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arXiv 1609.07041astro-ph.CO
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原始密度和BAO重建

Primordial density and BAO reconstruction

Hong-Ming Zhu, Ue-Li Pen, Xuelei Chen

摘要:

我们提出了一种新的方法来重建原始(线性)密度场的估计的非线性位移场。位移场的发散给出了重建的密度场。我们求解了一维宇宙学中的非线性位移场并给出了重建结果。新的重构算法恢复了大量的线性模态,显著减小了非线性阻尼尺度。成功的1D重建结果意味着新算法在3D情况下也应该是一种有前途的技术。

英文摘要:

We present a new method to reconstruct the primordial (linear) density field using the estimated nonlinear displacement field. The divergence of the displacement field gives the reconstructed density field. We solve the nonlinear displacement field in the 1D cosmology and show the reconstruction results. The new reconstruction algorithm recovers a lot of linear modes and reduces the nonlinear damping scale significantly. The successful 1D reconstruction results imply the new algorithm should also be a promising technique in the 3D case.

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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