{"id":14946,"date":"2011-03-06T17:13:44","date_gmt":"2011-03-06T14:13:44","guid":{"rendered":"http:\/\/www.fyysika.ee\/uudised\/?p=14946"},"modified":"2011-03-06T17:13:44","modified_gmt":"2011-03-06T14:13:44","slug":"suurimad-galaktikad-kasvavad-sammhaaval-nagu-lumehelbed","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=14946","title":{"rendered":"Suurimad galaktikad kasvavad sammhaaval nagu lumehelbed"},"content":{"rendered":"<p><strong>Elliptilised galaktikad v\u00f5ivad k\u00fcll olla universumi monstrumid, kuid oma elu alustavad nad samuti kui lumehelbed.<\/strong><\/p>\n<p>Juba kaua aega on arvatud et k\u00f5ige massiivsemad galaktikad moodustuvad kahe v\u00e4iksema spiraalgalaktika kokkup\u00f5rkel. Alternatiivse teooria kohaselt aga tekivad nad gaasipilve kokkuvajumisel, mille j\u00e4rel tekib tihe t\u00e4htedest koosnev tuum, mis aja jooksul kasvades v\u00e4iksemaid galaktikaid endasse neelab. See protsess on sarnane j\u00e4\u00e4kristallide kasvamisega mikroskoopilise tolmuterakese \u00fcmber kui see Maa poole langeb, moodustades nii lumehelbe, kirjutab <a href=\"http:\/\/www.newscientist.com\/article\/mg20928024.800-largest-galaxies-grow-up-gradually-like-snowflakes.html?DCMP=OTC-rss&amp;nsref=space\">newscientist.com<\/a>.<\/p>\n<p>Hiljuti leiti t\u00f5endeid, mille kohaselt massiivne elliptiline galaktika nimega NGC 1407 tekkis sel viisil. Duncan Forbes ja kolleegid Austraalias asuvast Swinburne Tehnika\u00fclikoolist tegid NGC 1407 t\u00e4hekogumike v\u00e4rvuse j\u00e4rgi kindlaks selle keemilise koostise. \u00a0Nad leidsid, et raskete elementide osakaal oli suurim tuuma keskpunktis ning v\u00e4henes sellest kaugsemal, olles koosk\u00f5las gaasipilve kokkuvajumise teooriaga. See tuleneb sellest et gravitatsioon pilve keskpunktis on tugevam kui selle \u00e4\u00e4rtes, mist\u00f5ttu rasked elemendid sinna koonduvad.<\/p>\n<p>See raskete elementide gradient ei ulatunud galaktika v\u00e4limistesse piirkondadesse. See on vastavuses juba olemasolevate v\u00e4iksemate t\u00e4hekogumite astmelise assimilatsiooniga, kirjutab Forbes&#8217;i t\u00f6\u00f6r\u00fchm oma artiklis.<\/p>\n<p><a href=\"http:\/\/www.newscientist.com\/article\/mg20928024.800-largest-galaxies-grow-up-gradually-like-snowflakes.html?DCMP=OTC-rss&amp;nsref=space\">Allikas<\/a><\/p>\n<p>Teadusartikkel &#8220;<a href=\"http:\/\/arxiv.org\/abs\/1101.3575\">Evidence for Two Phases of Galaxy Formation from Radial Trends in the Globular Cluster System of NGC 1407<\/a>&#8220;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Elliptilised galaktikad v\u00f5ivad k\u00fcll olla universumi monstrumid, kuid oma elu alustavad nad samuti kui lumehelbed. Juba kaua aega on arvatud et k\u00f5ige massiivsemad galaktikad moodustuvad kahe v\u00e4iksema spiraalgalaktika kokkup\u00f5rkel. Alternatiivse teooria kohaselt aga tekivad nad gaasipilve kokkuvajumisel, mille j\u00e4rel tekib tihe t\u00e4htedest koosnev tuum, mis aja jooksul kasvades v\u00e4iksemaid galaktikaid endasse neelab. See protsess on [&hellip;]<\/p>\n","protected":false},"author":32,"featured_media":0,"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":[],"class_list":{"0":"post-14946","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-teadusuudis","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/14946","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=14946"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/14946\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14946"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14946"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}