| タイトル | Subcritical dispersive shock waves upstream of planetary bow shocks and at Comet Giacobini-Zinner |
| 著者（英） | Winske, D.; Omidi, N. |
| 著者所属（英） | Los Alamos National Lab.|California Univ. |
| 発行日 | 1988-10-01 |
| 言語 | eng |
| 内容記述 | The nonlinear evolution of ULF (magnetosonic) waves is studied using electromagnetic simulations. The waves were observed upstream of the planetary bow shocks at Comet Giacobini-Zinner. It is shown that as ULF waves generated by the resonant ion beam instability steepen, their polarization becomes linear. A high-frequency wave packet is generated by the steepening process. The steepened wave has a structure and a behavior similar to a subcritical dispersive shock. It is suggested that Comet Giacobini-Zinner did not have a single bow shock. It is concluded that the comet had a transition region consisting of a series of shocks which were convected by the solar wind. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 89A13971 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/367164 |
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