Speaker
Olivier Tourmente
Description
More than a decade after their discovery, the mechanism behind the Fermi bubbles features is still elusive. The two main models considered for the advection of cosmic-rays (CRs) are a jet model for leptonic process or wind model for hadronic process. An alternative has been proposed where CRs, produced by pp collisions, are both diffused and advected by a Galactic breeze, ie a subsonic outflow. The first results provided a flat surface brightness in the same range than observations. The breeze profile took the form of a divergence-free outflow. In this paper we push the model further by using an hydrodynamic code introducing a divergence conduction to adiabatic losses for the $\gamma$-ray emission.
Co-authors
Dr
Donna Rodgers-Lee
(Dublin Institute of Advanced Studies)
Prof.
Andrew Taylor
(DESY Zeuthen)
