论文标题
星际吸收和灰尘散射
Interstellar absorption and dust scattering
论文作者
论文摘要
随着X射线观测值XMM-Newton和Chandra的出现，X射线中星际介质（ISM）的研究进入了黄金时代。高能分辨率允许研究尘埃光谱特征，并具有前所未有的细节。同时，X射线成像功能提供了尘埃散射光环的新视角。光谱和成像都取决于简单的几何形状，在该几何形状中，远处的X射线源通常是明亮的X射线二进制系统，位于多层ISM后面。 X射线二进制文件可以在银河系的不同地区找到，从而为在不同环境中研究ISM提供了独特的机会。在下文中，我们将描述如何将X射线用作沿视线研究气体和灰尘的工具，从而揭示元素丰度和耗尽。星际尘埃光谱和成像特征的研究可用于提取灰尘的化学和物理特性及其沿视线的分布。
The study of the interstellar medium (ISM) in the X-rays has entered a golden age with the advent of the X-ray observatories XMM-Newton and Chandra. High-energy resolution allowed to study dust spectroscopic features with unprecedented detail. At the same time, the X-ray imaging capabilities offered a new perspective of dust scattering halos. Both spectroscopy and imaging rely on a simple geometry, where a distant X-ray source, usually a bright X-ray binary system, lies behind a multi-layered ISM. X-ray binaries can be found in different regions in the Galaxy, providing the unique chance to study the ISM in distinct environments. In the following we will describe how X-rays can be used as a tool to study gas and dust along the line of sight, revealing elemental abundances and depletion. The study of interstellar dust spectroscopic and imaging features can be used to extract the chemical and physical properties of the intervening dust, as well as its distribution along the line of sight.
