Evolution of perturbation and power spectrum in a two-component ultralight axionic universe
arXiv:2012.07602 · doi:10.1103/PhysRevD.103.103516
Abstract
The evolution of cosmic perturbations in a two-component ultralight axionic universe is investigated. We present the first spectral computation of perturbations in multi-component universes. A particular case composed of light extreme axions and free massive particles offers a possibility for the formation of very high-redshift massive galaxies, which are typically required to host massive early quasars. Our computation retains the information of perturbed velocities for individual axion components, opening a new avenue for setting up initial conditions for future axion dark matter simulations.
10 pages, 8 figures
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