Strong gravitational lensing in Horndeski theory of gravity

Bessa, Pedro

doi:10.1103/physrevd.108.024062

Cited by 1 publication

(1 citation statement)

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“…The use of gravitational lensing to study modified gravity is not new, but it has not been studied in great detail from its timing perspective. Some properties of gravitational lensing was studied under f (R, T ) [68] and Horndeski theories [69]. Moreover, a ray-tracing approach was utilized to construct weak lensing maps from the simulated light cones, enabling the examination of weak lensing effects under different gravity conditions [70].…”

Section: Discussionmentioning

confidence: 99%

Gravitational lensing in modified gravity: a case study for Fast Radio Bursts

Kalita,

Bhatporia,

Weltman

2023

J. Cosmol. Astropart. Phys.

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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. We use a set of Fast Radio Burst observations to constrain the fraction of dark matter made up of primordial black holes in such a theory. We further show that modified gravity adds a screening effect on gravitational lensing similar to the case when there is plasma in the path of the light ray acting as a scattering screen.

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Section: Discussionmentioning

confidence: 99%