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Cosmography in gravity
Cosmography is an ideal tool to investigate the cosmic expansion history of the Universe in
a model-independent way. The equations of motion in modified theories of gravity are …
a model-independent way. The equations of motion in modified theories of gravity are …
Cosmic acceleration with bulk viscosity in modified f (Q) gravity
In this article, we have investigated the role of bulk viscosity to study the accelerated
expansion of the universe in the framework of modified f (Q) gravity. The gravitational action …
expansion of the universe in the framework of modified f (Q) gravity. The gravitational action …
Tsallis holographic dark energy scenario in viscous gravity with tachyon field
This study investigates a bulk viscous fluid anisotropic cosmological model with f (Q) gravity.
Here, Q stands for the nonmetricity factor that drives gravitational interaction. We …
Here, Q stands for the nonmetricity factor that drives gravitational interaction. We …
Power-law cosmology in Weyl-type f (Q, T) gravity
Gravity is attributed to the spacetime curvature in classical general relativity (GR). But, other
equivalent formulations or representations of GR, such as torsion or non-metricity, have …
equivalent formulations or representations of GR, such as torsion or non-metricity, have …
Impact of charge on the stability of pulsar SAX J1748. 9-2021 in modified symmetric teleparallel gravity
M Sharif, M Ajmal - Astroparticle Physics, 2025 - Elsevier
In this paper, we explore the effect of charge on the stability of pulsar star SAX J1748. 9-
2021 in f (Q) gravity, where Q represents non-metricity. For this purpose, we apply the Krori …
2021 in f (Q) gravity, where Q represents non-metricity. For this purpose, we apply the Krori …
Viscous cosmology in f(T) gravity
J Yang, RH Lin, XH Zhai - The European Physical Journal C, 2022 - Springer
We propose a new model for the viscosity of cosmic matters, which can be applied to
different epochs of the universe. Using this model, we include the bulk viscosities as …
different epochs of the universe. Using this model, we include the bulk viscosities as …
[HTML][HTML] Bulk viscous matter and the cosmic acceleration of the universe in f (Q, T) gravity
We have studied bulk viscosity in the modified f (Q, T) gravity theory formalism, where Q
represents the non-metricity and T denotes the trace of energy-momentum tensor within a …
represents the non-metricity and T denotes the trace of energy-momentum tensor within a …
Observational Constraints and Some Toy Models in f(Q) Gravity with Bulk Viscous Fluid
The standard formulation of general relativity fails to describe some recent interests in the
universe. It impels us to go beyond the standard formulation of gravity. The f (Q) gravity …
universe. It impels us to go beyond the standard formulation of gravity. The f (Q) gravity …
Cosmological constraints on bulk viscous gravity
Abstract In the General Theory of Relativity (GR) gravitational interactions are described by
the scalar Ricci curvature. But there exists another class of modified gravity theories …
the scalar Ricci curvature. But there exists another class of modified gravity theories …
Cosmic evolution of the Kantowski-Sachs universe in the context of a bulk viscous string in teleparallel gravity
In the present work, we analyzed the Kantowski-Sachs cosmological model and teleparallel
gravity, where a bulk viscous fluid containing one-dimensional cosmic strings is the source …
gravity, where a bulk viscous fluid containing one-dimensional cosmic strings is the source …