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Table 1

EGMF strength regimes for no-cascade, pair-halo, and MBC development.

Regime number I II III
characterised by synchrotron losses 2πrg ≪ λIC 2πrg ≫ cτIC

EGMF strength B > 3 × 10-6 G 10-7G > B > 10-12 G B < 10-14 G
Synchrotron losses dominate over IC losses negligible negligible
Electromagnetic cascades no cascade pair haloes magnetically broadened cascades

Notes. The effects of synchrotron losses for multi-TeV electrons in different EGMF strengths are summarised. λIC and τIC represent the mean free path and cooling time for inverse Compton interactions with the CMB, respectively.

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