PeV Gamma Rays from Interactions of Ultra High Energy Cosmic Rays in the Milky Way
Nayantara Gupta
TL;DR
This paper calculates the PeV gamma ray background resulting from ultra high energy cosmic rays interacting within the Milky Way, suggesting future detections could reveal Galactic cosmic accelerators.
Contribution
It provides the first detailed calculation of PeV gamma ray background from cosmic ray interactions in the Milky Way and links potential detections to Galactic sources.
Findings
PeV gamma ray background from cosmic ray interactions is quantifiable.
Detection of galactocentric PeV gamma rays would indicate EeV cosmic accelerators.
Galactic point sources may emit detectable PeV gamma rays.
Abstract
The PeV gamma ray background produced in the interactions of ultra high energy cosmic rays with the ambient matter and radiations during their propagation in the Milky Way has been calculated in this paper. If the primary ultra high energy cosmic rays are produced from Galactic point sources then those point sources are also emitting PeV gamma rays. We discuss that the detection of galactocentric PeV gamma rays in the future would be a signature of the presence of EeV cosmic accelerators in the Milky Way.
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