用宇宙空洞约束暗能量状态方程
Constraining the Dark Energy Equation of State with Cosmic Voids
摘要：
我们的宇宙被观察到由于负压力的主导暗能量而加速。暗能量状态方程（w）是理解宇宙最终命运的关键。宇宙空洞的行为就像宇宙中的气泡，因此它们的形状对背景宇宙学非常敏感。假设宇宙是平坦的，利用宇宙中物质密度参数（Omega_m）和无量纲哈勃参数（h）的先验知识，我们解析地证明了宇宙空洞的椭圆率演化可能是探测暗能量状态方程的一个灵敏探针.我们还讨论了w和Omega_m之间的参数简并性。
英文摘要：
Our universe is observed to be accelerating due to the dominant dark energy with negative pressure. The dark energy equation of state (w) holds a key to understanding the ultimate fate of the universe. The cosmic voids behave like bubbles in the universe so that their shapes must be quite sensitive to the background cosmology. Assuming a flat universe and using the priors on the matter density parameter (Omega_m) and the dimensionless Hubble parameter (h), we demonstrate analytically that the ellipticity evolution of cosmic voids may be a sensitive probe of the dark energy equation of state. We also discuss the parameter degeneracy between w and Omega_m.
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