Model for the diffuse gamma-ray and neutrino emission of the Milky Way at multi-TeV energies
Giacinti, Gwenael; Kachelriess, Michael; Koldobskiy, Sergey; Neronov, Andrii; Semikoz, Dmitri (2024-09-27)
27.09.2024
Semikoz, D., Giacinti, G., Kachelriess, M., Koldobskiy, S., & Neronov, A. (2023). Model for the diffuse gamma-ray and neutrino emission of the Milky Way at multi TeV energies. Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), 813. https://doi.org/10.22323/1.444.0813
https://creativecommons.org/licenses/by-nc-nd/4.0/
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
https://creativecommons.org/licenses/by-nc-nd/4.0/
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
https://creativecommons.org/licenses/by-nc-nd/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202501081088
https://urn.fi/URN:NBN:fi:oulu-202501081088
Tiivistelmä
Abstract
We are developing new model propagation of cosmic rays in the Galaxy from their sources in three dimensional magnetic field. The model automatically takes into account anisotropic distribution of cosmic rays around their sources at all stages of their propagation in the Galaxy up to their escape. Cosmic rays are interacting with interstellar gas and produce secondary gamma-ray and neutrinos. For this interactions we use recent AAfrag model. We compare predictions of the model for individual sources and for several regions of the Galaxy with existing gamma-ray and neutrino data. We show that in the Galactic Ridge the gamma-ray spectrum measured by Fermi and the neutrino spectrum measured by IceCube and ANTARES are in perfect agreement and are consistent with hadronic origin of diffuse gamma-ray flux corresponding to 1/E2.5 cosmic ray spectrum.
We are developing new model propagation of cosmic rays in the Galaxy from their sources in three dimensional magnetic field. The model automatically takes into account anisotropic distribution of cosmic rays around their sources at all stages of their propagation in the Galaxy up to their escape. Cosmic rays are interacting with interstellar gas and produce secondary gamma-ray and neutrinos. For this interactions we use recent AAfrag model. We compare predictions of the model for individual sources and for several regions of the Galaxy with existing gamma-ray and neutrino data. We show that in the Galactic Ridge the gamma-ray spectrum measured by Fermi and the neutrino spectrum measured by IceCube and ANTARES are in perfect agreement and are consistent with hadronic origin of diffuse gamma-ray flux corresponding to 1/E2.5 cosmic ray spectrum.
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