Ponente
Descripción
TeV “halos” discovered around Geminga and Monogem by HAWC expose pockets of severely quenched particle diffusion close to middle-aged pulsars. Resolving the properties of these slow-diffusion zones, such as the size of the slow-diffusion zone, and local magnetic field strength, is pivotal for modelling lepton transport and for assessing the pulsars’ contribution to the local positron excess. The Cherenkov Telescope Array Observatory (CTAO), spanning ~30 GeV to beyond 100 TeV with arc-minute imaging, can sharpen those measurements decisively. We present end-to-end forecasts that couple two-zone GALPROP simulations to CTAO instrument response functions and realistic diffuse-background models. For both Geminga and Monogem, CTAO should pin down halo radii to ≲20%, and the injection spectral index to \Delta Gamma ≲ 0.2. Such precision will convert TeV-halo studies into a laboratory for cosmic-ray diffusion physics.
