Kasner type magnetized string cosmological models in F(R, T) gravity

Abstract

The Bianchi-I Kasner type metric with cosmic string and magnetic field in the framework of the f (R, T) theory of gravitation is considered. Three different functional forms of the function f (R, T) are chosen for investigation. We found that the strings exist in early stages of evolution of the Universe and they disappear as time increases. The variation of the equation of state (EoS) parameter ω = p/ρ < -1 may come from the effect of the string. We find that the string tension and rest energy density reduce in presence of magnetic field. The Universe is expanding and accelerating.