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Título del libro: 2009 Cern-Latin-American School Of High-Energy Physics, Clashep 2009 - Proceedings
Título del capítulo: High-energy cosmic-ray acceleration

Autores UNAM:
ANTONIO ORTIZ VELASQUEZ; ULISES JESUS SALDAÑA SALAZAR;
Autores externos:

Idioma:
Inglés
Año de publicación:
2010
Palabras clave:

Energy dissipation; High energy physics; Turbulent flow; Acceleration mechanisms; Cosmic ray flux; Energy spectra; Fermi acceleration; First-order; Realistic scenario; Shock acceleration; Ultra-high energies; Cosmic rays


Resumen:

We briefly review the basics of ultrahigh-energy cosmic-ray acceleration. The Hillas criterion is introduced as a geometrical criterion that must be fulfilled by potential acceleration sites, and energy losses are taken into account in order to obtain a more realistic scenario. The different available acceleration mechanisms are presented, with special emphasis on Fermi shock acceleration and its prediction of a power-law cosmic-ray energy spectrum. We conclude that first-order Fermi acceleration, though not entirely satisfactory, is the most promising mechanism for explaining the ultra-high-energy cosmic-ray flux.


Entidades citadas de la UNAM: