• Galactic dynamics: Role of resonances, chaos and dynamical friction in the secular evolution of galaxies, galaxy interactions and mergers
  • Dark matter: Constraining the nature of dark matter using the diffusive effect of dark matter substructure on dynamically cold stellar streams, alternative dark matter models (Ultralight axion or fuzzy dark matter, Self-interacting dark matter, QCD axion, etc.)
  • Black holes: Dynamics in black hole space-time, strong gravitational lensing due to black holes
  • Cosmology: Inflation, non-linear growth of perturbations and structure formation