{"id":28879,"date":"2021-09-30T08:30:20","date_gmt":"2021-09-30T06:30:20","guid":{"rendered":"https:\/\/karmaka.de\/?p=28879"},"modified":"2021-09-30T08:30:21","modified_gmt":"2021-09-30T06:30:21","slug":"fossil-records-of-early-solar-irradiation-and-cosmolocation-of-the-cai-factory-a-reappraisal","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=28879","title":{"rendered":"Fossil records of early solar irradiation and cosmolocation of the CAI factory: A reappraisal<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>David V. Bekaert, Maureen Auro, Quinn R. Shollenberger, Ming-Chang Liu, Horst Marschall, Kevin W. Burton, Benjamin Jacobsen, Gregory A. Brennecka, Glenn J. McPherson, Richard von Mutius, Adam Sarafian, and Sune G. Nielsen<\/p>\n\n\n\n<p>Science Advances \u2022 29 Sep 2021 \u2022 Vol 7, Issue 40<\/p>\n\n\n\n<p><a href=\"https:\/\/www.science.org\/doi\/10.1126\/sciadv.abg8329\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.science.org\/doi\/epdf\/10.1126\/sciadv.abg8329\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Calcium-aluminum\u2013rich inclusions (CAIs) in meteorites carry crucial information about the environmental conditions of the nascent Solar System prior to planet formation. Based on models of 50V\u201310Be co-production by in-situ irradiation, CAIs are considered to have formed within ~0.1 AU from the proto-Sun. Here, we present vanadium (V) and strontium (Sr) isotopic co-variations in fine- and coarse-grained CAIs and demonstrate that kinetic isotope effects during partial condensation and evaporation best explain V isotope anomalies previously attributed to solar particle irradiation. We also report initial excesses of 10Be and argue that CV CAIs possess essentially a homogeneous level of 10Be, inherited during their formation. Based on numerical modeling of 50V\u201310Be co-production by irradiation, we show that CAI formation during protoplanetary disk build-up likely occurred at greater heliocentric distances than previously considered, up to planet-forming regions (~1AU), where solar particle fluxes were sufficiently low to avoid substantial in-situ irradiation of CAIs.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>David V. Bekaert, Maureen Auro, Quinn R. Shollenberger, Ming-Chang Liu, Horst Marschall, Kevin W. Burton, Benjamin Jacobsen, Gregory A. Brennecka, Glenn J. McPherson, Richard von Mutius, Adam Sarafian, and Sune G. Nielsen Science Advances \u2022&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66,585,72,586,71],"tags":[950,416,1846,1718,3830,2173,1348,414],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/28879"}],"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=28879"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/28879\/revisions"}],"predecessor-version":[{"id":28880,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/28879\/revisions\/28880"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=28879"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28879"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28879"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}