TL;DR
This paper explores holographic dark energy within Brans-Dicke gravity, finding that certain infrared cutoffs do not produce acceleration, but the event horizon cutoff can model dark energy effectively.
Contribution
It introduces an extended holographic dark energy model in Brans-Dicke theory and identifies the event horizon as a viable infrared cutoff for acceleration.
Findings
Hubble scale and particle horizon cutoffs do not lead to acceleration.
Event horizon cutoff can produce a viable dark energy model.
Extended holographic dark energy is compatible with Brans-Dicke gravity.
Abstract
The idea of relating the infrared and ultraviolet cutoffs is applied to Brans-Dicke theory of gravitation. We find that extended holographic dark energy from the Hubble scale or the particle horizon as the infrared cutoff will not give accelerating expansion. The dynamical cosmological constant with the event horizon as the infrared cutoff is a viable dark energy model.
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