We examine the class of barotropic fluid models of dark energy, in which the pressure is an explicit function of the density, p=f(rho). Through general physical considerations we constrain the asymptotic past and future behaviors and show that this class is equivalent to the sum of a cosmological constant and a decelerating perfect fluid, or aether, with w(AE)>= 0. Barotropic models give substantially disjoint predictions from quintessence, except in the limit of Lambda CDM. They are also interesting in that they simultaneously can ameliorate the coincidence problem and yet predict a value of w approximate to-1.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据