Speaker
Enrico PERETTI
Description
Extreme accretion goes hand to hand with strong winds and outflows.
In particular, winds are observed to reach mildly relativistic velocities and develop bubble structures in
super-Eddington accreting stellar mass compact objects powering Ultra-Luminous X-ray Sources (ULXs).
I will present a model for particle acceleration and associated multi-messenger emission in the bubbles powered by ULXs.
I will particularly focus on the maximum energy available to protons in these systems and possible gamma-ray spectra.
I will eventually discuss an application of such a model in the context of SS 433, a Galactic source recently detected by LHAASO up to hundreds TeV.
