{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360009142506830592.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.icarus.2020.113946"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0019103520303201?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0019103520303201?httpAccept=text/plain"}},{"identifier":{"@type":"DOI","@value":"10.48550/arxiv.2008.04272"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Spin-driven evolution of asteroids' top-shapes at fast and slow spins seen from (101955) Bennu and (162173) Ryugu"}],"description":[{"notation":[{"@value":"Proximity observations by OSIRIS-REx and Hayabusa2 provided clues on the shape evolution processes of the target asteroids, (101955) Bennu and (162173) Ryugu. Their oblate shapes with equatorial ridges, or the so-called top shapes, may have evolved due to their rotational conditions at present and in the past. Different shape evolution scenarios were previously proposed; Bennu's top shape may have been driven by surface processing, while Ryugu's may have been developed due to large deformation. These two scenarios seem to be inconsistent. Here, we revisit the structural analyses in earlier works and fill a gap to connect these explanations. We also apply a semi-analytical technique for computing the cohesive strength distribution in a uniformly rotating triaxial ellipsoid to characterize the global failure of top-shaped bodies. Assuming that the structure is uniform, our semi-analytical approach describes the spatial variations in failed regions at different spin periods; surface regions are the most sensitive at longer spin periods, while interiors fail structurally at shorter spin periods. This finding suggests that the shape evolution of a top shape may vary due to rotation and internal structure, which can explain the different evolution scenarios of Bennu's and Ryugu's top shapes. We interpret our results as the indications of top shapes' various evolution processes."}]},{"notation":[{"@value":"27 pages, 1 table, 7 figures, In Press in Icarus (2020)"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380009142506831111","@type":"Researcher","foaf:name":[{"@value":"Masatoshi Hirabayashi"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830592","@type":"Researcher","foaf:name":[{"@value":"Ryota Nakano"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830731","@type":"Researcher","foaf:name":[{"@value":"Eri Tatsumi"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506831114","@type":"Researcher","foaf:name":[{"@value":"Kevin J. Walsh"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830725","@type":"Researcher","foaf:name":[{"@value":"Olivier S. Barnouin"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830733","@type":"Researcher","foaf:name":[{"@value":"Patrick Michel"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830978","@type":"Researcher","foaf:name":[{"@value":"Christine M. Hartzell"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830596","@type":"Researcher","foaf:name":[{"@value":"Daniel T. Britt"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830977","@type":"Researcher","foaf:name":[{"@value":"Seiji Sugita"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830994","@type":"Researcher","foaf:name":[{"@value":"Sei-ichiro Watanabe"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506831108","@type":"Researcher","foaf:name":[{"@value":"William F. Bottke"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830982","@type":"Researcher","foaf:name":[{"@value":"Daniel J. Scheeres"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830728","@type":"Researcher","foaf:name":[{"@value":"Ronald-Louis Ballouz"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830593","@type":"Researcher","foaf:name":[{"@value":"Yuichiro Cho"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830604","@type":"Researcher","foaf:name":[{"@value":"Tomokatsu Morota"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830600","@type":"Researcher","foaf:name":[{"@value":"Ellen S. Howell"}]},{"@id":"https://cir.nii.ac.jp/crid/1380009142506830855","@type":"Researcher","foaf:name":[{"@value":"Dante S. Lauretta"}]}],"contributor":[{"@id":"https://cir.nii.ac.jp/crid/1893962440582478977","@type":"Researcher","foaf:name":[{"@value":"Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur"}]},{"@id":"https://cir.nii.ac.jp/crid/1890865117704839172","@type":"Researcher","foaf:name":[{"@value":"Joseph Louis LAGRANGE (LAGRANGE) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; Université Côte d'Azur (UniCA)-Université Côte d'Azur (UniCA)-Centre National de la Recherche Scientifique (CNRS)"}]},{"@id":"https://cir.nii.ac.jp/crid/1890865117704839300","@type":"Researcher","foaf:name":[{"@value":"Joseph Louis LAGRANGE (LAGRANGE) ; Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)"}]},{"@id":"https://cir.nii.ac.jp/crid/1893962440582478976","@type":"Researcher","foaf:name":[{"@value":"Michel, Patrick"}]},{"@id":"https://cir.nii.ac.jp/crid/1890865117704839296","@type":"Researcher","foaf:name":[{"@value":"Joseph Louis LAGRANGE (LAGRANGE) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)"}]},{"@id":"https://cir.nii.ac.jp/crid/1893962440582478979","@type":"Researcher","foaf:name":[{"@value":"Joseph Louis LAGRANGE (LAGRANGE)"}]},{"@id":"https://cir.nii.ac.jp/crid/1893962440582478978","@type":"Researcher","foaf:name":[{"@value":"Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00191035"}],"prism:publicationName":[{"@value":"Icarus"}],"dc:publisher":[{"@value":"Elsevier 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(astro-ph.EP)"},{"@id":"https://cir.nii.ac.jp/all?q=%5BSDU.ASTR%5DSciences%20of%20the%20Universe%20%5Bphysics%5D/Astrophysics%20%5Bastro-ph%5D","dc:title":"[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]"},{"@id":"https://cir.nii.ac.jp/all?q=%5BSDU.ASTR.EP%5DSciences%20of%20the%20Universe%20%5Bphysics%5D/Astrophysics%20%5Bastro-ph%5D/Earth%20and%20Planetary%20Astrophysics%20%5Bastro-ph.EP%5D","dc:title":"[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]"},{"@id":"https://cir.nii.ac.jp/all?q=%5BSDU.ASTR.EP%5D%20Sciences%20of%20the%20Universe%20%5Bphysics%5D/Astrophysics%20%5Bastro-ph%5D/Earth%20and%20Planetary%20Astrophysics%20%5Bastro-ph.EP%5D","dc:title":"[SDU.ASTR.EP] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]"},{"@id":"https://cir.nii.ac.jp/all?q=FOS:%20Physical%20sciences","dc:title":"FOS: Physical 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Aqua-planetology"}]},{"@id":"https://cir.nii.ac.jp/crid/1040848250647688320","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"20H00194"},{"@type":"JGN","@value":"JP20H00194"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20H00194/"}],"notation":[{"@language":"ja","@value":"氷天体探査のための次世代理学測器の基礎開発"},{"@language":"en","@value":"Development of next-generation science instruments for icy-body missions"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050012570392473216","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Measurements of seismic waves induced by high-velocity impacts: Implications for seismic shaking surrounding impact craters on asteroids"},{"@value":"Measurements of seismic waves induced by high-velocity impacts: Implications for seismic shacking surrounding impact crators on 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