# Accelerated expansion of the Universe in the Presence of Dark Matter Pressure

## TL;DR

This paper investigates how dark matter pressure influences the Universe's expansion, showing that it can lead to higher Hubble parameters and accelerated growth, using observational data and cosmological models.

## Contribution

It introduces the effect of dark matter pressure on cosmic expansion dynamics, utilizing observational data to quantify its impact on key cosmological parameters.

## Key findings

- Dark matter pressure increases the Hubble parameter at all redshifts.
- Dark matter pressure contributes to the accelerated expansion of the Universe.
- The expansion rate is higher when dark matter pressure is considered.

## Abstract

Expansion dynamics of the Universe is one of the important subjects in modern cosmology. The dark energy equation of state determines this dynamics so that the Universe is in an accelerating phase. However, the dark matter can also affect the accelerated expansion of the Universe through its equation of state. In the present work, we explore the expansion dynamics of the Universe in the presence of dark matter pressure. In this regard, applying the dark matter equation of state from the observational data related to the rotational curves of galaxies, we calculate the evolution of dark matter density. Moreover, the Hubble parameter, history of scale factor, luminosity distance, and deceleration parameter are studied while the dark matter pressure is taken into account. Our results verify that the dark matter pressure leads to the higher values of the Hubble parameter at each redshift and the expansion of the Universe grows due to the DM pressure.