磁性Ap星光谱中不完全帕邢-巴克效应的模拟
Modelling the incomplete Paschen-Back effect in the spectra of magnetic Ap stars
摘要：
我们提出的第一个系统的调查结果的不完整的Paschen-Back效应在磁性Ap星。简要概述的理论，其次是演示如何水平分裂和组件的强度与磁场强度的变化，为一些特殊的天体物理学利益的线。要求列出了一个代码，它允许计算全斯托克斯光谱的Paschen-Back制度和行为的斯托克斯I和V配置文件中的多重态74的Fe II的过渡进行了一些详细的讨论。结果表明，不完全的Paschen-Back效应会导致明显的谱线位移，这种位移强烈地依赖于总多重态强度、磁场强度和磁场方向。鬼成分（违反了J的正常选择规则）出现在强磁场中，但可能无法观察到。最后，它示出的综合磁场模量$H_s$的测量没有受到不利影响的Paschen-Back效应，并有一个潜在的问题（磁）多普勒映射，如果线在Paschen-Back制度中的塞曼近似处理。
英文摘要：
We present first results of a systematic investigation of the incomplete Paschen-Back effect in magnetic Ap stars. A short overview of the theory is followed by a demonstration of how level splittings and component strengths change with magnetic field strength for some lines of special astrophysical interest. Requirements are set out for a code which allows the calculation of full Stokes spectra in the Paschen-Back regime and the behaviour of Stokes I and V profiles of transitions in the multiplet 74 of FeII is discussed in some detail. It is shown that the incomplete Paschen-Back effect can lead to noticeable line shifts which strongly depend on total multiplet strength, magnetic field strength and field direction. Ghost components (which violate the normal selection rule on J) show up in strong magnetic fields but are probably unobservable. Finally it is shown that measurements of the integrated magnetic field modulus $H_s$ are not adversely affected by the Paschen-Back effect, and that there is a potential problem in (magnetic) Doppler mapping if lines in the Paschen-Back regime are treated in the Zeeman approximation.
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