Evolution of perturbation and power spectrum in a two-component ultralight axionic universe

The evolution of cosmic perturbations in a two-component ultralight axionic universe is investigated. We present the first spectral computation of perturbations in multicomponent 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.

Automated summary

The study investigates the evolution of cosmic perturbations in a two-component ultralight axionic universe, presenting the first spectral computation of perturbations in multicomponent universes. A particular case consisting of light extreme axions and free massive particles may lead to the formation of very high-redshift massive galaxies, potentially hosting massive early quasars. The computation retains information of perturbed velocities for individual axion components, offering a new avenue for setting up initial conditions for future axion dark matter simulations.