Benchmarked atomic data for astrophysics
Benchmarked atomic data for astrophysics
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DOI：
10.1017/s1743921319008329
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
G. del Zanna
中科院分区：
文献类型：
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作者：
G. del Zanna
本文评述了近年来天体物理学中感兴趣的离子的原子数据计算，重点介绍了剑桥的工作。计算结果已对高分辨率实验室和天体物理光谱进行了基准测试。还制定了一个评估原子数据不确定性的框架。预测谱线强度长期存在的差异已经得到解决，日冕离子中的大量能级最终得到确认，从而改进了极紫外和软X射线谱区的建模。最近的改进碰撞辐射模型的基础上。它们与X射线中卫星线的建模和解决恒星大气中色球-日冕过渡的长期问题有关。
Abstract The recent calculations of atomic data for ions of astrophysical interest are reviewed with a focus on work performed in Cambridge. The calculations have been benchmarked against high-resolution laboratory and astrophysical spectra. A framework for assessing uncertainties in atomic data has also been developed. Long-standing discrepancies in predicted spectral line intensities have been resolved, and a significant number of levels in coronal ions have finally been identified, improving the modelling of the extreme-ultraviolet and soft X-ray spectral regions. Recent improvements based on collisional-radiative modelling are presented. They are relevant for the modelling of satellite lines in the X-rays and for solving the long-standing problems in the chromosphere-corona transition in stellar atmospheres.