{"id":20412,"date":"2019-09-11T22:54:44","date_gmt":"2019-09-11T20:54:44","guid":{"rendered":"http:\/\/karmaka.de\/?p=20412"},"modified":"2019-09-11T22:54:46","modified_gmt":"2019-09-11T20:54:46","slug":"aluminum-26-chronology-of-dust-coagulation-and-early-solar-system-evolution","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=20412","title":{"rendered":"Aluminum-26 chronology of dust coagulation and early solar system evolution<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>M.-C. Liu, J. Han, A. J. Brearley and A. T. Hertwig<\/p>\n\n\n\n<p>Science Advances  11 Sep 2019:<br>\nVol. 5, no. 9, eaaw3350<br>\nDOI: 10.1126\/sciadv.aaw3350 <\/p>\n\n\n\n<p><a href=\"https:\/\/advances.sciencemag.org\/content\/5\/9\/eaaw3350\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br>\n<a href=\"https:\/\/advances.sciencemag.org\/content\/advances\/5\/9\/eaaw3350.full.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Dust condensation and coagulation in the early solar system are the first steps toward forming the terrestrial planets, but the time scales of these processes remain poorly constrained. Through isotopic analysis of small Ca-Al\u2013rich inclusions (CAIs) (30 to 100 \u03bcm in size) found in one of the most pristine chondrites, Allan Hills A77307 (CO3.0), for the short-lived 26Al-26Mg [t1\/2 = 0.72 million years (Ma)] system, we have identified two main populations of samples characterized by well-defined 26Al\/27Al = 5.40 (\u00b10.13) \u00d7 10\u22125 and 4.89 (\u00b10.10) \u00d7 10\u22125. The result of the first population suggests a 50,000-year time scale between the condensation of micrometer-sized dust and formation of inclusions tens of micrometers in size. The 100,000-year time gap calculated from the above two 26Al\/27Al ratios could also represent the duration for the Sun being a class I source.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>M.-C. Liu, J. Han, A. J. Brearley and A. T. Hertwig Science Advances 11 Sep 2019: Vol. 5, no. 9, eaaw3350 DOI: 10.1126\/sciadv.aaw3350 LINK (OPEN ACCESS) PDF (OPEN ACCESS) &#8220;Dust condensation and coagulation in the&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66,72,57,71],"tags":[238,3725,3342,1846,1356,3701],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/20412"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=20412"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/20412\/revisions"}],"predecessor-version":[{"id":20413,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/20412\/revisions\/20413"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20412"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20412"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}