未来大冻结奇点的天文学界限
Astronomical bounds on future big freeze singularity
摘要：
最近人们发现，以幻影广义查伯金气体形式存在的暗能量可能导致宇宙末日的一种新形式--大冻结奇点。与大撕裂奇点一样，大冻结奇点也会发生在有限的未来宇宙时间，但与大撕裂奇点不同的是，它发生在有限的标度因子下。我们的目标是检验一个充满幻影广义Chaubergin气体的宇宙是否符合天文观测数据。我们将看到，如果宇宙只充满了广义的幻影Chaubergin气体，状态方程$p=-c^2s^2/ρ^α$与$α<-1$，那么这样的模型不能与天文观测数据相匹配。为了构建匹配的模型，实际上需要添加暗物质。这一过程导致宇宙学的情况下，不矛盾的天文观测数据，并允许一个估计多久，我们现在从未来的大冻结世界末日。
英文摘要：
Recently it was found that dark energy in the form of phantom generalized Chaplygin gas may lead to a new form of the cosmic doomsday, the big freeze singularity. Like the big rip singularity, the big freeze singularity would also take place at a finite future cosmic time, but unlike the big rip singularity it happens for a finite scale factor.Our goal is to test if a universe filled with phantom generalized Chaplygin gas can conform to the data of astronomical observations. We shall see that if the universe is only filled with generalized phantom Chaplygin gas with equation of state $p=-c^2s^2/ρ^α$ with $α<-1$, then such a model cannot be matched to the data of astronomical observations. To construct matched models one actually need to add dark matter. This procedure results in cosmological scenarios which do not contradict the data of astronomical observations and allows one to estimate how long we are now from the future big freeze doomsday.
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