WEKO3
アイテム
Collective Instabilities of Self-Gravitating Systems
https://ir.soken.ac.jp/records/4262
https://ir.soken.ac.jp/records/42620a509c52-2c4a-4123-9d03-8cacaa34c916
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-02-19 | |||||
| タイトル | ||||||
| タイトル | Collective Instabilities of Self-Gravitating Systems | |||||
| タイトル | ||||||
| タイトル | Collective Instabilities of Self-Gravitating Systems | |||||
| 言語 | en | |||||
| 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_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
IKEUCHI, Satoru
× IKEUCHI, Satoru× NAKAMURA, Takashi× TAKAHARA, Fumio |
|||||
| 著者別名 |
池内, 了
× 池内, 了 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The instability modes of self-gravitating systems are investigated in comparison with electron oscillations in a plasma for following four cases; one system of a collisionless or a hydrodynamical description, two systems with a relative velocity of a collisionless and a hydrodynamical one, two collisionless ones and two hydrodynamical ones. The fundamental unstable mode is the Jeans instability but this mode is modified for coexistence of two systems as follows: The critical Jeans length becomes longer due to the stabilization effect of relative velocity. Moreover, when the relative velocity is higher than a certain value, each system becomes independently unstable for the Jeans mode and they appear as overstable modes. On the other hand, the Landau instability occurs only in the system of a collisionless and a hydrodynamical description in contrast with a plasma case, where the Landau mode appears in two-collisionless system as well. Then, the condition for the occurrence of the Landau mode is obtained as the existence of the distribution function with velocity dispersion and the repulsive force (or effect). It relation to the density wave theroy of spiral arms, the Landau growing mode in a stellar and gaseous system is discussed. |
|||||
| 書誌情報 |
Progress of Theoretical Physics en : Progress of Theoretical Physics 巻 52, 号 6, p. 1807-1818, 発行日 1974 |
|||||
| 出版者 | ||||||
| 出版者 | Oxford University Press | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0033-068X | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1143/PTP.52.1807 | |||||
| 関連名称 | 10.1143/PTP.52.1807 | |||||
| 権利 | ||||||
| 権利情報 | © 2014 The Physical Society of Japan | |||||
