Stochastic Relativistic Shock‐surfing Acceleration | Zendy

Benjamin D. G. Chandran | Zendy; Naoki Bessho | Zendy

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Stochastic Relativistic Shock‐surfing Acceleration

Author(s) -

Benjamin D. G. Chandran,

Naoki Bessho

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/422832

Subject(s) - physics , momentum (technical analysis) , shock (circulatory) , acceleration , diffusion , momentum diffusion , test particle , energy–momentum relation , quantum electrodynamics , monte carlo method , particle acceleration , plane (geometry) , perpendicular , computational physics , classical mechanics , mechanics , quantum mechanics , mathematics , geometry , medicine , statistics , finance , turbulence , economics

We study relativistic particles undergoing surfing acceleration atperpendicular shocks. We assume that particles undergo diffusion in thecomponent of momentum perpendicular to the shock plane due to moderatefluctuations in the shock electric and magnetic fields. We show that dN/dE, thenumber of surfing-accelerated particles per unit energy, attains a power-lawform, dN/dE \propto E^{-b}. We calculate b analytically in the limit of weakmomentum diffusion, and use Monte Carlo test-particle calculations to evaluateb in the weak, moderate, and strong momentum-diffusion limits.Comment: 20 pages, 6 figures, accepted by ApJ; this version corrects a few minor typographical error

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