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Nonlinear Modulation of Density Wave in Self-Gravitating Systems
https://ir.soken.ac.jp/records/4254
https://ir.soken.ac.jp/records/42547420d565-97fd-407f-ae2a-ab1be1a2eb47
| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||
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| 公開日 | 2014-02-18 | |||||||||
| タイトル | ||||||||||
| タイトル | Nonlinear Modulation of Density Wave in Self-Gravitating Systems | |||||||||
| タイトル | ||||||||||
| タイトル | Nonlinear Modulation of Density Wave in 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
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| 著者別名 |
池内, 了
× 池内, 了
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| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | Nonlinear modulation of density wave in self-gravitating systems is studied by the reductive perturbation method. Using gas dynamical equations, an infinitely long rotating cylinder and an infinitesimally thin disk are considered. In the former system, both one-dimensional and two-dimensional modulations, the so-called self-focusing, are found to be stable for all wave number when the carrier wave propagates perpendicularly to rotational axis. In the latter system, amplitude modulation becomes unstable for large wave number. This unstable amplitude modulation grows to the envelope solitary wave in a time of the order of rotational one even if the amplitude of carrier wave is as low as one hundredth of zeroth order quantity. It is concluded that nonlinear effects cannot be neglected in the density wave theory of spiral arms. The conjecture is proposed that this nonlinear modulationally unstable mode can be identified with the spiral arms of S-type galaxies. |
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| 書誌情報 |
Progress of Theoretical Physics en : Progress of Theoretical Physics 巻 55, 号 5, p. 1419-1431, 発行日 1976 |
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| 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.55.1419 | |||||||||
| 関連名称 | 10.1143/PTP.55.1419 | |||||||||
| 権利 | ||||||||||
| 権利情報 | © 2014 The Physical Society of Japan | |||||||||
