Loisel G P, Bailey J E, Liedahl D A, Fontes C J, Kallman T R, Nagayama T, Hansen S B, Rochau G A, Mancini R C, Lee R W
Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.
Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Phys Rev Lett. 2017 Aug 18;119(7):075001. doi: 10.1103/PhysRevLett.119.075001. Epub 2017 Aug 16.
The interpretation of x-ray spectra emerging from x-ray binaries and active galactic nuclei accreted plasmas relies on complex physical models for radiation generation and transport in photoionized plasmas. These models have not been sufficiently experimentally validated. We have developed a highly reproducible benchmark experiment to study spectrum formation from a photoionized silicon plasma in a regime comparable to astrophysical plasmas. Ionization predictions are higher than inferred from measured absorption spectra. Self-emission measured at adjustable column densities tests radiation transport effects, demonstrating that the resonant Auger destruction assumption used to interpret black hole accretion spectra is inaccurate.
对来自X射线双星和活跃星系核吸积等离子体的X射线光谱的解释依赖于用于光电离等离子体中辐射产生和传输的复杂物理模型。这些模型尚未得到充分的实验验证。我们开发了一个高度可重复的基准实验，以研究在与天体物理等离子体相当的条件下光电离硅等离子体的光谱形成。电离预测高于从测量的吸收光谱推断的值。在可调柱密度下测量的自发射测试了辐射传输效应，表明用于解释黑洞吸积光谱的共振俄歇破坏假设是不准确的。
