We improve on the model of the Galactic Magnetic Field (GMF) from Jannson\&Farrar (2012), which was constrained using all-sky rotation
measures of extragalactic sources and polarized and unpolarized synchrotron emission data from WMAP.
We have
* developed several alternative functional forms for the coherent and random components
* used newer synchrotron products from Planck and WMAP
* used new models of the densities of thermal electrons and cosmic-ray electrons.
The differences in the resultant GMF models, depending on which parameterization of the field, synchrotron product and electron densities are used, provides a measure of the uncertainty in our inference of the GMF. We discuss the impact of these uncertainties on charged-particle astronomy at ultra-high energies.
Volume 301 -
35th International Cosmic Ray Conference (ICRC2017) -
Session Cosmic-Ray Indirect. CRI- theory
Uncertainties in the Magnetic Field of the Milky Way
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Pre-published on:
August 16, 2017
Published on:
August 03, 2018
Abstract
DOI: https://doi.org/10.22323/1.301.0558
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.