Searching for variations in dimensionless physical constants presents a meaningful characteristic in experimental and observational studies. One of the most valuable explorations of these variations could depend on the evolution of white dwarf stars. By analyzing the spectrum of the white dwarf star G191-B2B, we derive a robust limit on the cosmological variation of the gravitational constant: \(\dot{\mathrm{G}}/\mathrm{G}=(0.238\pm 2.959)\times {10}^{-15}{\mathrm{yr}}^{-1}\). This limit proposes a potential test of the framework of modern unification theories.

中文翻译：

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使用强引力场寻找引力常数的长期变化

寻找无量纲物理常数的变化在实验和观察研究中呈现出有意义的特征。对这些变化最有价值的探索之一可能取决于白矮星的演化。通过分析白矮星G191-B2B的光谱，我们得出了引力常数的宇宙学变化的稳健极限： \(\ dot{\mathrm{G}}/\mathrm{G}=(0.238\pm 2.959 )\times {10}^{-15}{\mathrm{yr}}^{-1}\)。这一限制提出了对现代统一理论框架的潜在考验。