Cosmic Degeneracies I: Joint N-body Simulations of Modified Gravity and Massive Neutrinos
Cosmic Degeneracies I: Joint N-body Simulations of Modified Gravity and Massive Neutrinos
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DOI：
10.1093/mnras/stu259
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发表时间：
2013-11
影响因子：
4.8
通讯作者：
M. Baldi;F. Villaescusa-Navarro;M. Viel;E. Puchwein;V. Springel;L. Moscardini
中科院分区：
文献类型：
--
作者：
M. Baldi;F. Villaescusa-Navarro;M. Viel;E. Puchwein;V. Springel;L. Moscardini
我们介绍了第一套宇宙N体模拟S，它同时包括了两个不同的和理论上独立的标准�清洁发展机制宇宙学场景的扩展--即修正引力(MG)的f(R)理论和大质量中微子的宇宙学背景--目的是研究它们可能的观测简并。我们重点讨论了大尺度物质分布的三个基本统计量，更具体地说是非线性物质功率谱、晕质量函数和晕偏置。我们的结果表明，虽然这两个扩展模型分别确定了所有三个统计量中非常显著的和潜在的可检测特征，但当我们允许它们同时工作时，这些特征被强烈抑制。特别是，当fR0=1×104的f(R)引力模型与总中微子质量为
We present the first suite of cosmological N-body simulation s that simultaneously include the effects of two different and theoretically indepe ndent extensions of the standard �CDM cosmological scenario ‐ namely an f(R) theory of Modified Gravity (MG) and a cosmological background of massive neutrinos ‐ with the aim to investigate their possible observational degeneracies. We focus on three basic statistics of the large-scale matter distribution, more specifically the nonlinear matter power spectr um, the halo mass function, and the halo bias. Our results show that while these two extended models separately determine very prominent and potentially detectable features in all t he three statistics, when we allow them to be simultaneously at work these features are strongly suppressed. In particular, when an f(R) gravity model with fR0 = 1 × 10 4 is combined with a total neutrino mass of