Model-independent Estimation of H0 and ΩK from Strongly Lensed Fast Radio Bursts
Abstract
Model-independent estimation of H0 and ΩK can provide clues about the origin of the intractable Hubble constant tension and the current cosmic-curvature crisis. Strongly lensed fast radio bursts (FRBs) have been proposed as precision probes of the universe since the time delay ~ ${ \mathcal O }$ (10 days) between images could be precisely measured due to short durations ~ ${ \mathcal O }({ms})$ of this kind of bright radio pulses. Here, on the basis of the distance sum rule, we investigate the capacity of model-independently estimating these two parameters from time-delay distances of strongly lensed FRBs and luminosity distances of the upcoming Wide Field InfraRed Survey Telescope (WFIRST) type Ia supernovae observations. Considering the expected FRB detection rate of upcoming facilities, we find that H0 could be determined to a ~1% precision and ΩK could be constrained to ~0.1 simultaneously from 10 lensed FRBs. These estimations, which are independent of the energy contents of the universe and validity of Einstein's equation on cosmological scales, will be complementary to popular probes and of great importance for clarifying the current crises of cosmology.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 2021
- DOI:
- 10.3847/1538-4357/abfa91
- Bibcode:
- 2021ApJ...916...70Z
- Keywords:
-
- Strong gravitational lensing;
- Cosmological parameters;
- Radio bursts;
- 1643;
- 339;
- 1339