| タイトル | The fine structure of the Saturnian ring system |
| 著者（英） | Houpis, H. L. F.; Mendis, D. A. |
| 著者所属（英） | California Univ. |
| 発行日 | 1983-08-01 |
| 言語 | eng |
| 内容記述 | A dust disk within a planetary magnetosphere constitutes a novel type of dust-ring current. Such an azimuthal current carrying dust disk is subject to the dusty plasma analog of the well known finite-resistivity 'tearing' mode instability in regular plasma current sheets, at long wavelengths. It is proposed that the presently observed fine ringlet of the Saturnian ring system is a relic of this process operating at cosmogonic times and breaking up the initial proto-ring (which may be regarded as an admixture of fine dust and plasma) into an ensemble of thin ringlets. It is shown that this instability develops at a rate that is many orders of magnitude faster than any other known instability, when the disk thickness reaches a value that is comparable to its present observed value. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 84A11547 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/400917 |
