# Bianchi Type I Massive String Magnetized Barotropic Perfect Fluid Cosmological Model in General Relativity

## TL;DR

This paper develops a Bianchi Type I cosmological model incorporating massive strings, a magnetic field, and a barotropic perfect fluid, analyzing the universe's behavior with and without magnetic influence.

## Contribution

It introduces a deterministic Bianchi Type I universe model with magnetic fields and massive strings, extending previous work by including magnetic effects in anisotropic cosmology.

## Key findings

- Magnetic field influences the anisotropic evolution of the universe.
- Presence of massive strings affects the density and expansion dynamics.
- Model provides insights into early universe conditions with magnetic fields.

## Abstract

Bianchi type I massive string cosmological model with magnetic field of barotropic perfect fluid distribution through the techniques used by Latelier and Stachel, is investigated. To get the deterministic model of the universe, it is assumed that the universe is filled with barotropic perfect fluid distribution. The magnetic field is due to electric current produced along x-axis with infinite electrical conductivity. The behaviour of the model in presence and absence of magnetic field together with other physical aspects is further discussed.