Evolution of perturbation and power spectrum in a two-component ultralight axionic universe
Journal
Phys. Rev. D 103, 103516 (2021)
Journal Volume
103
Journal Issue
10
Date Issued
2020-12-14
Author(s)
Yi-Hsiung Hsu
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.
Subjects
astro-ph.CO; astro-ph.CO
Description
10 pages, 8 figures
Type
journal article