Spoke formation under moving plasma clouds
Spoke formation under moving plasma clouds
复制标题
移动等离子云下的辐条形成
DOI：
10.1016/j.icarus.2005.07.025
复制
发表时间：
2005
期刊：
影响因子：
3.2
通讯作者：
P. Goldreich
中科院分区：
文献类型：
--
作者：
A. Farmer;P. Goldreich
Goertz 和 Morfill [Goertz, C.K., Morfill, G., 1988. Icarus 53, 219–229] 提出土星环上的辐条是在流星体撞击产生的径向移动等离子体云下形成的。我们证明，等离子体云相对于环材料移动的速度受到开普勒速度和共转速度之间的差异的限制。新辐条的径向定向要求径向速度至少比该上限大一个数量级，因此Goertz和Morfill提出的模型无法制造径向辐条。
Goertz and Morfill [Goertz, C.K., Morfill, G., 1988. Icarus 53, 219–229] propose that spokes on Saturn's rings form under radially moving plasma clouds produced by meteoroid impacts. We demonstrate that the speed at which a plasma cloud can move relative to the ring material is bounded from above by the difference between the Keplerian and corotation velocities. The radial orientation of new spokes requires radial speeds that are at least an order of magnitude larger than this upper limit, thus the model advanced by Goertz and Morfill fails to make radial spokes.