Galactic rotation curves in modified gravity with nonminimal coupling between matter and geometry

Palatini formulation of modified gravity with a nonminimal curvature-matter coupling

Solar System tests of some models of modified gravity proposed to explain galactic rotation curves without dark matter

We consider the recently estimated corrections ∆ ̟̇ to the Newtonian/Einsteinian secular precessions of the longitudes of perihelia ̟ of several planets of the Solar System in order to evaluate whether they are compatible with the predicted precessions due to models of long-range modified gravity put forth to account for certain features of the rotation curves of galaxies without resorting to dar...

Mirror Matter, Mirror Gravity and Galactic Rotational Curves

A bigravity theory where the normal and dark matter components are coupled to separate metric fields linked to each-other with small non-derivative terms allows the Yukawa-like modification of the gravitational potential at large distances. This opens new prospects for the dark matter candidates. Namely, instead of being cold and collisionless, dark matter can be collisional and dissipative, as...

Flat rotation curves in Chern-Simons modified gravity

Cosmology and Galactic Rotation Curves

We explore the possibility that the entire departure of galactic rotational velocities from their luminous Newtonian expectation be cosmological in origin, and show that within the framework of conformal gravity (but not Einstein gravity apparently) every static observer sees the overall Hubble flow as a local universal linear potential which is able to account for available data without any ne...