Anisotropic String Cosmological Models in Heckmann-Suchuking Space-Time

TL;DR

This paper investigates the late-time acceleration of the universe using anisotropic string cosmological models in Heckmann-Suchuking space-time, fitting observational supernova data to determine key cosmological parameters.

Contribution

It introduces a string fluid-based anisotropic cosmological model and fits it to high-redshift supernova data to analyze the universe's acceleration.

Findings

Best fit matter density parameter: 0.2820

Best fit cosmological constant: 0.7177

Deceleration parameter: -0.5793

Abstract

In the present work we have searched the existence of the late time acceleration of the universe with string fluid as source of matter in anisotropic Heckmann-Suchking space-time by using 287 high red shift $(0.3 \leq z\leq 1.4)$ SN Ia data of observed absolute magnitude along with their possible error from Union 2.1 compilation. It is found that the best fit values for $(\Omega_{m})_{0}$, $(\Omega_{\Lambda})_{0}$, $(\Omega_{\sigma})_{0}$ and $(q)_{0}$ are 0.2820, 0.7177, 0.0002 $\&$ -0.5793 respectively. Several physical aspects and geometrical properties of the model are discussed in detail.