标题： 空洞作为暗能量的精确探针 显示英文标题

标题： Voids as a Precision Probe of Dark Energy

摘要： 暗能量状态方程的特征可能在空洞的形状上被观测到。 我们估计了从未来已计划用于研究大尺度结构的光谱巡天中，由空洞椭圆度分布确定的宇宙学参数约束。 这些约束来源于椭圆度分布对宇宙学参数的敏感性，这种敏感性通过在某个长度尺度上平滑后的密度场涨落方差来体现。 这个长度尺度可以选择为非常早期时的空洞共动半径的量级，此时涨落呈高斯分布。 我们使用Fisher估计表明，由空洞椭圆度得出的约束是有前景的。 将这些约束与其他传统方法结合，可使未来实验中暗能量参数的Dark Energy Task Force优值图提高一个数量级。 这些未来约束的估计取决于多个系统性问题，这些问题需要进一步利用模拟研究。 我们概述了这些问题，并研究了某些观测和理论系统性对暗能量参数预测约束的影响。 显示英文摘要

摘要： A signature of the dark energy equation of state may be observed in the shape of voids. We estimate the constraints on cosmological parameters that would be determined from the ellipticity distribution of voids from future spectroscopic surveys already planned for the study of large scale structure. The constraints stem from the sensitivity of the distribution of ellipticity to the cosmological parameters through the variance of fluctuations of the density field smoothed at some length scale. This length scale can be chosen to be of the order of the comoving radii of voids at very early times when the fluctuations are Gaussian distributed. We use Fisher estimates to show that the constraints from void ellipticities are promising. Combining these constraints with other traditional methods results in the improvement of the Dark Energy Task Force Figure of Merit on the dark energy parameters by an order of hundred for future experiments. The estimates of these future constraints depend on a number of systematic issues which require further study using simulations. We outline these issues and study the impact of certain observational and theoretical systematics on the forecasted constraints on dark energy parameters.