{"id":18143,"date":"2019-03-11T06:35:34","date_gmt":"2019-03-11T05:35:34","guid":{"rendered":"http:\/\/karmaka.de\/?p=18143"},"modified":"2019-03-11T06:40:45","modified_gmt":"2019-03-11T05:40:45","slug":"on-beryllium-10-production-in-gaseous-protoplanetary-disks-and-implications-on-the-astrophysical-setting-of-refractory-inclusions","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=18143","title":{"rendered":"On beryllium-10 production in gaseous protoplanetary disks and implications on the astrophysical setting of refractory inclusions<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Emmanuel Jacquet<\/p>\n\n\n\n<p>Accepted to Astronomy &amp; Astrophysics<\/p>\n\n\n\n<p><a href=\"https:\/\/arxiv.org\/pdf\/1903.03108\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Calcium-Aluminum-rich Inclusions (CAIs), the oldest known solids of the solar system, show evidence for the past presence of short-lived radionuclide beryllium-10, which was likely produced by spallation during protosolar flares. While such 10Be production has hitherto been modeled at the inner edge of the protoplanetary disk, I calculate here that spallation at the disk surface may reproduce the measured 10Be\/9Be ratios at larger heliocentric distances. Beryllium-10 production in the gas prior to CAI formation would dominate that in the solid. Interestingly, provided the Sun&#8217;s proton to X-ray output ratio does not decrease strongly, 10Be\/9Be at the CAI condensation front would increase with time, explaining the reduced values in a (presumably early) generation of CAIs with nucleosynthetic anomalies. CAIs thus need not have formed very close to the Sun and may have condensed at 0.1-1 AU where sufficiently high temperatures originally prevailed. &#8220;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Emmanuel Jacquet Accepted to Astronomy &amp; Astrophysics PDF (OPEN ACCESS) &#8220;Calcium-Aluminum-rich Inclusions (CAIs), the oldest known solids of the solar system, show evidence for the past presence of short-lived radionuclide beryllium-10, which was likely produced&#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":[950,3635,1273,1846,3830,135],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/18143"}],"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=18143"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/18143\/revisions"}],"predecessor-version":[{"id":18144,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/18143\/revisions\/18144"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}