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arXiv 1801.07348astro-ph.CO
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在大尺度结构观测中寻找暗物质-暗辐射相互作用的特征

Searching for Signatures of Dark matter-Dark Radiation Interaction in Observations of Large-scale Structure

Zhen Pan, Manoj Kaplinghat, Lloyd Knox

摘要:

在本文中,我们在最新的大尺度结构测量中搜索由Escher-Abad等人(2015)提出的暗物质-暗辐射相互作用的特征。我们发现,先前的索赔检测这种相互作用依赖于使用的SZ集群质量函数,忽略了质量可观测关系的不确定性。包括这种不确定性,我们发现推断的相互作用水平与数据保持一致,但零相互作用也是如此;即,不再有检测。我们还指出,从Ly $α$森林测量的物质功率谱的形状和幅度的推断是高度不一致的预测的$Λ$ CDM模型的普朗克CMB温度,偏振和透镜功率谱的条件下,和暗物质-暗辐射模型可以恢复的一致性。我们还从现象学的角度概括了Escher-Abad et al.(2015)的模型,以允许相互作用速率与温度的不同比例,并发现原始比例是数据的首选。

英文摘要:

In this paper, we conduct a search in the latest large-scale structure measurements for signatures of the dark matter-dark radiation interaction proposed by Buen-Abad et al. (2015). We show that prior claims of a detection of this interaction rely on a use of the SZ cluster mass function that ignores uncertainty in the mass-observable relationship. Including this uncertainty we find that the inferred level of interaction remains consistent with the data, but so does zero interaction; i.e., there is no longer a detection. We also point out that inference of the shape and amplitude of the matter power spectrum from Ly$α$ forest measurements is highly inconsistent with the predictions of the $Λ$CDM model conditioned on Planck CMB temperature, polarization, and lensing power spectra, and that the dark matter-dark radiation model can restore that consistency. We also phenomenologically generalize the model of Buen-Abad et al. (2015) to allow for interaction rates with different scalings with temperature, and find that the original scaling is preferred by the data.

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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