Cosmological perturbations from statistical thermal fluctuations
classification
🌌 astro-ph.CO
gr-qchep-th
keywords
cosmologicalfluctuationsperturbationsstatisticalthermalarbitrarybeencharacterized
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Cosmological perturbations due to statistical thermal fluctuations in a single fluid characterized by an arbitrary equation of state are computed. Formulas to predict the scalar and tensor perturbation spectra and nongaussianity parameters at a given temperature are derived. These results are relevant to any cosmological scenario where cosmic structures may have been seeded thermally instead of originating purely from quantum vacuum fluctuations.
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