Comment on "On the Origin of the Highest Energy Cosmic Rays"

Details Comment on "On the Origin of the Highest Energy Cosmic Rays" Comment on "On the Origin of the Highest Energy Cosmic Rays"

1998-06-18

arxiv.org/abs/astro-ph/9806251v1

Phys.Rev.Lett. 81 (1998) 3295

Astronomy and Astrophysics

Astrophysics

1 page, 2 figures

Scientific paper

10.1103/PhysRevLett.81.3295

We show that the photodisintegration of heavy cosmic ray nuclei with energies
above 10^20 eV is dominated by interactions with photons from the cosmic
microwave background radiation, rather than from infrared ones. This implies
that the observed air shower events with energies 2-3 10^20 eV cannot originate
from Fe nuclei coming from distances beyond 10 Mpc

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