TY - GEN

T1 - The acceleration of inner-source pickup ions by a propagating interplanetary shock

AU - Giacalone, J.

PY - 2010

Y1 - 2010

N2 - We apply test-particle numerical simulations to model the acceleration of inner-source C+ by a strong interplanetary shock. The model consists of three distinct parts: (a) the distribution of inner-source pickup ions; (b) the initial acceleration of pickup ions (to produce seed particles) for a kinematically defined interplanetary shock; and (c) the acceleration to higher energies and the resulting event-averaged energy spectrum seen by an observer at 1 AU based on the solution to the Parker transport equation for a propagating shock. Our results are compared with observational estimates of the upper bound on the spectrum of C+ ions associated with the Aug. 25, 1998 solar-energetic particle event. Our calculated spectrum is very close to this upper-bound estimate, suggesting that the intensity of accelerated C+ is just at the sensitivity of measurement.

AB - We apply test-particle numerical simulations to model the acceleration of inner-source C+ by a strong interplanetary shock. The model consists of three distinct parts: (a) the distribution of inner-source pickup ions; (b) the initial acceleration of pickup ions (to produce seed particles) for a kinematically defined interplanetary shock; and (c) the acceleration to higher energies and the resulting event-averaged energy spectrum seen by an observer at 1 AU based on the solution to the Parker transport equation for a propagating shock. Our results are compared with observational estimates of the upper bound on the spectrum of C+ ions associated with the Aug. 25, 1998 solar-energetic particle event. Our calculated spectrum is very close to this upper-bound estimate, suggesting that the intensity of accelerated C+ is just at the sensitivity of measurement.

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U2 - 10.1063/1.3529958

DO - 10.1063/1.3529958

M3 - Conference contribution

AN - SCOPUS:79251566760

SN - 9780735408579

T3 - AIP Conference Proceedings

SP - 119

EP - 124

BT - Pickup Ions Throughout the Heliosphere and Beyond - Proceedings of the 9th Annual International Astrophysics Conference

T2 - 9th Annual International Astrophysics Conference on Pickup Ions Throughout the Heliosphere and Beyond: Dedicated to the Memory of Sir W. Ian Axford January 2, 1933 - March 13, 2010

Y2 - 14 March 2010 through 19 March 2010

ER -