigeeriva ideega, mille kohaselt tumeaine osakesed annihilleeruvad \u00fcksteisega kosmoses. Selle ideega tulid v\u00e4lja UC Irvine&#8217;i astrof\u00fc\u00fcsikud oma artiklis, mis ilmus teadusajakirjas Physical Review D. F\u00fc\u00fcsika ja Astronoomia osakonna professorid Kevork Abazajian ja Manoj Kaplinghat kogusid aastatel 2008-2012 Maad orbiteeriva NASA Fermi Gammakiirguse Kosmoseteleskoobi andmeid. Nad leidsid, et [&hellip;]<\/p>\n","protected":false},"author":32,"featured_media":28946,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[16],"tags":[55],"class_list":{"0":"post-28944","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-teadusuudis","8":"tag-tumeaine","9":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/28944","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/32"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=28944"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/28944\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/media\/28946"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=28944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28944"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}