97 citations · 136 across the 5 of their papers we have counts for
8 papers
Compact stars in the Einstein dark energy model
Zahra Haghani, Tiberiu Harko
We investigate the properties of high density compact objects in a vector type theory, inspired by Einstein's 1919 theory of elementary particles, in which Einstein assumed that el…
Generalizing the coupling between geometry and matter: gravity
Zahra Haghani, Tiberiu Harko
We generalize and unify the and type gravity models by assuming that the gravitational Lagrangian is given by an arbitrary function of the Ricci scalar , of…
Matter perturbations in Einstein dark energy model
Zahra Haghani
We consider the growth rate of matter perturbations in the Einstein dark energy theory. The theory consists of the Einstien-Hilbert Lagrangian plus the trace of the energy momentum…
Static spherically symmetric three-form stars
Bruno J. Barros, Zahra Haghani, Tiberiu Harko +1
We consider interior static and spherically symmetric solutions in a gravity theory that extends the standard Hilbert-Einstein action with a Lagrangian constructed from a three-for…
Growth of matter density perturbations in 4D Einstein-Gauss-Bonnet gravity
Zahra Haghani
Recently, a novel Einstein-Gauss-Bonnet gravity in four dimensions has been introduced [Phys. Rev. Lett. 124 (2020) 081301]. We will investigate cosmological consequences of this m…
Cosmology in theories with derivative matter coupling
Zahra Haghani, Shahab Shahidi
A new class of modified gravity theories with a healthy higher order derivative terms of a function of the matter Lagrangian is considered. Generally the energy momentum t…