Abstract. We tackle the Io's aurora source and topology by carrying out a set of global hybrid simulations of Io's interaction with the plasma torus under different model geometry and background conditions. Based on the simulated results, we compute the photon emission rates above the Io's surface and present the resulting images from a virtual telescope and topological maps showing the distribution of the emission sources across the moon's surface. This allows us to compare the structure of the aurora with the real observations and conclude on the different assumptions. We found a reasonable agreement with the real observations in the case of non-collisional background electron populations. From the comparison of the local magnetic field topology with model aurora structures, we also infer that an induced dipole feature is more probable to play a role in the interaction of Io with the Jovian magnetosphere. In addition we also examine the potential contribution of energetic electron beams, being observed in the Io's wake region, to the overall auroral emissions.

中文翻译：

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通过全球混合等离子体模拟获得Io的极光发射

摘要。我们通过在不同的模型几何和背景条件下对Io与等离子圆环的相互作用进行一组全局混合仿真，来解决Io的极光源和拓扑。根据模拟结果，我们计算出Io表面上方的光子发射速率，并显示来自虚拟望远镜和拓扑图的结果图像，这些拓扑图显示了整个月球表面的发射源分布。这使我们可以将极光的结构与实际观测结果进行比较，并得出不同的假设。我们发现，在非碰撞背景电子种群的情况下，与真实观测结果存在合理的一致性。通过将局部磁场拓扑与极光模型结构进行比较，我们还推断出感应偶极子特征更有可能在Io与木星磁层的相互作用中发挥作用。此外，我们还研究了在艾欧尾流地区观察到的高能电子束对整体极光发射的潜在贡献。