The American Astronomical Society (AAS) has named Physics Professor Gus Evrard one of its 24 new Fellows for 2025. This prestigious recognition is awarded annually to less than 0.5% of AAS members for outstanding contributions to research, education, public outreach, and service in astronomy.

Professor Evrard continues the University of Michigan’s legacy of excellence in Astronomy. In the program’s five-year history, the University of Michigan celebrates seven Fellows: Gus Evrard and Fred Adams from U-M Physics, as well as Lee W. Hartmann, Edwin Bergin, Joel Bregman, John Monnier, and Patrick Seitzer from U-M Astronomy.

Evrard was honored for his pioneering research on large-scale structure formation, focusing on using galaxy clusters to constrain fundamental cosmological parameters. The AAS press release highlights his groundbreaking work on the mass function of dark matter halos, X-ray cluster mass estimates, and baryon content constraints.

Gus Evrard is an Arthur W. and Alice R. Burks Collegiate Professor of Physics and an Arthur F. Thurnau Professor. He studies phenomenological problems in cosmology using computational modeling of the formation and evolution of large-scale cosmic structure.