SIMBAD references

2010ApJ...710L..53B - Astrophys. J., 710, L53-L57 (2010/February-2)

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

BIERMANN P.L., BECKER J.K., CACERES G., MELI A., SEO E.-S. and STANEV T.

Abstract (from CDS):

One important prediction of acceleration of particles in the supernova caused shock in the magnetic wind of exploding Wolf-Rayet and red supergiant stars is the production of an energetic particle component with an E –2 spectrum at a level on the order of 1% of the full cosmic ray electron population. After allowing for transport effects, so steepening the spectrum to E –7/3, this component as cosmic ray electrons readily explains the WMAP haze from the Galactic center region in spectrum, intensity, and radial profile; this requires the diffusion timescale 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.

Abstract Copyright: ∼

Journal keyword(s): acceleration of particles - cosmic rays - radio continuum: general - shock waves - stars: winds, outflows - supernovae: general

Simbad objects: 4

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