利用日震获取修正重力场的精度约束
Obtaining Precision Constraints on Modified Gravity with Helioseismology
摘要：
我们提出日震学作为一种新的，精确的探测天体物理尺度的第五种力量，并将其应用于最一般的标量张量理论的暗能量，称为简并高阶标量张量理论（DHOST）。我们解释了太阳内部的第五种力的影响如何在声学振荡上留下可观察到的印记，并且在一定的假设下，我们数值计算了修改后的重力内的非径向脉动本征频率。我们说明了它的约束力表明，日震观测有可能提高约束的第五种力量的强度超过$2$数量级，作为$-1.8 \cdot 10^{-3} \leq Y \leq 1.2 \cdot 10^{-3}$（在$2σ$）。这反过来又暗示了在宇宙学背景（$α_{\text{H}}, β_{1}$）下，理论的自由函数也有类似的限制。
英文摘要：
We propose helioseismology as a new, precision probe of fifth forces at astrophysical scales, and apply it on the most general scalar-tensor theories for dark energy, known as Degenerate Higher-Order Scalar-Tensor theories (DHOST). We explain how the effect of the fifth force on the solar interior leaves an observable imprint on the acoustic oscillations, and under certain assumptions we numerically compute the non-radial pulsation eigenfrequencies within modified gravity. We illustrate its constraining power by showing that helioseismic observations have the potential to improve constraints on the strength of the fifth force by more than $2$ orders of magnitude, as $-1.8 \cdot 10^{-3} \leq Y \leq 1.2 \cdot 10^{-3}$ (at $2σ$). This in turn would suggest constraints of similar order for the theory's free functions around a cosmological background ($α_{\text{H}}, β_{1}$).
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