Nicolas Lehner

Nicolas Lehner is a Research Professor in the Department of Physics & Astronomy at the University of Notre Dame. His research focuses on understanding galaxy formation and evolution through multi-wavelength spectroscopy and imaging. He investigates large-scale baryon flows and the circumgalactic medium (CGM) to validate galaxy growth models. Key projects include studies of the Andromeda galaxy’s circumgalactic gas (Project AMIGA), the Large Magellanic Cloud’s (LMC) winds, and the interstellar medium in the Milky Way using the ULLYSES survey.

Education:

• B.Sc., Université Louis Pasteur, France (1994)
• M.Sc., Université Louis Pasteur, France (1995)
• Ph.D., Queen’s University Belfast, Northern Ireland (2000)

Research Interests: Lehner specializes in the dynamics of circumgalactic gas, galactic winds driven by supernovae, and the interplay between galaxies and their environments. His work bridges observational studies (e.g., HST/COS surveys like KODIAQ and CASBaH) and simulations (e.g., FOGGIE project) to map gas phases, metallicity distributions, and cosmic baryon cycles.

Publications Trends: Recent work emphasizes high-redshift CGM metallicity, Milky Way halo interfaces, and Magellanic system dynamics. Collaborations with Howk, Prochaska, and O’Meara dominate, focusing on HI absorption, O VI tracing, and multi-phase gas structure.

Awards/Grants: No awards explicitly listed, but active in NSF-funded projects (e.g., KODIAQ Survey).

Labs/Teams: Leads the AMIGA project and collaborates on the FOGGIE simulations. Involved in ULLYSES and CASBaH surveys.