Pulsar wind nebula origin of the LHAASO-detected ultra-high energy γ-ray sources
The recent measurement by LHAASO of gamma-ray emission extending up to hundreds of TeV from multiple Galactic sources represents a major observational step forward in the search for the origin of the Galactic cosmic rays. The burning question is if this ultra-high-energy emission is associated with...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
30 March 2022
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| In: |
Astronomy and astrophysics
Year: 2022, Volume: 660, Pages: 1-6 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/202142097 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1051/0004-6361/202142097 Verlag, lizenzpflichtig, Volltext: https://www.aanda.org/articles/aa/abs/2022/04/aa42097-21/aa42097-21.html 
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| Author Notes: | M. Breuhaus, B. Reville, and J.A. Hinton |
MARC
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| 520 | |a The recent measurement by LHAASO of gamma-ray emission extending up to hundreds of TeV from multiple Galactic sources represents a major observational step forward in the search for the origin of the Galactic cosmic rays. The burning question is if this ultra-high-energy emission is associated with the acceleration of protons and/or nuclei to PeV energies, or if it can be associated with PeV-electron accelerators. A strong Klein-Nishina suppression of inverse Compton emission at these energies is unavoidable; nevertheless, we show here that inverse Compton emission can provide a natural explanation for the measured emission and that an association with the established PeV-electron accelerating source class of pulsar wind nebulae is also rather natural. However, a clear distinction between different models requires taking multi-wavelength data into account, having good knowledge of the local environmental conditions, and, in some cases, performing multi-source modelling. | ||
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