1202.0355 (Angela V. Olinto)
Angela V. Olinto
Recent international efforts have brought us closer to unveiling the century
old mystery of the origin of cosmic rays. Cosmic ray, gamma ray, and neutrino
observatories are reaching the necessary sensitivity to study the highest
energy cosmic accelerators and to begin the use of cosmic particles to study
particle interactions above laboratory energies. The number of known gamma-ray
sources has increased by orders of magnitude. Possible cosmic ray sources have
narrowed down with the confirmation of an ankle and the GZK-like spectral
feature at the highest energies. Anisotropies in the distribution of arrival
directions of cosmic rays at intermediate energies show a complex local
neighborhood of the Galaxy. At the highest energies the dawn of particle
astronomy is still challenging while composition related measurements point to
a change in the composition or the interaction of cosmic rays at ultrahigh
energies. A clear resolution of the ultrahigh energy mystery calls for a
significant increase in statistics of cosmic ray and neutrino observations.
View original:
http://arxiv.org/abs/1202.0355
No comments:
Post a Comment