Image Details
Caption: Figure D2.
Relevant energy-loss and acceleration timescales for HE electrons and protons. The gray shaded region represents the source age range of [0.09, 0.2] Myr. For the acceleration timescale, we adopt η acc = 0.1. IC cooling includes contributions from the CMB and IR photons with T IR ≃ 3050 K and energy density u IR ≃ 1.1 eV cm−3.
© 2026. The Author(s). Published by the American Astronomical Society.