标题： 日球层中诱导的电荷交换X射线的偏振 显示英文标题

标题： Polarization of the charge-exchange X-rays induced in the Heliosphere

摘要： 我们报告了对完全剥离的太阳风离子 C$^{6+}$和 O$^{8+}$与日球层氢原子发生电荷交换碰撞诱导出的 X 射线发射偏振的理论研究结果。 已经计算了沿黄道面视线方向观测到的 X 射线发射偏振，作为太阳风离子速度的函数，包括慢速和快速太阳风以及日冕物质抛射所对应的范围内的速度。为了确定日球层 X 射线发射偏振的变化性，在太阳活动极小期条件下使用自洽的太阳风等离子体和日球层气体参数计算了偏振，并将其与平均太阳活动条件下计算的偏振进行了比较。 我们预测电荷交换 X 射线的偏振将在 3% 到 8% 之间变化，这取决于视线几何形状、太阳风离子速度以及所选择的发射线。 显示英文摘要

摘要： We report results of a theoretical investigation of polarization of the X-ray emissions induced in charge-exchange collisions of fully stripped solar wind ions C$^{6+}$ and O$^{8+}$ with the heliospheric hydrogen atoms. The polarization of X-ray emissions has been computed for line-of-sight observations within the ecliptic plane as a function of solar wind ion velocities, including a range of velocities corresponding to the slow and fast solar wind, and Coronal Mass Ejections. To determine the variability of polarization of heliospheric X-ray emissions, the polarization has been computed for solar minimum conditions with self-consistent parameters of the solar wind plasma and heliospheric gas and compared with the polarization calculated for an averaged solar activity. We predict the polarization of charge-exchange X-rays to be between 3% and 8%, depending on the line-of-sight geometry, solar wind ion velocity, and the selected emission lines.