Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...130...19v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 130, no. 1, Jan. 1984, p. 19-28.
Astronomy and Astrophysics
Astrophysics
112
Cosmic Rays, Magnetohydrodynamic Waves, Particle Acceleration, Shock Wave Interaction, Supernova Remnants, Energy Dissipation, Hydrodynamics, Shock Heating
Scientific paper
Estimates considered more realistic are provided of the efficiency of diffusive acceleration in shock waves. This is accomplished by evaluating the steady state overall conservation relations in a hydrodynamic approximation that accounts self-consistently for the nonlinear interaction between the thermal gas, the cosmic rays, and the scattering wave field. One of the assumptions is that wave dissipation into the thermal gas keeps the wave activity at a level compatible with the underlying perturbation theory. The estimates in this direction are not conclusive, although for shock Mach numbers of approximately 5 (probably the most relevant for cosmic ray production in supernova remnants), dissipation may in fact be sufficiently strong to achieve this.
Drury Luke O'C.
McKenzie James F.
Voelk Heinrich J.
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