A kinematic treatment to trace out the form of f (R) cosmology, within the Palatini formalism,
is discussed by only postulating the universe homogeneity and isotropy. To figure this out …

The compact stars are promising candidates associated with the generation of gravitational
waves (GWs). In this work, we study a special type of compact stars known as strange stars …

One of the most favorable extensions of General Relativity is the f (R) gravity. f (R) gravity in
Palatini formalism can be a realistic alternative to the dark energy problem. In this work, we …

In this work, we study the effect of diffusion of ultra-high energy cosmic ray (UHECR) protons
in the presence of turbulent magnetic fields (TMFs) in the light of the f (R) theory of gravity …

The Raychaudhuri equation enables to examine the whole spacetime structure without
specific solutions of Einstein's equations, playing a central role for the understanding of the …

In this paper, we conduct a study on the scalar field obtained from f (R) gravity via Weyl
transformation of the spacetime metric g μ ν from the Jordan frame to the Einstein frame. The …

We present a comprehensive dynamical systems analysis of homogeneous and isotropic
Friedmann-Lemaître-Robertson-Walker cosmologies in the Hu-Sawicki f (R) dark energy …

We study the effect of the cosmological constant on radial oscillations and gravitational wave
echoes (GWEs) of non-rotating strange stars. To depict strange star configurations we used …

The observed accelerated expansion of the Universe at present epoch can be explained by
some of the $ f (R) $ models without invoking the existence of dark energy or any other such …

We investigate the effects of the magnetic field and the redshift on the propagation of
galactic and extragalactic cosmic rays (CRs) in a modified theory of gravity (MTG) and an …