超光速粒子宇宙学、超新星数据和大刹车奇点
Tachyon cosmology, supernovae data and the Big Brake singularity
摘要:
我们比较了现有的观测数据Ia型超新星的宇宙演化预测的一个单参数家庭的快子模型,我们最近介绍的文件\cite{we-tach}。在与数据兼容的模型轨迹集中,有一个一致的子集,宇宙最终以一种称为“大刹车”的新型软宇宙学奇点结束。除了标准的$Λ$ CDM模型所预测的情况之外,这为宇宙的未来历史开辟了另一种情况。
英文摘要:
We compare the existing observational data on type Ia Supernovae with the evolutions of the universe predicted by a one-parameter family of tachyon models which we have introduced recently in paper \cite{we-tach}. Among the set of the trajectories of the model which are compatible with the data there is a consistent subset for which the universe ends up in a new type of soft cosmological singularity dubbed Big Brake. This opens up yet another scenario for the future history of the universe besides the one predicted by the standard $Λ$CDM model.
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