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Universal non-Gaussian velocity distribution in violent gravitational processes
http://hdl.handle.net/10098/6413
http://hdl.handle.net/10098/64138f82c721-aa46-4744-b15b-11f601ef85bf
名前 / ファイル | ライセンス | アクション |
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Phys.Rev.E71_2005_.pdf (192.6 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2012-08-01 | |||||
タイトル | ||||||
タイトル | Universal non-Gaussian velocity distribution in violent gravitational processes | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_1843 | |||||
資源タイプ | other | |||||
著者 |
IGUCHI, Osamu
× IGUCHI, Osamu× TAKEKAWA, Takayuki× NAKAMICHI, Akira× MORIKAWA, Masahiro |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We study the velocity distribution in spherical collapses and cluster-pair collisions by use of N-body simulations. Reflecting the violent gravitational processes, the velocity distribution of the resultant quasistationary state generally becomes non-Gaussian. Through the strong mixing of the violent process, there appears a universal non-Gaussian velocity distribution, which is a democratic (equal-weighted) superposition of many Gaussian distributions (DT distribution). This is deeply related with the local virial equilibrium and the linear mass-temperature relation which characterize the system. We show the robustness of this distribution function against various initial conditions which leads to the violent gravitational process. The DT distribution has a positive correlation with the energy fluctuation of the system. On the other hand, the coherent motion such as the radial motion in the spherical collapse and the rotation with the angular momentum suppress the appearance of the DT distribution | |||||
書誌情報 |
Physical review. Third series. E 巻 71, p. 16102, 発行日 2005-01 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 15393755 | |||||
書誌レコードID | ||||||
識別子タイプ | NCID | |||||
関連識別子 | TD00000549 | |||||
著者版フラグ | ||||||
出版タイプ | AO | |||||
出版タイプResource | http://purl.org/coar/version/c_b1a7d7d4d402bcce |