{"id":34015,"date":"2023-07-31T10:46:45","date_gmt":"2023-07-31T08:46:45","guid":{"rendered":"https:\/\/karmaka.de\/?p=34015"},"modified":"2023-07-31T10:46:46","modified_gmt":"2023-07-31T08:46:46","slug":"optical-spectropolarimetry-of-large-c-complex-asteroids-polarimetric-evidence-for-heterogeneous-surface-compositions","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=34015","title":{"rendered":"Optical spectropolarimetry of large C-complex asteroids: polarimetric evidence for heterogeneous surface compositions<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Yuna G. Kwon, Stefano Bagnulo, Alberto Cellino<\/p>\n\n\n\n<p>Accepted for publication in Astronomy &amp; Astrophysics<\/p>\n\n\n\n<p><a href=\"https:\/\/arxiv.org\/pdf\/2307.15441.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;This study presents the first optical spectropolarimetric study of large C-complex asteroids. A total of 64 C-complex asteroids of different subclasses are analyzed using archival polarimetric and reflectance data to refine the link between polarimetric parameters and surface properties of the asteroids. We find a consistent difference in the polarization spectra between asteroids containing phyllosilicates and those without, which correlates with the overall morphology of the reflectance spectrum. They exhibit broad similarities in polarization-phase curves; nonetheless, we observe a gradual enhancement of the negative polarization branch in the ascending order of F-B-T-Ch types, along with an increase in reflectance curvature around 500 nm. Our observations suggest at least for large C-complex asteroids a common mechanism underlies the diversity in optical properties. The observed trends would be explained by the surface composition of the asteroids, particularly optical heterogeneity caused by carbon&#8217;s varying levels of optical influence, primarily regulated by aqueous alteration of the surfaces.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Yuna G. Kwon, Stefano Bagnulo, Alberto Cellino Accepted for publication in Astronomy &amp; Astrophysics PDF (OPEN ACCESS) &#8220;This study presents the first optical spectropolarimetric study of large C-complex asteroids. A total of 64 C-complex asteroids&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77,130,1184],"tags":[1854,1771,1974,1479],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34015"}],"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=34015"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34015\/revisions"}],"predecessor-version":[{"id":34016,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34015\/revisions\/34016"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=34015"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=34015"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=34015"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}