Developments in Modeling the Galactic Magnetic Field
July 22, 2019
We present an improved 3D model of the strength and structure of the Galactic random field. The analysis uses the synchrotron intensity as measured by Planck, WMAP and Haslam et al. and the observed fluctuations of the rotation measures of extragalactic radio sources. As part of this modeling effort, we improve the separation of the various components of Galactic emission, the determination of the 3D cosmic ray electron density and spectrum, and the thermal electron distribution. This combined information allows us to constrain both the strength and coherence length of the random field. We also report developments in modeling the large scale coherent field of the Galaxy.
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