Effect of synchtrotron losses on multiple diffusive shock acceleration

Details Effect of synchtrotron losses on multiple diffusive shock acceleration Effect of synchtrotron losses on multiple diffusive shock acceleration

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pasa...14..251m&link_type=abstract

Publications Astronomical Society of Australia, vol. 14, no. 3, p. 251-257

Astronomy and Astrophysics

Astronomy

12

Particle Acceleration, Synchrotron Spectra, Shock Waves

Scientific paper

The effect of synchrotron losses on diffusive shock acceleration (DSA) at many shocks is treated numerically. Synchrotron losses determine a maximum energy to which electrons can be accelerated through DSA, and this is referred to as the synchrotron cutoff, pc. The distribution of accelerated electrons after many shocks is found (a) for a distribution injected at the initial shock, to tend to a plateau ($f(p)$ independent of p<~ 0.1pc), and (b) for the cumulative distribution from injection at each shock to tend to f(p)\propto p-b with b≈3 well below the synchrotron cutoff with a peak in the slope (bmin≈2) at p<~0.1pc. It is suggested that the latter result might account for the flat synchrotron spectra observed in some Galactic Centre sources.

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