论文标题
深色能源的广义追踪器典型模型
Generalized tracker quintessence models for dark energy
论文作者
论文摘要
我们使用其相应电位的一般参数化研究了跟踪器典型模型的动力学特性，并表明在早期出现跟踪器行为存在一般条件。同样，我们确定了典型跟踪器模型还可以提供宇宙的加速扩展的条件，其状态方程接近$ -1 $。除了对背景动力学的分析外，我们还以一致的方式包括了挑选场的线性密度扰动，并使用相同的势参数化，我们通过这些参数对它们对某些宇宙学可观察的影响产生的影响。将广义跟踪器模型与观察结果进行了比较，我们讨论了它们的适当性，以改善初始条件的微调及其与后期宇宙加速扩张的一致性。
We study the dynamical properties of tracker quintessence models using a general parametrization of their corresponding potentials, and show that there is a general condition for the appearance of a tracker behavior at early times. Likewise, we determine the conditions under which the quintessence tracker models can also provide an accelerating expansion of the universe with an equation of state closer to $-1$. Apart from the analysis of the background dynamics, we also include linear density perturbations of the quintessence field in a consistent manner and using the same parametrization of the potential, with which we show the influence they have on some cosmological observables. The generalized tracker models are compared to observations, and we discuss their appropriateness to ameliorate the fine-tuning of initial conditions and their consistency with the accelerated expansion of the Universe at late times.
