oliver hahn


Oliver Hahn
Boulevard de l’Observatoire CS 34229
06304 Nice Cedex 4

Research interests

My main research focus is numerical simulations of structure formation in the Universe. Starting from our understanding of the very early universe, I perform simulations of a wide range of scales: how dark matter collapses and forms the seeds of galaxies, how the large-scale filamentary network of galaxies arises from the counteracting forces of the expansion of the universe and the pull of gravity; how the largest collapsed objects in the universe - clusters of hundreds and thousands of galaxies - form and evolve and what we can learn about our universe from those most extreme objects; and how galaxies form as part of the large-scale structure that feeds them with gas. I am also interested in developing numerical simulation techniques that allow us to answer questions about the universe both more precisely and more efficiently.


  • Starting grant of the European Research Council (2015)
  • Ambizione fellowship of the Swiss National Science Foundation (2011)

Career trajectory

  • University Professor, UCA/OCA, Nice, France (since 2015)
  • SNSF Ambizione Research Fellow, ETH Zurich, Switzerland (2012-2015)
  • KIPAC Postdoctoral Fellow, Stanford University/SLAC, USA (2009-2012)
  • Graduate Researcher, ETH ZUrich, Switzerland (2005-2009)