On the road to per cent accuracy VI: the non-linear power spectrum for interacting dark energy with baryonic feedback and massive neutrinos
On the road to per cent accuracy VI: the non-linear power spectrum for interacting dark energy with baryonic feedback and massive neutrinos
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通往百分之一精度的道路 VI：暗能量与重子反馈和大量中微子相互作用的非线性功率谱
DOI：
10.1093/mnras/stac641
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发表时间：
2022
影响因子：
4.8
通讯作者：
Carrilho P
中科院分区：
文献类型：
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作者：
Carrilho P
了解非线性结构的形成对于充分探索第四阶段调查产生的数据至关重要，这需要对功率谱进行准确的建模。对于Λ冷暗物质的偏离来说，这是一个挑战，但我们必须确保替代方案得到充分测试，以避免错误的检测。我们提出了暗能量相互作用的光晕模型反应框架的扩展。我们修改晕模型，包括暗散射模型中存在的附加力，并将其实现到react中。将该反应与meuclidemoator2的伪谱相结合，并比较了toN-body模拟。使用标准质量函数和浓度-质量关系，我们发现对于测试的最大相互作用强度（ξ = 50 b GeV−1），预测精度为1%，提高到2hMpc−1atz= 1。对于较小的相互作用强度（10 b GeV−1），我们发现在3.5hMpc−1以上的尺度上，atz= 1的一致性为1%，接近1hMpc−1atz= 0。最后，我们通过引入重子反馈和大质量中微子来改进我们的预测，并研究这些贡献和相互作用之间的简并性。将尺度限制在我们的模型精确度为1%的范围内，我们发现相互作用和反馈之间存在简并，但在大质量中微子中没有。我们期望带反馈的简并可以通过包含更小的尺度来解决。这项工作代表了计算相互作用暗能量模型非线性谱的第一个分析工具。
Understanding non-linear structure formation is crucial for fully exploring the data generated by stage IV surveys, requiring accurate modelling of the power spectrum. This is challenging for deviations from Λ cold dark matter, but we must ensure that alternatives are well tested, to avoid false detections. We present an extension of the halo model reaction framework for interacting dark energy. We modify the halo model including the additional force present in the Dark Scattering model and implement it intoReACT. The reaction is combined with a pseudo-spectrum fromEuclidEmulator2and compared toN-body simulations. Using standard mass function and concentration-mass relation, we find predictions to be 1 per cent accurate atz= 0 up tok= 0.8hMpc−1for the largest interaction strength tested (ξ = 50 b GeV−1), improving to 2hMpc−1atz= 1. For smaller interaction strength (10 b GeV−1), we find 1 per cent agreement atz= 1 up to scales above 3.5hMpc−1, being close to 1hMpc−1atz= 0. Finally, we improve our predictions with the inclusion of baryonic feedback and massive neutrinos and study degeneracies between the effects of these contributions and those of the interaction. Limiting the scales to where our modelling is 1 per cent accurate, we find a degeneracy between the interaction and feedback, but not with massive neutrinos. We expect the degeneracy with feedback to be resolvable by including smaller scales. This work represents the first analytical tool for calculating the non-linear spectrum for interacting dark energy models.