We explore the possibility that the dark matter (DM) component in galaxies may originate
fractional gravity. In such a framework, the standard law of inertia continues to hold, but the …

To date, the only limit on graviton mass using galaxy clusters was obtained by Goldhaber
and Nieto in 1974, using the fact that the orbits of galaxy clusters are bound and closed, and …

In this paper, we have investigated one of the alternative theories to dark matter named
MOdified Gravity (MOG) by testing its ability to describe the local dynamics of the Milky Way …

Our main goal here is to conduct a comparative analysis between the well-known MOND
theory and a more recent model called the κ-model. An additional connection, between the κ …

Verlinde's theory of Emergent Gravity (EG) describes gravity as an emergent phenomenon
rather than a fundamental force. Applying this reasoning in de Sitter space leads to gravity …

Emergent Gravity (EG) has been proposed to resolve the missing mass problem in galaxies,
replacing the potential of dark matter (DM) by the effect of the entropy displacement of dark …

It is postulated that the zero point energy density of the quantum vacuum acts firstly as dark
energy and secondly as a fluid that builds the dark matter. Assisted by a small fraction of net …

In the last few years, there has been a resurgence of interest in obtaining observational
bounds on the graviton mass, following the detection of gravitational waves, because of the …

Abstract In General Relativity (GR), the graviton is massless. However, a common feature in
several theoretical alternatives of GR is a non-zero mass for the graviton. These theories can …

Abstract The Einstein–Hilbert action with a cosmological constant is the most general local
four-dimensional action leading to second-order derivative equations of motion that are …