Galactic halo bubble magnetic fields and UHECR deflections

ABSTRACT We consider the synchrotron emission from electrons out in Galactic halo bubble region where Fermi structures reside. Utilizing a simple analytical expression for non-thermal electron distribution and toy magnetic field model, we simulate polarized maps at frequency of 30 GHz. Comparing these with observational data, obtain constraints on parameters our model. this parameter value range determine corresponding arrival directions suppression factors ultra high energy cosmic rays (UHECRs) potential local source locations. find that levels flux (down to 2 per cent) large deflection angles (≥80°) are possible locations whose line sight pass through region. conclude can strongly dominate level UHECRs experience whilst propagating sources Earth.