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The Hunt for Pevatrons: The Case of Supernova Remnants

Observatoire de Paris, LUTH, 5 Place Jules Jansen, 92195 Meudon, France
Academic Editors: Ulisses Barres de Almeida and Michele Doro
Universe 2021, 7(9), 324;
Received: 26 July 2021 / Revised: 25 August 2021 / Accepted: 26 August 2021 / Published: 31 August 2021
The search for Galactic pevatrons is now a well-identified key science project of all instruments operating in the very-high-energy domain. Indeed, in this energy range, the detection of gamma rays clearly indicates that efficient particle acceleration is taking place, and observations can thus help identify which astrophysical sources can energize particles up to the ~PeV range, thus being pevatrons. In the search for the origin of Galactic cosmic rays (CRs), the PeV range is an important milestone, since the sources of Galactic CRs are expected to accelerate PeV particles. This is how the central scientific goal that is ’solving the mystery of the origin of CRs’ has often been distorted into ’finding (a) pevatron(s)’. Since supernova remnants (SNRs) are often cited as the most likely candidates for the origin of CRs, ’finding (a) pevatron(s)’ has often become ’confirming that SNRs are pevatrons’. Pleasingly, the first detection(s) of pevatron(s) were not associated to SNRs. Moreover, all clearly detected SNRs have yet revealed to not be pevatrons, and the detection from VHE gamma rays from regions unassociated with SNRs, are reminding us that other astrophysical sites might well be pevatrons. This short review aims at highlighting a few important results on the search for Galactic pevatrons. View Full-Text
Keywords: pevatrons; Galactic cosmic rays; gamma rays pevatrons; Galactic cosmic rays; gamma rays
MDPI and ACS Style

Cristofari, P. The Hunt for Pevatrons: The Case of Supernova Remnants. Universe 2021, 7, 324.

AMA Style

Cristofari P. The Hunt for Pevatrons: The Case of Supernova Remnants. Universe. 2021; 7(9):324.

Chicago/Turabian Style

Cristofari, Pierre. 2021. "The Hunt for Pevatrons: The Case of Supernova Remnants" Universe 7, no. 9: 324.

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