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arXiv 1005.3587astro-ph.COgr-qchep-phhep-th
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全息暗能量模型中的宇宙年龄问题

Cosmic age problem revisited in the holographic dark energy model

Jinglei Cui, Xin Zhang

摘要:

由于在$z=3.91$发现了一个古老的类星体APM 08279+5255,一些暗能量模型面临着宇宙年龄问题的挑战。Wei和Zhang [Phys. Rev. D { \bf 76},063003(2007)]已经表明全息暗能量模型也受到这样一个宇宙年龄问题的困扰。为了容纳这个古老的类星体并解决年龄问题,我们在这封信中建议考虑非平坦宇宙中相互作用的全息暗能量。我们证明了在全息暗能量模型中同时考虑相互作用和空间曲率时,宇宙年龄问题可以消除。

英文摘要:

Because of an old quasar APM 08279+5255 at $z=3.91$, some dark energy models face the challenge of the cosmic age problem. It has been shown by Wei and Zhang [Phys. Rev. D {\bf 76}, 063003 (2007)] that the holographic dark energy model is also troubled with such a cosmic age problem. In order to accommodate this old quasar and solve the age problem, we propose in this Letter to consider the interacting holographic dark energy in a non-flat universe. We show that the cosmic age problem can be eliminated when the interaction and spatial curvature are both involved in the holographic dark energy model.

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