Gravitational Lensing in Modified Gravity: A case study for Fast Radio Bursts

Understand

Over the last few decades, a plethora of modifications to general relativity have been proposed to solve a host of cosmological and astrophysical problems.

• Many modified gravity models are now ruled out with further astrophysical observations; some theories are still viable, with, at best, bounds on their parameters set by observations to date.
• More recently, observations of Fast Radio Bursts have proven to be remarkably powerful tools to constrain cosmology and fundamental physics.
• In this work, we consider a generic modified gravity theory and consider the implications for gravitational lensing with Fast Radio Bursts.