The baryonic Tully-Fisher relation and Fundamental Plane in the light of f(R) gravity

Here we use the samples of spiral and elliptical galaxies, in order to investigate theoretically some of their properties and to test the empirical relations, in the light of modified gravities.We show that the baryonic Tully-Fisher relation can be described in the light of f (R) gravity, without introducing the dark matter.Also, it is possible to explain the features of fundamental plane of elliptical galaxies without the dark matter hypothesis.