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arXiv 0801.1486astro-phgr-qchep-ph
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暗能量的宇宙矢量

A cosmic vector for dark energy

Jose Beltran Jimenez, Antonio L. Maroto

摘要:

在这项工作中,我们表明,在宇宙尺度上的矢量场的存在可以解释目前阶段的宇宙加速膨胀。该理论不含维数参数和势项,不需要早期宇宙的非自然初始条件,从而避免了所谓的宇宙符合问题。此外,它还以极好的精度拟合了高红移超新星的数据,对宇宙学参数做出了明确的预测。接下来的观测将能够清楚地将这个模型与具有宇宙学常数的标准宇宙学区分开来。

英文摘要:

In this work we show that the presence of a vector field on cosmological scales could explain the present phase of accelerated expansion of the universe. The proposed theory contains no dimensional parameters nor potential terms and does not require unnatural initial conditions in the early universe, thus avoiding the so called cosmic coincidence problem. In addition, it fits the data from high-redshift supernovae with excellent precision, making definite predictions for cosmological parameters. Upcoming observations will be able to clearly discriminate this model from standard cosmology with cosmological constant.

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