论文标题
相对论流出的辐射冷却的数值方法
A numerical approach for radiative cooling in relativistic outflows
论文作者
论文摘要
在高能量天体物理学的场景中，例如大麻，grbs或pwne，极有可能通过散射在环境中与光子相互作用。只要粒子的能量大于相互作用光子的能量，（经典）散射就在汤姆森（Thomson）方向上。否则，量子效应将影响散射横截面，我们进入所谓的Klein-Nishina制度。众所周知，汤森制度中的辐射冷却非常有效，导致柔软的高能光谱。但是，观察结果表明，在许多情况下，某些物体的高能谱很难。这导致人们认为粒子可能没有被有效冷却。在过去的几十年中，已经制定了克莱因 - 尼希纳（Klein-Nishina）制度的渐近近似值，以说明这些校正在负责观察到的高能源光谱的粒子的分布中。在这项工作中，我们向辐射冷却介绍了klein-nishina校正的数值方法。它已经开发出来，以模拟通过反康普顿散射与周围环境中光子相互作用的颗粒分布的演变。
In high energy astrophysics scenarios such as blazars, GRBs or PWNe, it is highly probable that ultra-relativistic particles interact with photons in their environment through scattering. As long as the energy of the particle is greater than the energy of the interacting photon, the (classical) scattering is known to be in the Thomson regime. Otherwise, quantum effects will affect the scattering cross section, and we enter into the so-called Klein-Nishina regime. It is well known that radiative cooling in the Thomson regime is very efficient, leading to soft high-energy spectra. However, observations have shown that, in many cases, the high energy spectrum of some objects is rather hard. This has led to think that maybe particles are not being cooled down efficiently. Asymptotic approximations of the Klein-Nishina regime have been formulated in the last decades in order to account for these corrections in the distribution of particles responsible for the observed spectrum of high energy sources. In this work we presenta a numerical approach of the Klein-Nishina corrections to the radiative cooling. It has been developed to simulate the evolution of a distribution of particles interacting with photons in their surroundings via inverse Compton scattering.
