Risa Wechsler
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our major research interests are focused on understanding the growth of structure in the universe, how structure formation drives galaxy formation, and how galaxies can be used to probe the fundamental physics of the universe, including the nature of dark matter and dark energy. our group uses large computer simulations, physical and empirical models, and the deepest and largest galaxy surveys to determine how the universe formed and evolved.

​some of the current topics we are working on include:

dark energy


  • dark energy constraints from galaxy clusters
  • dark energy constraints from weak gravitational lensing
  • dark energy constraints using galaxy statistics down to small scales

dark matter


  • dark matter constraints from milky way satellites
  • probing the evolution of dark matter using weak gravitational lensing
  • looking for dark matter substructure in strong gravitational lenses
  • predictions for the spatial and velocity distribution of matter in dark matter halos

galaxy formation


  • precise models of the galaxy-halo connection
    • implications for galaxy formation and evolution
    • as a tool for interpreting measurements from large cosmological surveys
  • understanding dwarf satellites in the Milky Way and beyond
  • the mass distribution and galaxy content of galaxy clusters
  • using intensity mapping to probe faint galaxies and the gas-halo connection
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  • Home
  • Who
    • GFC Group
    • CV
  • What
    • Research
    • Collaborations
    • Publications
    • Press
    • Technical Talks
    • Public Talks
    • Teaching
  • Where
  • News
  • Useful things