{"id":41546,"date":"2026-04-27T18:57:28","date_gmt":"2026-04-27T16:57:28","guid":{"rendered":"https:\/\/karmaka.de\/?p=41546"},"modified":"2026-04-27T18:57:29","modified_gmt":"2026-04-27T16:57:29","slug":"do-all-asteroids-break-down-in-the-same-way","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=41546","title":{"rendered":"Do all asteroids break down in the same way?<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Nicole Latsia, Erika Kaufmann, Georgios Tsirvoulis, Heikki Suhonen, Mikael Granvik , Johan Borg, Axel Hagermann<\/p>\n\n\n\n<p>Icarus<br>Available online 27 April 2026, 117130<\/p>\n\n\n\n<p><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S001910352600196X\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK + PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p>&#8220;Highlights<\/p>\n\n\n\n<ul>\n<li>Real-time fracturing investigation of asteroid analogues.<\/li>\n\n\n\n<li>Thermal fatigue is threshold-controlled.<\/li>\n\n\n\n<li>Meteorite type controls damage evolution.&#8221;<\/li>\n<\/ul>\n\n\n\n<p class=\"justify-text\">&#8220;Thermal fatigue is considered a primary mechanism driving rock disaggregation and regolith production on the surface of airless planetary bodies, acting over millions to billions of diurnal temperature cycles. However, its long-term effectiveness has never been experimentally tested. In particular, the Kaiser effect suggests that no additional damage is expected to accumulate when a material is subjected to repeated loading at the same maximum stress level. Here, we use real-time acoustic emission (AE) monitoring to track fracture activity during 100 repeated thermal cycles of T = 190 \u00b0C on three meteorites of different petrological type; CM2 Aguas Zarcas, CV3 Allende, and H3-5 Oum Dreyga. The CM2 meteorite exhibited early onset of fracturing activity as indicated by increased AE activity, whereas the CV3 and H3-5 samples showed low activity, with AE occurring predominantly during the later cycles, but ceasing towards the end. These findings suggest that the surfaces of Ch\/Cgh-type asteroids, represented by CM2 material, are likely to be more susceptible to thermally driven regolith production, but this response is progressively limited due to threshold-controlled fracturing, whereas S-type bodies, linked to ordinary chondrites, may experience comparatively limited thermal fatigue under similar conditions. CV3 material, analogous to certain anhydrous C-complex\/K-type asteroids, likewise appears relatively resistant to damage accumulation across repeated thermal cycles. We propose that thermal fatigue is a threshold-controlled process rather than an indefinitely acting mechanism.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nicole Latsia, Erika Kaufmann, Georgios Tsirvoulis, Heikki Suhonen, Mikael Granvik , Johan Borg, Axel Hagermann IcarusAvailable online 27 April 2026, 117130 LINK + PDF (OPEN ACCESS) &#8220;Highlights &#8220;Thermal fatigue is considered a primary mechanism driving&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77,2350,9,6243,18,14,6,5734,7,3035,1184],"tags":[4965,108,1854,263,7135,4343],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/41546"}],"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=41546"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/41546\/revisions"}],"predecessor-version":[{"id":41547,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/41546\/revisions\/41547"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=41546"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41546"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41546"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}