Thermal Particle Injection in Nonlinear Diffusive Shock Acceleration
نویسندگان
چکیده
Donald C. Ellison, Pasquale Blasi, Stefano Gabici (a) Physics Dept., North Carolina State Univ., Raleigh, NC 27695, U.S.A. (b) High Energy Astrophysics Group, INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125, Firenze, Italy (c) Humboldt Fellow, Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany Presenter: Don Ellison (don [email protected]), usa-ellison-D-abs3-og14-oral
منابع مشابه
Diffusive Shock Acceleration: the Fermi Mechanism
The mechanism of diffusive Fermi acceleration at collisionless plasma shock waves is widely invoked in astrophysics to explain the appearance of non-thermal particle populations in a variety of environments, including sites of cosmic ray production, and is observed to operate at several sites in the heliosphere. This review outlines the principal results from the theory of diffusive shock accel...
متن کاملNonlinear Diffusive Shock Acceleration with Magnetic Field Amplification
We introduce a Monte Carlo model of nonlinear diffusive shock acceleration allowing for the generation of large-amplitude magnetic turbulence, i.e., ∆B ≫ B0, where B0 is the ambient magnetic field. The model is the first to include strong wave generation, efficient particle acceleration to relativistic energies in nonrelativistic shocks, and thermal particle injection in an internally self-cons...
متن کاملTurbulence Dissipation and Particle Injection in Nonlinear Diffusive Shock Acceleration with Magnetic Field Amplification
The highly amplified magnetic fields suggested by observations of some supernova remnant shells are most likely an intrinsic part of efficient particle acceleration by shocks. This strong turbulence, which may result from cosmicray-driven instabilities, both resonant and nonresonant, in the shock precursor, is certain to play a critical role in selfconsistent, nonlinear models of strong, cosmic...
متن کاملNon-linear Particle Acceleration in Oblique Shocks
The solution of the non-linear diffusive shock acceleration problem, where the pressure of the non-thermal population is sufficient to modify the shock hydrodynamics, is widely recognized as a key to understanding particle acceleration in a variety of astrophysical environments. We have developed a Monte Carlo technique for self-consistently calculating the hydrodynamic structure of oblique, st...
متن کاملar X iv : a st ro - p h / 99 06 11 4 v 1 7 J un 1 99 9 OG 3 . 3 . 20 1 Ion injection and acceleration at modified shocks
The theory of diffusive particle acceleration explains the spectral properties of the cosmic rays below energies of ≃ 10 eV as produced at strong shocks in supernova remnants (SNR’s). To supply the observed flux of cosmic rays, a significant fraction of the energy released by a supernova has to be transfered to cosmic rays. The key to the question of the efficiency of SNR’s in producing cosmic ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005