3 papers
astro-ph.CO2024
Universal Basic Mass Density inside Dark Matter Halos
Fateen Haddad, Nidal Haddad
In this work we propose a universal basic mass density and a universal basic metric inside dark matter halos in the framework of Einstein equations providing an analytical ground f…
gr-qc2020
Solar System, Astrophysics, and Cosmology from the Derivative Expansion
Fateen Haddad, Nidal Haddad
In this paper we show how the solar system, the galactic, and the cosmological scales, are accommodated in a single framework, namely, in the derivative expansion framework. We con…
gr-qc2020
A Black Hole inside Dark Matter and the Rotation Curves of Galaxies
Fateen Haddad, Nidal Haddad
In this article we find a four-dimensional metric for a large black hole immersed in dark matter. Specifically, we look for and find a static spherically symmetric black hole solut…