标题： 用CMB和SNIa数据约束标量场的演化 显示英文标题

标题： Constraining Evolution of Quintessence with CMB and SNIa Data

摘要： 假设的暗能量组分的状态方程可能与宇宙临界密度的三分之二不同，这可能与宇宙学常数的状态方程有很大差异。 采用一种现象学模型，我们半解析地研究了超新星观测以及从最近的CMB数据中提取的声学尺度对标量快宙子施加的约束。 我们表明，一个在黑暗时代由快宙子主导的宇宙与当前的观测约束是一致的。 显示英文摘要

摘要： The equation of state of the hypothetical dark energy component, which constitutes about two thirds of the critical density of the universe, may be very different from that of a cosmological constant. Employing a phenomenological model, we investigate semi-analytically the constraints imposed on the scalar quintessence by supernovae observations, and by the acoustic scale extracted from recent CMB data. We show that a universe with a quintessence-dominated phase in the dark age is consistent with the current observational constraints.