Papers › Evolution of perturbation and power spectrum in a two-component ultralight axionic universe
Evolution of perturbation and power spectrum in a two-component ultralight axionic universe
Yi-Hsiung Hsu, Tzihong Chiueh
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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.
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