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  1. 010 学術雑誌論文
  2. 池内, 了 / IKEUCHI, Satoru

Nonlinear Modulation of Density Wave in Self-Gravitating Systems

https://ir.soken.ac.jp/records/4254
https://ir.soken.ac.jp/records/4254
7420d565-97fd-407f-ae2a-ab1be1a2eb47
Item type 学術雑誌論文 / Journal Article(1)
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

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IKEUCHI, Satoru

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NAKAMURA, Takashi

× NAKAMURA, Takashi

NAKAMURA, Takashi

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著者別名 池内, 了

× 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.
書誌情報 Progress of Theoretical Physics
en : Progress of Theoretical Physics

巻 55, 号 5, p. 1419-1431, 発行日 1976
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
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