{"id":36446,"date":"2024-07-24T22:13:45","date_gmt":"2024-07-24T20:13:45","guid":{"rendered":"https:\/\/karmaka.de\/?p=36446"},"modified":"2024-07-24T22:13:46","modified_gmt":"2024-07-24T20:13:46","slug":"evidence-of-both-molecular-cloud-and-fluid-chemistry-in-ryugu-regolith","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=36446","title":{"rendered":"Evidence of both molecular cloud and fluid chemistry in Ryugu regolith<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Maitrayee Bose, Robert A. Root, Yunbin Guan, Jacob Eaton, Axel Wittmann, Thomas Skrmetti, Steven J. Desch<\/p>\n\n\n\n<p>Science Advances<br>24 Jul 2024<br>Vol 10, Issue 30<\/p>\n\n\n\n<p><a href=\"https:\/\/www.science.org\/doi\/10.1126\/sciadv.adp3037\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.science.org\/doi\/epdf\/10.1126\/sciadv.adp3037\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;The sulfur chemistry of (162173) Ryugu particles can be a powerful tracer of molecular cloud chemistry and small body processes, but it has not been well explored. We report identification of organosulfurs and a sulfate grain in two Ryugu particles, A0070 and A0093. The sulfate grain shows oxygen isotope ratios (\u03b417O = \u221211.0 \u00b1 4.3 per mil, \u03b418O = \u22127.8 \u00b1 2.3 per mil) that are akin to silicates in Ryugu but exhibit mass-independent sulfur isotopic fractionation (\u039433S = +5 \u00b1 2 per mil). A methionine-like coating on the sulfate grain is isotopically anomalous (\u03b415N = +62 \u00b1 2 per mil). Both the sulfate and organosulfurs can simultaneously form and survive during aqueous alteration within Ryugu\u2019s parent body, under reduced conditions, low temperature, and a pH &gt;7 in the presence of N-rich organic molecules. This work extends the heliocentric zone where anomalous sulfur, formed by selective photodissociation of H2S gas in the molecular cloud, is found.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Maitrayee Bose, Robert A. Root, Yunbin Guan, Jacob Eaton, Axel Wittmann, Thomas Skrmetti, Steven J. Desch Science Advances24 Jul 2024Vol 10, Issue 30 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;The sulfur chemistry of (162173) Ryugu particles&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77,4909,2243,1184],"tags":[3872,993,263,2051,3755,317,2118],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36446"}],"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=36446"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36446\/revisions"}],"predecessor-version":[{"id":36447,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36446\/revisions\/36447"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36446"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36446"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36446"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}