暗能量的矢量模型
Vector models for dark energy
摘要：
我们探讨了宇宙加速膨胀的现阶段是由于宇宙矢量场的存在的可能性。我们表明，矢量理论允许生成的加速阶段，而不引入潜在的条款或不自然的尺度在拉格朗日。我们提出了一个特定的模型，具有相同数量的参数LCDM和良好的拟合SNIa数据。该模型在辐射时代进行了标度，具有自然的初始条件，从而避免了宇宙符合问题。接下来的观测将能够清楚地将其与标准LCDM宇宙学区分开来
英文摘要：
We explore the possibility that the present stage of accelerated expansion of the universe is due to the presence of a cosmic vector field. We show that vector theories allow for the generation of an accelerated phase without the introduction of potential terms or unnatural scales in the Lagrangian. We propose a particular model with the same number of parameters as LCDM and excellent fits to SNIa data. The model is scaling during radiation era, with natural initial conditions, thus avoiding the cosmic coincidence problem. Upcoming observations will be able to clearly discriminate it from standard LCDM cosmology
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