论文标题
Ganymede MHD型号：Juno PJ34 Flyby的磁层上下文
Ganymede MHD Model: Magnetospheric Context for Juno's PJ34 Flyby
论文作者
论文摘要
2021年6月7日，Juno航天器访问了Ganymede，并提供了自2000年Galileo最后一次Flyby以来的第一个原位观测。沿一维轨迹获得的测量值可以借助三维磁层模型将其带入全球环境中。在这里，我们采用了Duling等人的磁性水力学模型。 （2014年）在朱诺·弗莱比期间的条件。除了等离子体变量的全球分布外，我们还提供了Juno沿磁场线的位置的映射，Juno与封闭场线的距离以及有关磁场拓扑的详细信息。我们发现Juno没有进入封闭的野外线区域，并且表面上的开放式和闭合场之间的边界与观察到的极光椭圆形的极点边缘匹配。为了估计模型结果的灵敏度，我们进行了一项具有不同上游血浆条件和其他模型参数的参数研究。
On June 7th, 2021 the Juno spacecraft visited Ganymede and provided the first in situ observations since Galileo's last flyby in 2000. The measurements obtained along a one-dimensional trajectory can be brought into global context with the help of three-dimensional magnetospheric models. Here we apply the magnetohydrodynamic model of Duling et al. (2014) to conditions during the Juno flyby. In addition to the global distribution of plasma variables we provide mapping of Juno's position along magnetic field lines, Juno's distance from closed field lines and detailed information about the magnetic field's topology. We find that Juno did not enter the closed field line region and that the boundary between open and closed field lines on the surface matches the poleward edges of the observed auroral ovals. To estimate the sensitivity of the model results, we carry out a parameter study with different upstream plasma conditions and other model parameters.
