Astrophysics

Cosmic ray (CR) feedback significantly influences galaxy evolution by shaping the dynamics of interstellar and intergalactic media. To comprehend the microphysics underlying CR feedback, kinetic numerical simulations are imperative. I employ...

The QCD axion represents a compelling extension to the Standard Model of particle physics, being both a leading dark matter candidate and a potential solution to the Strong CP problem. In this talk, I describe our efforts toward experimental axion...

How did we get here? Are we alone? A fundamental milestone in answering these questions is the origin of Earth, an event that we are just now contextualizing, thanks to the discovery of thousands of exoplanets. Using telescopes, my group is...

Many modern techniques to analyze global planetary signals, from satellite gravity and the geoid, to magnetic fields, to the making of seismological models, heavily rely on a global function basis - the spherical harmonics. When the available data...

This presentation will overview initiatives created to overcome inequity in physics. We will discuss grassroots efforts like Black in Physics, institution-adjacent efforts like Change-Now at Fermilab, and APS-funded efforts like APS-IDEA, and...

The Bahcall Lunch follows the astrophysics colloquium lecture. 

The standard model of cosmology has passed every test over the last twenty years. Yet it remains unsatisfactory, with 95% of the universe being dark components, whose nature we did not understand. Now, there are possible ‘cracks’ in the model, as...