自然常数与强引力场耦合吗？
Do the constants of nature couple to strong gravitational fields?
摘要：
最近，白矮星在基础物理学界有了新的用途。许多关于自然界基本相互作用的未来理论允许传统常数，如精细结构常数$α$，以某种方式变化。Berengut等人（2013年）的一项研究使用Preval等人（2013年）对热DA白矮星G191-B2 B进行的Fe/Ni V线测量，试图检测$α$的任何变化。发现Fe V线指示增加的α，而Ni V线指示减小的α。对此的可能解释可能是线的错误识别、不准确的原子数据或光谱中的波长依赖性失真。我们通过使用来自热sdO BD+28 $^{\circ}$ 4211的高S/N参考光谱来校准Fe/Ni V原子数据来检查前两种情况。利用这些新数据，我们重新评估了Berengut等人（2013）的工作，以推导出引力场中α变化的新约束。
英文摘要：
Recently, white dwarf stars have found a new use in the fundamental physics community. Many prospective theories of the fundamental interactions of Nature allow traditional constants, like the fine structure constant $α$, to vary in some way. A study by Berengut et al. (2013) used the Fe/Ni V line measurements made by Preval et al. (2013) from the hot DA white dwarf G191-B2B, in an attempt to detect any variation in $α$. It was found that the Fe V lines indicated an increasing alpha, whereas the Ni V lines indicated a decreasing alpha. Possible explanations for this could be misidentification of the lines, inaccurate atomic data, or wavelength dependent distortion in the spectrum. We examine the first two cases by using a high S/N reference spectrum from the hot sdO BD+28$^{\circ}$4211 to calibrate the Fe/Ni V atomic data. With this new data, we re-evaluate the work of Berengut et al. (2013) to derive a new constraint on the variation of alpha in a gravitational field.
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