arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2209.13445astro-ph.COhep-ph
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改进的超轻轴子混合暗物质晕模型

Improved Mixed Dark Matter Halo Model for Ultralight Axions

Sophie M. L. Vogt, David J. E. Marsh, Alex Laguë

摘要:

提出了一个完整的混合暗物质晕模型,该模型由冷暗物质(CDM)和超轻类轴子粒子(ULA)组成。我们的模型将ULAs视为CDM的有偏见的示踪剂,类似于大质量中微子和中性氢的治疗。该模型考虑了CDM主机晕周围ULA的聚类,并完全模拟了两个组件的互相关性。模型的输入数据包括孤子的Jeans尺度和孤子密度分布。我们的模型可以用来预测的物质功率谱,$P(k)$,在非线性尺度上的ULAs在整个质量范围$10^{-33}\text{ eV}\leq m\leq 10^{-21}\text{ eV}$的子群体,并可以校准对未来的混合DM模拟,以提高其准确性。混合DM晕模型还允许我们评估各种近似的重要性。

英文摘要:

We present a complete halo model for mixed dark matter composed of cold dark matter (CDM) and ultralight axion-like particles (ULAs). Our model treats ULAs as a biased tracer of CDM, in analogy to treatments of massive neutrinos and neutral hydrogen. The model accounts for clustering of ULAs around CDM host halos, and fully models the cross correlations of both components. The model inputs include the ULA Jeans scale, and soliton density profile. Our model can be used to predict the matter power spectrum, $P(k)$, on non-linear scales for sub-populations of ULAs across the mass range $10^{-33}\text{ eV}\leq m\leq 10^{-21}\text{ eV}$, and can be calibrated against future mixed DM simulations to improve its accuracy. The mixed DM halo model also allows us to assess the importance of various approximations.

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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