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approfondimento - Cosmological Perturbations
Cosmological Perturbations of a Viscous Modified Chaplygin Gas Model Using the 1+3 Covariant Formalism
This research paper investigates the impact of a viscous modified Chaplygin gas model on the growth of cosmological perturbations, finding that while the energy density contrast decays with redshift in this model, it exhibits larger amplitudes compared to the standard ΛCDM model.
Observational Consequences of a Primordial Mean for Cosmological Perturbations
A non-zero, spatially dependent mean for primordial cosmological perturbations, potentially arising from a coherent initial quantum state during inflation, leads to violations of statistical homogeneity and isotropy, impacting cosmological observables like the matter power spectrum, CMB anisotropies, and spectral distortions.
宇宙論擾動在廣義類軸子暗能量模型中的研究
本文研究了一種類軸子暗能量模型的宇宙學擾動，探討了該模型如何緩解宇宙學巧合問題，並分析了其對宇宙結構形成的影響，特別是物質功率譜和 fσ8 分佈。
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