Events on Monday, April 3rd, 2023
- Academic Calendar
- Students begin enrolling for Summer term courses according to their appointment times
- Abstract: *Note: actual end time may vary.* CONTACT: 262-3811, registrar@em.wisc.edu URL:
- Academic Calendar
- Enrollment appointment times for Fall term assigned to students (throughout week)
- Abstract: *Note: actual end time may vary.* CONTACT: 262-3811, registrar@em.wisc.edu URL:
- Plasma Physics (Physics/ECE/NE 922) Seminar
- Cosmic Ray Transport Theory in light of Milky Way Data
- Time: 12:00 pm
- Place: 2241 Chamberlin Hall
- Speaker: Philipp Kempski, Princeton University
- Abstract: Relativistic cosmic rays (CRs) may play an important role in the evolution of galaxies and clusters by driving galactic winds and heating diffuse gas. As a result, “CR feedback” has become a key ingredient in galaxy evolution models. However, a fundamental limitation of these models is that the nature of CR feedback is a very strong function of the assumed CR transport. Getting a better handle on the microphysics of CR propagation is therefore essential for understanding the macrophysics of CR feedback in galaxies. In this talk, I will discuss theoretical models of CR propagation and how CR spectra measured at Earth help us constrain their transport physics. I will show that existing theories of CR transport remain uncertain and are generally not in good agreement with local observations, which suggests that there may be a significant theoretical gap in our understanding of CR propagation.