论文标题
磁层压缩对Jovian无线电排放的影响：使用Juno数据的原位案例研究
Effect of a magnetosphere compression on Jovian radio emissions: in situ case study using Juno data
论文作者
论文摘要
在木星周围的53天极地轨道上，朱诺经常越过Jovian磁层的边界（即磁磁带和弓形冲击）。从边界位置，可以推断出上游太阳风动压力，这又说明了系统的压缩或放松状态。这项研究的目的是检查磁层压缩过程中的Jovian无线电发射，以确定太阳风与Jovian无线电排放之间的关系。在本文中，我们列出了弓形冲击和磁性杂交（从2016年6月至2022年8月），以及一些额外的信息（例如，从Joy等人（2002年）推断出的隔距离距离的太阳能风力动态压力和僵局位置）。然后，我们选择了连续发生的两个压缩事件（从磁笼杂交中推断出），并提出了关于Jovian无线电排放的响应的案例研究。我们证明磁层压缩导致新无线电源的激活。几乎同时观察到新激活的宽带千层排放量与磁层的压缩，源涵盖了各种纵向。仅在特定的纵向和杜斯克当地，deTametric发射源被激活多次旋转。最后，在压缩阶段没有观察到窄带基尔辐射的激活，而是当磁层处于其膨胀阶段时。
During its 53-day polar orbit around Jupiter, Juno often crosses the boundaries of the Jovian magnetosphere (namely the magnetopause and bow shock). From the boundary locations, the upstream solar wind dynamic pressure can be inferred, which in turn illustrates the state of compression or relaxation of the system. The aim of this study is to examine Jovian radio emissions during magnetospheric compressions, in order to determine the relationship between the solar wind and Jovian radio emissions. In this paper, we give a complete list of bow shock and magnetopause crossings (from June 2016 to August 2022), along with some extra informations (e.g. solar wind dynamic pressure and position of the standoff distances inferred from Joy et al. (2002)). We then select two compression events that occur in succession (inferred from magnetopause crossings) and we present a case study of the response of the Jovian radio emissions. We demonstrate that magnetospheric compressions lead to the activation of new radio sources. Newly activated broadband kilometric emissions are observed almost simultaneously to compression of the magnetosphere, with sources covering a large range of longitudes. Decametric emission sources are seen to be activated more than one rotation later only at specific longitudes and dusk local times. Finally, the activation of narrowband kilometric radiation is not observed during the compression phase, but when the magnetosphere is in its expansion phase.
