Justin L. Ripley


Current and past positions

I am currently a postdoctoral research associate at the Department of Physics at the University of Illinois, Urbana-Champaign.

From 2020-2022 I was a postdoctoral research associate at the Department of Applied Math and Theoretical Physics at the University of Cambridge.

In 2020, I obtained my PhD from the Department of Physics, Princeton University, under the supervision of Frans Pretorius. A pdf of my thesis, General Relativity and its classical modification in gravitational collapse, can be found here.

My CV (pdf)

Contact: ripley [at] illinois [dot] edu

Research interests and publications

Broadly speaking my research has been in theoretical gravitational physics and gravitational wave astrophysics. I have done work in numerical relativity, black hole ringdown, modified gravity, neutron star physics, and relativistic fluids.

A description of some of my work can be found here.

A complete record of my publications can be accessed below.


My GitHub account. I have also worked with a couple of numerical relativity codes:

Slides from a few talks

Physics notes

Projects and notes on statistics


Interested in doing physics research? This website provides a general overview of the PhD and masters program in physics at UIUC.