Gyroresonant surfing acceleration mechanism in space and astrophysical plasmas

Details Gyroresonant surfing acceleration mechanism in space and astrophysical plasmas Gyroresonant surfing acceleration mechanism in space and astrophysical plasmas

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh53a1250k&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SH53A-1250

Astronomy and Astrophysics

Astrophysics

7514 Energetic Particles (2114), 7845 Particle Acceleration, 7851 Shock Waves (4455), 7867 Wave/Particle Interactions (2483, 6984)

Scientific paper

We discuss a new acceleration mechanism of charged particles in space and astrophysical plasmas that was recently proposed in [1, 2]. In the presence of an electrostatic potential gradient and a circularly polarized electromagnetic monochromatic wave, particles are accelerated efficiently by keeping cyclotron resonance with the wave due to the electrostatic dragging force. In addition, particles can propagate against the electrostatic potential even if they have smaller parallel energy. This mechanism is potentially widely applicable, in terms of particle acceleration and transport, in various space and astrophysical plasmas, such as shock environment and short-large amplitude magnetic structures (SLAMS). In previous works it was studied in detail for parallel shocks in the parameter range corresponding to bow shocks and interplanetary shocks in the solar system. We include weakly relativistic effects and show that the very same acceleration mechanism can be very effective in the conditions of astrophysical shocks, such as supposed shocks of Supernova Remnants. 1. Kuramitsu, Y., Krasnoselskikh, V., Gyroresonant Surfing Acceleration, Physical Review Letters, vol. 94, Issue 3, id. 031102, 2005; 2. Kuramitsu, Y., Krasnoselskikh, V., Acceleration of charged particles by gyroresonant surfing at quasi-parallel shocks, A & A, 438, pp. 391-402, 2005.

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