The WMAP haze from the Galactic Center region due to massive star explosions and a reduced cosmic ray scale height

Abstract

One important prediction of acceleration of particles in the supernova caused shock in the magnetic wind of exploding Wolf Rayet and Red Super Giant stars is the production of an energetic particle component with an E^-2 spectrum, at a level of a few percent in flux at injection. After allowing for transport effects, so steepening the spectrum to E^-7/3, this component of electrons produces electromagnetic radiation and readily explains the WMAP haze from the Galactic Center region in spectrum, intensity and radial profile. This requires the diffusion time scale for cosmic rays in the Galactic Center region to be much shorter than in the Solar neighborhood: the energy for cosmic ray electrons at the transition between diffusion dominance and loss dominance is shifted to considerably higher particle energy. We predict that more precise observations will find a radio spectrum of ν^-2/3, at higher frequencies ν^-1, and at yet higher frequencies finally ν^-3/2.

10 pages

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Cited by in corpus (20)

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• The origin of cosmic rays: Explosions of massive stars with magnetic winds and their supernova mechanism
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• Centaurus A: the one extragalactic source of cosmic rays with energies above the knee
• Ultra-High Energy Cosmic Rays from Centaurus A: Jet Interaction with Gaseous Shells
• The Radio Synchrotron Background: Conference Summary and Report
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• Active Galactic Nuclei Jets and Multiple Oblique Shock Acceleration: Starved Spectra
• Cosmic ray transport and anisotropies
• Cosmic microwave background constraints on light dark matter candidates
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• Searches for high-energy neutrino emission in the Galaxy with the combined IceCube-AMANDA detector
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• QUIJOTE scientific results -- VI. The Haze as seen by QUIJOTE
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