Constraints on top-down models for the origin of UHECRs from the Pierre Auger Observatory data
Astrophysics
2019-08-13 v1
Abstract
Taking into account the Pierre Auger Observatory limits on the photon fraction among the highest energy cosmic rays, we show that the models based on the decay of super-heavy dark matter in the halo of our Galaxy are essentially excluded from being the sources of UHECRs unless their contribution becomes significant only above 100 EeV. Some top-down models based on topological defects are however compatible with the current data and may be best constrained in the future by the high-energy neutrino flux limit.
Keywords
Cite
@article{arxiv.0706.2960,
title = {Constraints on top-down models for the origin of UHECRs from the Pierre Auger Observatory data},
author = {D. V. Semikoz},
journal= {arXiv preprint arXiv:0706.2960},
year = {2019}
}
Comments
Contribution to the 30th International Cosmic Ray Conference, Merida, Mexico, July 2007