A Method of Measuring Cosmic Magnetic Fields with Ultra High Energy Cosmic Ray Data

Understand

We present a method to measure cosmic magnetic fields with ultra high energy cosmic rays (UHECRs).

• We apply an advanced autocorrelation method to simulated UHECRs which includes their directional as well as energy information.
• Without explicit knowledge of the UHECR sources, such measurements are sensitive to the number of sources and to the magnetic field strength subjected to the UHECRs.
• Using a UHECR Monte Carlo model including sources, random walk propagation and a coherent deflection, we explain the procedure of reconstructing the allowed phase space of the model parameters from a simulated autocorrelation measurement.