Speaker
Julien Dörner
(Ruhr University Bochum, RAPP-Center)
Description
The propagtion of cosmic rays can be described by diffusive motion in most galactic enviroments. Therfore, a detailed knowlege of the diffusion tensor is necessary. Recent analyses of the energy dependence of the diffusion tensor show a function of the turbulence level $b/B$, i.e. $\kappa_i \propto E^{\gamma_i}$ with $\gamma_i = \gamma_i(b/B)$, where $i\in \{\parallel, \perp\}$. (Reichherzer et al, MNRAS 498:5051–5064 (2020))
In this talk we show the implication of this turbulence-dependent diffusion on the radial dependence of the cosmic-ray spectral index and the transition between parallel and perpendicular component. Finally, we interpret the cosmic-ray gradient detected by Fermi in the light of these findings.
| First author | Julien Dörner |
|---|---|
| jdo@tp4.rub.de | |
| Collaboration / Activity | n/a |
Primary author
Julien Dörner
(Ruhr University Bochum, RAPP-Center)
Co-authors
Patrick Reichherzer
(Ruhr University Bochum, RAPP-Center)
Dr
Lukas Merten
(University of Innsbruck)
Julia Tjus
(Ruhr-Universität Bochum)
Horst Fichtner
(Ruhr University Bochum)
Dr
M.J. Pueschel
(Eindhoven University of Technology, Duthc Insitute for Fundamental Energy Research)
Prof.
Ellen Zweibel
(University of Wisconsin, )
