{"id":30639,"date":"2022-05-24T06:57:23","date_gmt":"2022-05-24T04:57:23","guid":{"rendered":"https:\/\/karmaka.de\/?p=30639"},"modified":"2022-05-24T06:57:24","modified_gmt":"2022-05-24T04:57:24","slug":"the-dissipation-of-the-solar-nebula-constrained-by-impacts-and-core-cooling-in-planetesimals","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=30639","title":{"rendered":"The dissipation of the solar nebula constrained by impacts and core cooling in planetesimals"},"content":{"rendered":"\n<p>Alison C. Hunt, Karen J. Theis, Mark Rehk\u00e4mper, Gretchen K. Benedix, Rasmus Andreasen &amp; Maria Sch\u00f6nb\u00e4chler<\/p>\n\n\n\n<p>Nature Astronomy<br>Published: 23 May 2022<\/p>\n\n\n\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41550-022-01675-2\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Rapid cooling of planetesimal cores has been inferred for several iron meteorite parent bodies on the basis of metallographic cooling rates, and linked to the loss of their insulating mantles during impacts. However, the timing of these disruptive events is poorly constrained. Here, we used the short-lived 107Pd\u2013107Ag decay system to date rapid core cooling by determining Pd\u2013Ag ages for iron meteorites. We show that closure times for the iron meteorites equate to cooling in the time frame ~7.8\u201311.7\u2009Myr after calcium\u2013aluminium-rich inclusion formation, and that they indicate that an energetic inner Solar System persisted at this time. This probably results from the dissipation of gas in the protoplanetary disk, after which the damping effect of gas drag ceases. An early giant planet instability between 5 and 14\u2009Myr after calcium\u2013aluminium-rich inclusion formation could have reinforced this effect. This correlates well with the timing of impacts recorded by the Pd\u2013Ag system for iron meteorites.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Alison C. Hunt, Karen J. Theis, Mark Rehk\u00e4mper, Gretchen K. Benedix, Rasmus Andreasen &amp; Maria Sch\u00f6nb\u00e4chler Nature AstronomyPublished: 23 May 2022 LINK &#8220;Rapid cooling of planetesimal cores has been inferred for several iron meteorite parent&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[72,214,420,71],"tags":[1540,4188,1874,4515,257],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/30639"}],"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=30639"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/30639\/revisions"}],"predecessor-version":[{"id":30640,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/30639\/revisions\/30640"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=30639"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=30639"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=30639"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}