Beyond lensing by the cosmological constant
Valerio Faraoni, Marianne Lapierre-Leonard (Bishop's University)
TL;DR
This paper investigates how dark energy, including the cosmological constant, influences gravitational lensing by analyzing the Hawking quasilocal mass and its components, extending previous work beyond just the cosmological constant.
Contribution
It introduces a new approach using Hawking quasilocal mass to study the impact of dark energy on light deflection in gravitational lensing.
Findings
Dark energy affects gravitational lensing beyond the cosmological constant.
The method applies to any form of dark energy causing cosmic acceleration.
Provides a unified framework for analyzing lensing in accelerating universes.
Abstract
The long-standing problem of whether the cosmological constant affects directly the deflection of light caused by a gravitational lens is reconsidered. We use a new approach based on the Hawking quasilocal mass of a sphere grazed by light rays and on its splitting into local and cosmological parts. Previous literature restricted to the cosmological constant is extended to any form of dark energy accelerating the universe in which the gravitational lens is embedded.
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