论文标题
宇宙射线对流扩散各向异性
Cosmic-Ray Convection-Diffusion Anisotropy
论文作者
论文摘要
在不均匀的对流下，扩散颗粒的分布分别表现出偶极子和四极各向异性，分别由流体惯性和剪切力诱导。这些与对流相关的各向异性与康普顿的效应不同，通常随宇宙射线（CR）能量而增加，因此是CR各向异性的候选贡献者。考虑到惯性效应，CR观测数据可用于设置赤道平面中局部星际介质的平均加速度的上限，以达到100 $μ\ text {m}/\ text {m}/\ text {s}^2 $。使用OORT常数，可以用超过200 TEV的四极各向异性建模，其剪切效应是由银河差旋转引起的。
Under nonuniform convection, the distribution of diffusive particles can exhibit dipole and quadrupole anisotropy induced by the fluid inertial and shear force, respectively. These convection-related anisotropies, unlike the Compton-Getting effect, typically increase with the cosmic-ray (CR) energy, and are thus candidate contributors for the CR anisotropy. In consideration of the inertial effect, CR observational data can be used to set an upper limit on the average acceleration of the local interstellar medium in the equatorial plane to be on the order of 100 $ μ\text{m}/\text{s}^2 $. Using Oort constants, the quadrupole anisotropy above 200 TeV may be modeled with the shear effect arising from the Galactic differential rotation.
