Tag: gravitational field

Island Universes: Galactic General Relativity without Dark Matter

We apply the perturbative technique which was previously developed in cosmology to now describe the gravitational field of a galaxy with arbitrary rotation curve. We use a Schwarzschild background as starting point, however with the correct physical coordinates. In the perturbation theory we find two classes of metric perturbations,...
Read More

Approximate Inertial Coordinate System Selections for Rotation Problems: The Gravitational Field of the Celestial Body Higher than the Object being Rotated: An Observational Study

Selection of the coordinate system is essential for rotation problems. Otherwise, mistakes may occur due to inaccurate measurement of angular speed. Approximate inertial coordinate system selections for rotation problems should be the gravitational field of the celestial body higher than the object being rotated: (1) the Earth fixed Cartesian...
Read More