http://arxiv.org/abs/2210.07162
Interacting dark energy (IDE) scenario assumes that there exists a direct interaction between dark energy and cold dark matter, but this interaction is hard to be tightly constrained by the current data. Finding new cosmological probes to precisely measure this interaction could deepen our understanding of dark energy and dark matter. Fast radio bursts (FRBs) will be seen in large numbers by future radio telescopes, and thus they have potential to become a promising low-redshift cosmological probe. In this work, we investigate the capability of future FRBs of constraining the dimensionless coupling parameter $\beta$ in four phenomenological IDE models. We find that in the IDE models with the interaction proportional to the energy density of dark energy, about $10^5$ FRB data can give constraint on $\beta$ tighter than the current cosmic microwave background data. In all the IDE models, about $10^6$ FRB data can constrain the absolute errors of $\beta$ to less than $0.10$, providing a way to precisely measure $\beta$ by only one cosmological probe. The reconstruction of the interaction term also shows that the FRB data could help constrain the redshift evolution of interaction.
Z. Zhao, L. Wang, J. Zhang, et. al.
Fri, 14 Oct 22
33/75
Comments: 16 pages, 6 figures