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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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Bibliographic Details
Main Authors: Breuhaus, Mischa (Author) , Reville, Brian (Author) , Hinton, James Anthony (Author)
Format: Article (Journal)
Language:English
Published: 30 March 2022
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
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Summary: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.
Item Description:Gesehen am 18.05.2022
Physical Description:Online Resource
ISSN:1432-0746
DOI:10.1051/0004-6361/202142097

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