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

Authors :
Yi-Hsiung Hsu
Tzihong Chiueh
Publication Year :
2020
Publisher :
arXiv, 2020.

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.<br />Comment: 10 pages, 8 figures

Details

Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....9fb977fca2acadaa3744be0ffd0ee118
Full Text :
https://doi.org/10.48550/arxiv.2012.07602