Speaker
Description
Cosmic ray data collected by experiments like Pamela, AMS-02, CALET, and
DAMPE show many spectral features that are not described by simple power
laws. These features may be giving information on the time-dependent
activity of individual cosmic ray sources, but the interpretation is
unclear. Because the same cosmic rays are interacting also in the
interstellar medium, these data are also intrinsically linked to the
diffuse emissions from the Galaxy. Recent work has shown that the past
activity of cosmic ray sources is indeed apparent in the high-energy
diffuse emissions, with features appearing over a wide range of angular
scales. I will talk about these time-dependent cosmic ray source models
and propagation calculations, which may be providing novel explanations
for features seen in high-energy gamma rays, such as the so-called
`Fermi Bubbles'.
