Galactic halo bubble magnetic fields and UHECR deflections

• DOI: 10.1093/mnras/stac2778
• Publication Date: 2022-09-30T10:38:21Z
• Authors: Vasundhara Shaw; Arjen van Vliet; Andrew M Taylor
• Keywords: Local Bubble

We consider the synchrotron emission from electrons out in Galactic halo bubble region where Fermi structures reside. Utilising a simple analytical expression for non-thermal electron distribution and toy magnetic field model, we simulate polarised 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\%) large deflection angles ($\geq 80^{\circ}$) are possible locations whose line-of-sight pass through region. conclude can strongly dominate level UHECRs experience whilst propagating sources Earth.