Probing the interaction between dark energy and dark matter with future fast radio burst observations

• Published in: Journal of cosmology and astroparticle physics Vol. 2023; no. 4; pp. 22 - 40
• Main Authors: Zhao, Ze-Wei, Wang, Ling-Feng, Zhang, Ji-Guo, Zhang, Jing-Fei, Zhang, Xin
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.04.2023
• Subjects: Big Bang theory; Cold dark matter; Constraining; Constraints; Cosmic microwave background; Dark energy; dark energy experiments; dark energy theory; Errors; Mathematical models; Parameters; Radio bursts; Radio telescopes; Red shift
• ISSN: 1475-7516; 1475-7516
• DOI: 10.1088/1475-7516/2023/04/022

Abstract 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. 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 β in four phenomenological IDE models. If we fix the FRB properties, about 10 5 FRB data can give constraints on β tighter than the current cosmic microwave background data in the IDE models with the interaction proportional to the energy density of dark energy. In all the IDE models, about 10 6 FRB data can achieve the absolute errors of β to less than 0.10, providing a way to precisely measure β by only one cosmological probe. Jointly constraining the FRB properties and cosmological parameters would increase the constraint errors of β by a factor of about 0.5–2.