IceCube: Neutrinos Associated with Cosmic Rays
Francis Halzen
TL;DR
IceCube aims to detect astrophysical neutrinos to identify cosmic ray sources, with recent progress and ongoing challenges in pinpointing extragalactic origins like Centaurus A and M87.
Contribution
This paper reviews IceCube's status and discusses its potential to discover cosmic ray sources, highlighting recent developments and future prospects.
Findings
IceCube has achieved significant sensitivity to astrophysical neutrinos.
Galactic sources like supernova remnants are likely sources of cosmic rays.
Extragalactic sources such as Centaurus A and M87 remain elusive.
Abstract
After a brief review of the status of the kilometer-scale neutrino observatory IceCube, we discuss the prospect that such detectors discover the still-enigmatic sources of cosmic rays. After all, this aspiration set the scale of the instrument. While only a smoking gun is missing for the case that the Galactic component of the cosmic-ray spectrum originates in supernova remnants, the origin of the extragalactic component remains as inscrutable as ever. We speculate on the role of the nearby active galaxies Centaurus A and M87.
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