PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - GAI - Gamma Ray Indirect
Cosmic ray transport in the proximity of pulsars and the formation of gamma-ray halos
S. Recchia*, M. Di Mauro, F. Aharonian, F. Donato, S. Gabici and S. Manconi
Full text: pdf
Pre-published on: July 04, 2021
Published on: March 18, 2022
The detection of an extended multi-TeV gamma ray emission around the Geminga and Monogem
pulsars by the HAWC collaboration provides a unique tool to investigate the transport properties of
cosmic rays in the turbulent magnetized interstellar medium. Previous analyses of such emission
in the framework of pure isotropic diffusion lead to infer a suppression of the diffusion coefficient
in the pulsars region by at least two orders of magnitude compared to typical values found in
models of Galactic cosmic ray propagation. In this work, we investigate the transition from the
ballistic to the diffusive regime, and show that, when such transition is taken into account, a good
fit to the HAWC γ−ray data around Geminga and Monogem is obtained with typical values of the
interstellar diffusion coefficient.
DOI: https://doi.org/10.22323/1.395.0925
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