Pulsar wind nebula origin of the LHAASO-detected ultra-high energy γ-ray sources

• Verfasst von: Breuhaus, Mischa [VerfasserIn]
• Verfasst von: Reville, Brian [VerfasserIn]
• Verfasst von: Hinton, James Anthony [VerfasserIn]
• Titel: Pulsar wind nebula origin of the LHAASO-detected ultra-high energy γ-ray sources
• Verf.angabe: M. Breuhaus, B. Reville, and J.A. Hinton
• E-Jahr: 2022
• Jahr: 30 March 2022
• Umfang: 6 S.
• Fussnoten: Gesehen am 18.05.2022
• Titel Quelle: Enthalten in: Astronomy and astrophysics
• Ort Quelle: Les Ulis : EDP Sciences, 1969
• Jahr Quelle: 2022
• Band/Heft Quelle: 660(2022), Artikel-ID A8, Seite 1-6
• ISSN Quelle: 1432-0746
• DOI: doi:10.1051/0004-6361/202142097
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1802484426

Abstract

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.