论文标题
各向异性扩散无法解释TEV HALO观察
Anisotropic diffusion cannot explain TeV halo observations
论文作者
论文摘要
TEV光环是脉冲星周围光子发射率增强的区域。尽管已经发现了多种来源，但由于难以限制高能电子和星际介质的20个PC区域内的高能电子和正电子的困难，因此对它们的径向轮廓和球形形态的自洽解释仍然难以捉摸。一种提出的解决方案利用各向异性扩散将电子种群限制在沿视线的“管”中。在这项工作中，我们表明，尽管这种模型可以解释诸如Geminga之类的独特来源，但这种解决方案的相空间很小，他们无法同时解释TEV Halo种群的大小和近似径向对称性。
TeV halos are regions of enhanced photon emissivity surrounding pulsars. While multiple sources have been discovered, a self-consistent explanation of their radial profile and spherically-symmetric morphology remains elusive due to the difficulty in confining high-energy electrons and positrons within ~20 pc regions of the interstellar medium. One proposed solution utilizes anisotropic diffusion to confine the electron population within a "tube" that is auspiciously oriented along the line of sight. In this work, we show that while such models may explain a unique source such as Geminga, the phase space of such solutions is very small and they are unable to simultaneously explain the size and approximate radial symmetry of the TeV halo population.
