Dartmouth Events

Abstract: Over the past half-century, it has become increasingly clear that turbulence is central to two of the biggest unsolved problems in astrophysics: the origins of cosmic magnetism and the nature of cosmic ray transport. However, much of our knowledge of these phenomena comes from studies performed in the magnetohydrodynamic (MHD) regime, which is fundamentally inapplicable in most of our Universe: in the hot and diffuse volume-filling regions of the cosmos, Coulomb collisions are negligible and we must take a kinetic approach, rather than a fluid approach. In this talk, I will discuss recent results from fully kinetic simulations of the collisionless small-scale dynamo and collisionless large-amplitude turbulence, establishing a self-consistent thread from the turbulent generation and amplification of magnetic fields to the scattering and acceleration of cosmic rays. These results may explain several observable phenomena in the interstellar medium of our Galaxy, in the intracluster medium of galaxy clusters, and in cosmic voids. 

Hosted by Assistant Professor Muni Zhou

Join Zoom meeting

https://dartmouth.zoom.us/s/99960465228

Email Rowan.m.kowalsky@dartmouth.edu for passcode