Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 710, Issue 1, Pages L53-L57Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/710/1/L53
Keywords
acceleration of particles; cosmic rays; radio continuum: general; shock waves; stars: winds, outflows; supernovae: general
Categories
Funding
- AUGER [05 CU 5PD 1/2]
- NASA [NNX09AC14G]
- DOE [UD-FG02-91ER40626]
- Research Department of Plasmas with Complex Interactions (Bochum)
- NASA [120756, NNX09AC14G] Funding Source: Federal RePORTER
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One important prediction of acceleration of particles in the supernova caused shock in the magnet ic 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 high er particle energy. We predict that more precise observations will find a radio spectrum of nu(-2/3), at higher frequencies nu(-1), and at yet higher frequencies finally nu(-3/2).
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