| Issue |
EPJ Web Conf.
Volume 280, 2023
RICAP-22, 8th Roma International Conference on Astroparticle Physics
|
|
|---|---|---|
| Article Number | 02001 | |
| Number of page(s) | 4 | |
| Section | Galactic Sources | |
| DOI | https://doi.org/10.1051/epjconf/202328002001 | |
| Published online | 20 March 2023 | |
https://doi.org/10.1051/epjconf/202328002001
Ultra-high energy inverse Compton emission from Galactic electron accelerators
1
Max-Planck-Institut für Kernphysik,
Saupfercheckweg 1,
69117
Heidelberg, Germany
2
CGI Darmstadt,
Rheinstraße 95,
64295
Darmstadt, Germany
* e-mail: mischa.breuhaus@mpi-hd.mpg.de
Published online: 20 March 2023
It is generally held that >100 TeV emission from astrophysical objects unambiguously demonstrates the presence of PeV protons or nuclei, due to the unavoidable Klein–Nishina suppression of inverse Compton emission from electrons. However, in the presence of inverse Compton dominated cooling, hard high-energy electron spectra are possible. We show that the environmental requirements for such spectra can naturally be met in spiral arms, and in particular in regions of enhanced star formation activity, the natural locations for the most promising electron accelerators: powerful young pulsars. Leptonic scenarios are applied to gamma-ray sources recently detected by the High-Altitude Water Cherenkov Observatory (HAWC) and the Large High Altitude Air Shower Observatory (LHAASO). We show that these sources can indeed be explained by inverse Compton emission.
© The Authors, published by EDP Sciences, 2023
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