{"@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/1361699993539630080.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1126/science.1140514"}},{"identifier":{"@type":"URI","@value":"https://www.science.org/doi/pdf/10.1126/science.1140514"}}],"dc:title":[{"@value":"Large Longitude Libration of Mercury Reveals a Molten Core"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>\n            Observations of radar speckle patterns tied to the rotation of Mercury establish that the planet occupies a Cassini state with obliquity of 2.11 ± 0.1 arc minutes. The measurements show that the planet exhibits librations in longitude that are forced at the 88-day orbital period, as predicted by theory. The large amplitude of the oscillations, 35.8 ± 2 arc seconds, together with the Mariner 10 determination of the gravitational harmonic coefficient\n            <jats:italic>C</jats:italic>\n            <jats:sub>22</jats:sub>\n            , indicates that the mantle of Mercury is decoupled from a core that is at least partially molten.\n          </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380302865717198721","@type":"Researcher","foaf:name":[{"@value":"J. L. Margot"}],"jpcoar:affiliationName":[{"@value":"Department of Astronomy, Cornell University, 304 Space Sciences Building, Ithaca, NY 14853, USA."},{"@value":"Department of Physics, University of California, Santa Barbara, CA 93106, USA."},{"@value":"Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA."},{"@value":"Space Research Institute, Moscow, Russian Federation."}]},{"@id":"https://cir.nii.ac.jp/crid/1381699993539630081","@type":"Researcher","foaf:name":[{"@value":"S. J. Peale"}],"jpcoar:affiliationName":[{"@value":"Department of Astronomy, Cornell University, 304 Space Sciences Building, Ithaca, NY 14853, USA."},{"@value":"Department of Physics, University of California, Santa Barbara, CA 93106, USA."},{"@value":"Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA."},{"@value":"Space Research Institute, Moscow, Russian Federation."}]},{"@id":"https://cir.nii.ac.jp/crid/1381699993539630080","@type":"Researcher","foaf:name":[{"@value":"R. F. Jurgens"}],"jpcoar:affiliationName":[{"@value":"Department of Astronomy, Cornell University, 304 Space Sciences Building, Ithaca, NY 14853, USA."},{"@value":"Department of Physics, University of California, Santa Barbara, CA 93106, USA."},{"@value":"Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA."},{"@value":"Space Research Institute, Moscow, Russian Federation."}]},{"@id":"https://cir.nii.ac.jp/crid/1381699993539630083","@type":"Researcher","foaf:name":[{"@value":"M. A. Slade"}],"jpcoar:affiliationName":[{"@value":"Department of Astronomy, Cornell University, 304 Space Sciences Building, Ithaca, NY 14853, USA."},{"@value":"Department of Physics, University of California, Santa Barbara, CA 93106, USA."},{"@value":"Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA."},{"@value":"Space Research Institute, Moscow, Russian Federation."}]},{"@id":"https://cir.nii.ac.jp/crid/1381699993539630084","@type":"Researcher","foaf:name":[{"@value":"I. V. Holin"}],"jpcoar:affiliationName":[{"@value":"Department of Astronomy, Cornell University, 304 Space Sciences Building, Ithaca, NY 14853, USA."},{"@value":"Department of Physics, University of California, Santa Barbara, CA 93106, USA."},{"@value":"Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA."},{"@value":"Space Research Institute, Moscow, Russian Federation."}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00368075"},{"@type":"EISSN","@value":"10959203"}],"prism:publicationName":[{"@value":"Science"}],"dc:publisher":[{"@value":"American Association for the Advancement of Science (AAAS)"}],"prism:publicationDate":"2007-05-04","prism:volume":"316","prism:number":"5825","prism:startingPage":"710","prism:endingPage":"714"},"reviewed":"false","url":[{"@id":"https://www.science.org/doi/pdf/10.1126/science.1140514"}],"createdAt":"2007-05-03","modifiedAt":"2024-01-10","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050285299888376064","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Pressure and Composition Effects on Sound Velocity and Density of Core‐Forming Liquids: Implication to Core Compositions of Terrestrial Planets"}]},{"@id":"https://cir.nii.ac.jp/crid/1050578360728597376","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Sound velocity and elastic properties of Fe–Ni–S–Si liquid: the effects of pressure and multiple light elements"}]},{"@id":"https://cir.nii.ac.jp/crid/1360025430204387712","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Liquid Structure of Iron and Iron–Nitrogen–Carbon Alloys Within the Cores of Small Terrestrial Bodies"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848654733925632","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Microscopic structural change in a liquid Fe‐C alloy of ~5 GPa"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848663334934400","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Phase transition boundary between fcc and hcp structures in Fe-Si alloy and its implications for terrestrial planetary cores"}]},{"@id":"https://cir.nii.ac.jp/crid/1361694369215015296","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"An International Survey of Front-end Receivers and Observing Performance of Telescopes for Radio Astronomy"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204303011200","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Interior Structure of Solar System Bodies"},{"@language":"ja","@value":"惑星内部構造"},{"@language":"ja-Kana","@value":"ワクセイ ナイブ コウゾウ"}]},{"@id":"https://cir.nii.ac.jp/crid/2050588891962969216","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Melting relations in the Fe-S-Si system at high pressure and temperature : implications for the planetary core"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1126/science.1140514"},{"@type":"CROSSREF","@value":"10.1029/2024je008599_references_DOI_EL9uWFDVzq6V3HEsGdgqdnWYs05"},{"@type":"CROSSREF","@value":"10.1186/s40645-017-0125-x_references_DOI_EL9uWFDVzq6V3HEsGdgqdnWYs05"},{"@type":"CROSSREF","@value":"10.2138/am-2019-6636_references_DOI_EL9uWFDVzq6V3HEsGdgqdnWYs05"},{"@type":"CROSSREF","@value":"10.1007/s00269-023-01243-8_references_DOI_EL9uWFDVzq6V3HEsGdgqdnWYs05"},{"@type":"CROSSREF","@value":"10.4294/zisin.61.285_references_DOI_EL9uWFDVzq6V3HEsGdgqdnWYs05"},{"@type":"CROSSREF","@value":"10.1002/2015gl064271_references_DOI_EL9uWFDVzq6V3HEsGdgqdnWYs05"},{"@type":"CROSSREF","@value":"10.1029/2019je005936_references_DOI_EL9uWFDVzq6V3HEsGdgqdnWYs05"},{"@type":"CROSSREF","@value":"10.1088/1538-3873/ab1f7e_references_DOI_EL9uWFDVzq6V3HEsGdgqdnWYs05"}]}