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arXiv 1407.0141astro-ph.CO
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耦合标量场暗物质中的小尺度结构

Small scale structures in coupled scalar field dark matter

Joschka Beyer, Christof Wetterich

摘要:

我们研究了超轻标量场暗物质与精粹耦合的结构形成,特别是宇宙介子-玻色子系统。通过耦合场方程的数值解计算线性功率谱。我们推断的子结构丰富内的银河系般的晕。从最近的星系调查估计暗晕丰度意味着一个约$9 \times 10^{-22}$ eV的玻色子质量的下限。这似乎排除了在不久的将来通过脉冲星定时信号的时间变化检测标量场暗物质的可能性。

英文摘要:

We investigate structure formation for ultralight scalar field dark matter coupled to quintessence, in particular the cosmon-bolon system. The linear power spectrum is computed by a numerical solution of the coupled field equations. We infer the substructure abundance within a Milky Way-like halo. Estimates of dark halo abundances from recent galaxy surveys imply a lower bound on the bolon mass of about $9 \times 10^{-22}$ eV. This seems to exclude a possible detection of scalar field dark matter through time variation in pulsar timing signals in the near future.

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