Understanding disk galaxies with the Tully-Fisher relation

The research presented in this Ph.D thesis is mainly focused on the Tully– Fisher relation as a tool, leading towards understanding the intrinsic properties of spiral galaxies such as their multi–wavelength luminosities, rotational velocities and masses of various baryonic components. The main focus of this work is to investigate the statistical properties of the multi– wavelength and baryonic Tully–Fisher relations, while taking advantage of spatially resolved Hi kinematics. This study performs fair comparisons and answers various open questions regarding the nature of this relation