X-ray composite image of the Perseus Cluster from the Chandra Telescope
X-ray composite image of the Perseus Cluster from the Chandra Telescope.
​Image credit: X-ray: NASA/CXC/SAO/E.Bulbul, et al.

Suppression of thermal conduction in galaxy clusters

​Seminar by Gareth Roberg-Clark, University of Maryland

​Abstract of talk

Electron heat conduction is explored with particle-in-cell simulations and analytic modeling in a high $\beta$ system relevant to galaxy clusters. Linear wave theory reveals that long-wavelength whistler waves are driven unstable by electron heat flux in this regime. In a 2D system transverse whistlers can resonate with electrons propagating both along and opposite to the direction of the heat flux and resonant overlap leads to strong suppression of electron heat flux. The results suggest that electron heat conduction might be strongly suppressed in galaxy clusters.
 
Category Seminar
Location: Room F-N6115, Origo building north 6th floor, Fysikgården 1
Starts: 28 June, 2016, 11:00
Ends: 28 June, 2016, 12:00

Published: Thu 23 Jun 2016.