{"created":"2023-07-27T06:25:19.630531+00:00","id":8578,"links":{},"metadata":{"_buckets":{"deposit":"506f333a-80d0-49c5-9efb-cbcdefec93c2"},"_deposit":{"created_by":3,"id":"8578","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"8578"},"status":"published"},"_oai":{"id":"oai:kanazawa-u.repo.nii.ac.jp:00008578","sets":["934:935:936"]},"author_link":["10640","1151","459"],"item_4_biblio_info_8":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2012-02-22","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageStart":"021132","bibliographicVolumeNumber":"85","bibliographic_titles":[{"bibliographic_title":"Physical Review E - Statistical, Nonlinear, and Soft Matter Physics"}]}]},"item_4_description_21":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"By means of N-body simulations, we study the evolution of gravity-dominated systems from an early relaxation to a collapse, focusing on the velocity distributions and thermodynamic properties. To simulate the dynamical evolution, we consider self-gravitating small N-body systems enclosed in a spherical container with adiabatic or semipermeable walls. It is demonstrated that in the early relaxation process, the velocity distribution is non-Gaussian and q-Gaussian, since the system is in quasiequilibrium states (here q is the Tsallis entropic parameter). Thereafter, the velocity distribution undergoes higher non-Gaussian distributions, especially when the core forms rapidly in the collapse process; i.e., q tends to be larger than that for the quasiequilibrium state, since the velocity distribution further deviates from Gaussian. However, after the core forms sufficiently, the velocity distribution gradually relaxes toward a Gaussian-like distribution. Accordingly, the velocity distribution evolves from a non-Gaussian distribution through a higher non-Gaussian distribution to a Gaussian-like distribution; i.e., the velocity distribution does not monotonically relax toward a Gaussian-like distribution in our collapse simulations. We clearly show such a transition of the velocity distribution, based not only on the Tsallis entropic parameter but also on the ratio of velocity moments. We also find that a negative specific heat occurs in a collapse process with mass and energy loss (such as the escape of stars from globular clusters), even if the velocity distribution is Gaussian-like. © 2012 American Physical Society.","subitem_description_type":"Abstract"}]},"item_4_publisher_17":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"American Physical Society"}]},"item_4_relation_12":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1103/PhysRevE.85.021132","subitem_relation_type_select":"DOI"}}]},"item_4_rights_23":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"© 2012 American Physical Society."}]},"item_4_source_id_11":{"attribute_name":"NCID","attribute_value_mlt":[{"subitem_source_identifier":"AA11558033","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1539-3755","subitem_source_identifier_type":"ISSN"}]},"item_4_version_type_25":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Komatsu, Nobuyoshi"}],"nameIdentifiers":[{"nameIdentifier":"459","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"20436827","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=20436827"},{"nameIdentifier":"20436827","nameIdentifierScheme":"金沢大学研究者情報","nameIdentifierURI":"http://ridb.kanazawa-u.ac.jp/public/detail.php?kaken=20436827"},{"nameIdentifier":"20436827","nameIdentifierScheme":"研究者番号","nameIdentifierURI":"https://nrid.nii.ac.jp/nrid/1000020436827"}]},{"creatorNames":[{"creatorName":"Kiwata, Takahiro"}],"nameIdentifiers":[{"nameIdentifier":"1151","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"40255107","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=40255107"},{"nameIdentifier":"40255107","nameIdentifierScheme":"研究者番号","nameIdentifierURI":"https://nrid.nii.ac.jp/nrid/1000040255107"}]},{"creatorNames":[{"creatorName":"Kimura, Shigeo"}],"nameIdentifiers":[{"nameIdentifier":"10640","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"70272953","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=70272953"},{"nameIdentifier":"70272953","nameIdentifierScheme":"研究者番号","nameIdentifierURI":"https://nrid.nii.ac.jp/nrid/1000070272953"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-10-03"}],"displaytype":"detail","filename":"TE-PR-KOMATSU-N-21132.pdf","filesize":[{"value":"1.4 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"TE-PR-KOMATSU-N-21132.pdf","url":"https://kanazawa-u.repo.nii.ac.jp/record/8578/files/TE-PR-KOMATSU-N-21132.pdf"},"version_id":"65f4cf2e-7e28-4fdd-81ef-2c1d55af257e"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Transition of velocity distributions in collapsing self-gravitating N-body systems","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Transition of velocity distributions in collapsing self-gravitating N-body systems"}]},"item_type_id":"4","owner":"3","path":["936"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-10-03"},"publish_date":"2017-10-03","publish_status":"0","recid":"8578","relation_version_is_last":true,"title":["Transition of velocity distributions in collapsing self-gravitating N-body systems"],"weko_creator_id":"3","weko_shared_id":-1},"updated":"2024-06-20T06:25:47.495324+00:00"}