  We study by Molecular Dynamics simulation a dense one-component system of
particles confined on a spherical substrate. We more specifically investigate
the evolution of the structural and dynamical properties of the system when
changing the control parameters, the temperature and the curvature of the
substrate. We find that the dynamics becomes glassy at low temperature, with a
strong slowdown of the relaxation and the emergence of dynamical heterogeneity.
The prevalent local $6$-fold order is frustrated by curvature and we analyze in
detail the role of the topological defects in the statics and the dynamics of
the particle assembly.
