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arXiv 0901.1106hep-phastro-ph.COcond-mat.stat-mech
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暗物质轴子的玻色-爱因斯坦凝聚

Bose-Einstein Condensation of Dark Matter Axions

P. Sikivie, Q. Yang

摘要:

我们表明,冷的暗物质轴子热化并形成玻色-爱因斯坦凝聚体。我们得到了均匀各向同性宇宙中的轴子态,并导出了轴子小微扰方程。因为它们形成BEC,轴子在结构形成的非线性状态和进入视界时不同于普通的冷暗物质。轴子BEC提供了一种机制,生产净整体旋转的暗物质晕,并为宇宙微波各向异性多极的排列。

英文摘要:

We show that cold dark matter axions thermalize and form a Bose-Einstein condensate. We obtain the axion state in a homogeneous and isotropic universe, and derive the equations governing small axion perturbations. Because they form a BEC, axions differ from ordinary cold dark matter in the non-linear regime of structure formation and upon entering the horizon. Axion BEC provides a mechanism for the production of net overall rotation in dark matter halos, and for the alignment of cosmic microwave anisotropy multipoles.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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