Dark matter candidate induced by Horndeski theory: dark matter halo and cosmological evolution
General Relativity and Quantum Cosmology
2020-10-13 v2 High Energy Physics - Theory
Abstract
We study spherically symmetric solutions with a scalar field in the shift-symmetric subclass of the Horndeski theory. Constructing an effective energy-momentum tensor of the scalar field based on the two-fluid model, we decompose the scalar field into two components: dark matter and dark energy.We find the dark-matter fluid is pressure-less, and its distribution of energy density obeys the inverse-square law. We show the scalar field dark matter can explain the galaxy rotation curve and discuss the time evolution of the dark matter in the cosmic background.
Keywords
Cite
@article{arxiv.1911.04741,
title = {Dark matter candidate induced by Horndeski theory: dark matter halo and cosmological evolution},
author = {Jiaming Shi and Taishi Katsuragawa and Taotao Qiu},
journal= {arXiv preprint arXiv:1911.04741},
year = {2020}
}
Comments
25 pages,revtex4-1