{"id":21812,"date":"2020-04-22T08:47:08","date_gmt":"2020-04-22T06:47:08","guid":{"rendered":"http:\/\/karmaka.de\/?p=21812"},"modified":"2020-05-11T14:27:55","modified_gmt":"2020-05-11T12:27:55","slug":"style-and-intensity-of-hydration-among-c-complex-asteroids-a-comparison-to-dessicated-carbonaceous-chondrites","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=21812","title":{"rendered":"Style and intensity of hydration among C-complex asteroids: a comparison to dessicated carbonaceous chondrites<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>S. Potin, P. Beck, F. Usui, L. Bonal, P. Vernazza, B. Schmitt<\/p>\n\n\n\n<p>Accepted for publication in Icarus<\/p>\n\n\n\n<p><a href=\"https:\/\/arxiv.org\/ftp\/arxiv\/papers\/2004\/2004.09872.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p>Update (11 May 2020): <a rel=\"noreferrer noopener\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0019103520302086\" target=\"_blank\"><strong>LINK<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Here we report a comparison between reflectance spectroscopy of meteorites under asteroidal environment (high vacuum and temperature) and Main Belt and Near Earth Asteroids spectra. Focusing on the \u2013OH absorption feature around 3\u03bcm, we show that the asteroidal environment induces a reduction of depth and width of the band, as well as a shift of the reflectance minimum. We then decompose the \u2013OH feature into several components with a new model using Exponentially Modified Gaussians. Unlike previous studies, we confirm the link between these components, the aqueous alteration history and the amount of water molecules inside of the sample, using the shape of this spectral feature only. We then apply this deconvolution model to asteroids spectra which were obtained with a space-borne telescope and two space probes, and find a strong similarity with the components detected on meteorites, and among asteroids from a same type. Based on the conclusions drawn from our meteorites experiment, we suggest to use the 3-\u03bcm band as a tracer of the alteration history of the small bodies. Using the 3-\u03bcm band only, we show that Ryugu has been heavily altered by water, which is consistent with its parent body being covered with water ice, then went through a high temperature sequence, over 400\u00b0C. We also point out that the 3-\u03bcm band of Bennu shows signs of its newly discovered surface activity.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>S. Potin, P. Beck, F. Usui, L. Bonal, P. Vernazza, B. Schmitt Accepted for publication in Icarus PDF (OPEN ACCESS) Update (11 May 2020): LINK &#8220;Here we report a comparison between reflectance spectroscopy of meteorites&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61,77,2350,9,4909,10,18,12,2243,552,62],"tags":[5518,1400,5517,3979,5519,1842,553,1974,3991,3273,1809,105,1810,5520,512,1050,1585,1053,510,107,4827,110,1055,1480,4684,4693,1581],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21812"}],"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=21812"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21812\/revisions"}],"predecessor-version":[{"id":22026,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21812\/revisions\/22026"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21812"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21812"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21812"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}