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Multi-wavelength constraints on cosmic-ray leptons in the Galaxy

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arxiv 1507.05958 v1 pith:HY2EPTWE submitted 2015-07-21 astro-ph.GA astro-ph.HE

E. Orlando , A. W. Strong , I. V. Moskalenko , C. Dickinson , S. Digel , T. R. Jaffe , G. Jóhannesson , J. P. Leahy
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T. A. Porter M. Vidal
This is my paper · ORCID
classification astro-ph.GAastro-ph.HE
keywords emissiondiffuseobservationspropagationradiocomparedfermi-latfield
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Cosmic rays (CRs) interact with the gas, the radiation field and the magnetic field in the Milky Way, producing diffuse emission from radio to gamma rays. Observations of this diffuse emission and comparison with detailed predictions are powerful tools to unveil the CR properties and to study CR propagation. We present various GALPROP CR propagation scenarios based on current CR measurements. The predicted synchrotron emission is compared to radio surveys, and synchrotron temperature maps from WMAP and Planck, while the predicted interstellar gamma-ray emission is compared to Fermi-LAT observations. We show how multi-wavelength observations of the Galactic diffuse emission can be used to help constrain the CR lepton spectrum and propagation. Finally we discuss how radio and microwave data could be used in understanding the diffuse Galactic gamma-ray emission observed with Fermi-LAT, especially at low energies.

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