# Could the Lyra manifold be the hidden source of the dark energy?

## TL;DR

This paper explores whether the Lyra manifold's geometry could be an intrinsic source of dark energy, offering a new model that aligns with the universe's observed accelerated expansion.

## Contribution

It introduces a five-dimensional LRS Bianchi type-I universe model within Lyra geometry, proposing it as a viable explanation for dark energy and cosmic acceleration.

## Key findings

- Lyra geometry can produce accelerated expansion consistent with observations
- The model behaves physically, dynamically, and kinematically as a universe with dark energy
- The geometry itself may be the hidden source of dark energy

## Abstract

In the course of investigation of our present universe by considering the five-dimensional locally rotationally symmetric (LRS) Bianchi type-I universe with time-dependent deceleration parameters in Lyra manifold, it is excitingly found that the geometry itself of Lyra manifold behaves and consistent with present observational findings for accelerating universe. The behavior of the universes and their contribution to the process of evolution are examined. While studying their physical, dynamical and kinematical properties for different cases, it is found that this model is a new and viable form of model universe containing dark energy. It will be very helpful in explaining the present accelerated expansion behavior of the universe.