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arXiv 1004.2682hep-phastro-ph.CO
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轴子玻色-爱因斯坦凝聚:一个超越冷暗物质的模型

Axion Bose-Einstein Condensation: a model beyond Cold Dark Matter

Q. Yang

摘要:

如果轴子热化,冷的暗物质轴子就会形成玻色-爱因斯坦凝聚体。最近,人们发现当光子温度达到T ~ 100 eV(f/10^1/2GeV)^1/2时,它们确实会热化,而且此后它们会继续热化。我们讨论了轴子BEC和CDM在密度微扰演化的线性区和非线性区的区别。我们发现,轴子BEC提供了一个机制,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:

Cold dark matter axions form a Bose-Einstein condensate if the axions thermalize. Recently, it was found that they do thermalize when the photon temperature reaches T ~ 100 eV(f/10^12GeV)^1/2 and that they continue to do so thereafter. We discuss the differences between axion BEC and CDM in the linear regime and the non-linear regime of evolution of density perturbations. We find that axion BEC provides a mechanism for the production of net overall rotation in dark matter halos, and for the alignment of cosmic microwave anisotropy multi-poles.

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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