具有类时额外维度的膜世界
Braneworlds with timelike extra-dimension
摘要：
在这项工作中，我们考虑一个膜世界模型与类时额外的维。有很强的约束，这样一个模型的参数值产生的索赔，必须有一个物理解决方案的弗里德曼方程至少从现在到重组的时间。我们用Ia型超新星数据拟合了模型，并检查了结果与其他观测结果的一致性。对于与观测一致的参数值，膜世界模型与LambdaCDM宇宙是无法区分的，就所考虑的宇宙学测试而言。
英文摘要：
In this work, we consider a braneworld model with a timelike extra-dimension. There are strong constraints to the parameter values of such a model resulting from the claim that there must be a physical solution to the Friedmann equation at least between now and the time of recombination. We fitted the model to supernova type Ia data and checked the consistency of the result with other observations. For parameter values that are consistent with observations, the braneworld model is indistinguishable from a LambdaCDM universe as far as the considered cosmological tests are concerned.
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