Primordial neutrinos, cosmological perturbations in interacting dark-energy model: CMB and LSS
Primordial neutrinos, cosmological perturbations in interacting dark-energy model: CMB and LSS
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DOI：
10.1088/1475-7516/2008/06/005
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发表时间：
2007-05
影响因子：
6.4
通讯作者：
K. Ichiki;Y. Keum
中科院分区：
文献类型：
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作者：
K. Ichiki;Y. Keum
给出了中微子-探测器相互作用暗能量模型的宇宙学微扰理论，计算了宇宙微波背景各向异性和物质功率谱。在这些模型中，中微子质量的演化是由精髓标量场决定的，这是今天宇宙加速的原因。我们考虑了几种类型的标量场势，并对中微子和暗能量之间的耦合参数进行了约束。假设宇宙是平坦的，我们可以从目前的观测中得出的约束是三种中微子之和的95%可信水平。我们还讨论了模型的稳定性问题以及变质量中微子对Boltzmann方程中散射项的影响。
We present the cosmological perturbation theory for neutrino-probe interacting dark-energy models and calculate the cosmic microwave background anisotropies and the matter power spectrum. In these models, the evolution of the mass of the neutrinos is determined by the quintessence scalar field, which is responsible for the cosmic acceleration today. We consider several types of scalar field potentials and put constraints on the coupling parameter between neutrinos and dark energy. Assuming the flatness of the universe, the constraint we can derive from the current observation is at the 95% confidence level for the sum over three species of neutrinos. We also discuss the stability issue of our model and on the impact of the scattering term in the Boltzmann equation from the mass-varying neutrinos.