INVESTIGADORES
MOLLERACH Maria Silvia
artículos
Título:
The toes of the ultra high energy cosmic ray spectrum
Autor/es:
D. HARARI, S. MOLLERACH Y E. ROULET.
Revista:
JOURNAL OF HIGH ENERGY PHYSICS
Editorial:
SPRINGER
Referencias:
Año: 1999 vol. 08 p. 1 - 24
ISSN:
1126-6708
Resumen:
We study the effects of the galactic magnetic field on the ultra high
energy cosmic ray propagation. We show that the deflections of the
cosmic ray trajectories can have many important implications such as
(de)magnification of the cosmic ray fluxes by lensing effects (which can
modify the spectrum of individual sources), the formation of multiple
images of a source or the existence of regions of the sky to which the
Earth is almost blind. The appearance of image pairs is related to the
existence of critical curves in the magnification maps, which divide
regions in the sky where the images have opposite parities. The results
are pictorially illustrated as the stretching and folding of a `sheet'
describing the sky seen on Earth. Making use of the most energetic AGASA
events we emphasize the need to know the cosmic ray composition and the
structure of the magnetic field when attempting to do detailed cosmic
ray astronomy.