Gauge invariant Boltzmann equation and the fluid limit
classification
🌀 gr-qc
astro-ph
keywords
gaugeinvariantboltzmanndistributionequationfluidfunctionlimit
read the original abstract
This article investigates the collisionless Boltzmann equation up to second order in the cosmological perturbations. It describes the gauge dependence of the distribution function and the construction of a gauge invariant distribution function and brightness, and then derives the gauge invariant fluid limit.
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