http://arxiv.org/abs/2012.07602
Evolution of cosmic perturbations in two-component ultralight axionic universes 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 normally required to host massive early quasars. Our computation retains the information of perturbed velocities for individual axion components, an information that opens a new avenue for setting up initial conditions for future axion dark matter simulations.
Y. Hsu and T. Chiueh
Tue, 15 Dec 20
58/136
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