{"id":36513,"date":"2024-08-21T22:17:21","date_gmt":"2024-08-21T20:17:21","guid":{"rendered":"https:\/\/karmaka.de\/?p=36513"},"modified":"2024-08-21T22:21:15","modified_gmt":"2024-08-21T20:21:15","slug":"rapid-heating-rates-define-the-volatile-emission-and-regolith-composition-of-3200-phaethon","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=36513","title":{"rendered":"Rapid heating rates define the volatile emission and regolith composition of (3200) Phaethon<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Martin D. Suttle, Lorenz. F. Olbrich, Charlotte. L. Bays &amp; Liza Riches<\/p>\n\n\n\n<p>Nature Communications, Volume 15, article number 7178, Published: 21 August 2024<\/p>\n\n\n\n<p><a href=\"https:\/\/link.springer.com\/article\/10.1038\/s41467-024-51054-w\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/link.springer.com\/content\/pdf\/10.1038\/s41467-024-51054-w.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Asteroid (3200) Phaethon experiences extreme solar radiant heating (\u2009~\u2009750\u2009\u00b0C) during perihelion (0.14 au), leading to comet-like activity. The regolith composition and mechanism of volatile emission are unknown but key to understanding JAXA\u2019s DESTINY+ mission data (fly-by in 2029) and the fate of near-Sun asteroids more generally. By subjecting CM chondrite fragments to fast, open system, cyclic heating (2-20\u2009\u00b0C\/min), simulating conditions on Phaethon we demonstrate that rapid heating rates combine with the low permeability, resulting in reactions between volatile gases and decomposing minerals. The retention of S-bearing gas limits the thermal decomposition of Fe-sulphides, allowing these minerals to survive repeated heating cycles. Slow escape of S-bearing gases provides a mechanism for repeated gas release from a thermally processed surface and, therefore the comet-like activity without requiring surface renewal to expose fresh material each perihelion cycle. We predict Phaethon regolith is composed of olivine, Fe-sulphides, Ca-sulphates and hematite.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Martin D. Suttle, Lorenz. F. Olbrich, Charlotte. L. Bays &amp; Liza Riches Nature Communications, Volume 15, article number 7178, Published: 21 August 2024 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;Asteroid (3200) Phaethon experiences extreme solar radiant&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77,9,18,3504,1184],"tags":[3992,263,1771,3273,105,1578,673,180],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36513"}],"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=36513"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36513\/revisions"}],"predecessor-version":[{"id":36514,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36513\/revisions\/36514"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}