论文标题
从阳光传播的光环电子推断出的气层双极电位
The Heliospheric Ambipolar Potential Inferred from Sunward-Propagating Halo Electrons
论文作者
论文摘要
我们提供的证据表明，太阳风电子光环分布的一半的阳光传播不在内部地球层中散射而演变。我们假设颗粒保留了它们的总能量和磁矩，并对由Parker太阳能探针Span-E仪器测量的电子倾斜角度分布执行“ Liouville映射”。即，我们表明，如果选择了适当的星际潜力，则分布与Liouville定理一致。将这种潜力是我们拟合方法的结果，与质子大量流量能的径向曲线进行了比较。我们发现，推断的电势造成了近100％的质子加速度在太阳风中以heliipentric距离为0.18-0.79 au。这些观察结果结合在一起形成了一致的物理图：相同的星际潜在潜力解释了太阳风质子的加速度以及电子晕圈的演变。在这张照片中，光环是由一个尚未尚未尚未始终的机制源自外部地球层中某个地方的阳光传播人群形成的。
We provide evidence that the sunward-propagating half of the solar wind electron halo distribution evolves without scattering in the inner heliosphere. We assume the particles conserve their total energy and magnetic moment, and perform a "Liouville mapping" on electron pitch angle distributions measured by the Parker Solar Probe SPAN-E instrument. Namely, we show that the distributions are consistent with Liouville's theorem if an appropriate interplanetary potential is chosen. This potential, an outcome of our fitting method, is compared against the radial profiles of proton bulk flow energy. We find that the inferred potential is responsible for nearly 100% of the proton acceleration in the solar wind at heliocentric distances 0.18-0.79 AU. These observations combine to form a coherent physical picture: the same interplanetary potential accounts for the acceleration of the solar wind protons as well as the evolution of the electron halo. In this picture the halo is formed from a sunward-propagating population that originates somewhere in the outer heliosphere by a yet-unknown mechanism.
