Implications of turbulence-dependent diffusion on cosmic-ray spectra

J. Dörner; P. Reichherzer; L. Merten; J. Becker Tjus; H. Fichtner; M.J. Pueschel; E.G. Zweibel

doi:10.22323/1.398.0090

Implications of turbulence-dependent diffusion on cosmic-ray spectra

J. Dörner (Corresponding author)
, P. Reichherzer
, L. Merten
, J. Becker Tjus
, H. Fichtner
, M.J. Pueschel
, E.G. Zweibel

Science and Technology of Nuclear Fusion

Research output: Contribution to journal › Conference article › peer-review

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Abstract

The propagation of cosmic rays can be described as a diffusive motion in most galactic environments. High-energy gamma-rays measured by Fermi have allowed inference of a gradient in the cosmic-ray density and spectral energy behavior in the Milky Way, which is not predicted by models. Here, a turbulence-dependent diffusion model is used to probe different types of cosmic-ray diffusion tensors. Crucially, it is demonstrated that the observed gradients can be explained through turbulence-dependent energy-scaling of the diffusion tensor.

Original language	English
Article number	090
Number of pages	6
Journal	Proceedings of Science
Volume	398
DOIs	https://doi.org/10.22323/1.398.0090
Publication status	Published - May 2022
Event	2021 European Physical Society Conference on High Energy Physics, EPS-HEP 2021 - Virtual, Online Duration: 26 Jul 2021 → 30 Jul 2021

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© 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)

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title = "Implications of turbulence-dependent diffusion on cosmic-ray spectra",

abstract = "The propagation of cosmic rays can be described as a diffusive motion in most galactic environments. High-energy gamma-rays measured by Fermi have allowed inference of a gradient in the cosmic-ray density and spectral energy behavior in the Milky Way, which is not predicted by models. Here, a turbulence-dependent diffusion model is used to probe different types of cosmic-ray diffusion tensors. Crucially, it is demonstrated that the observed gradients can be explained through turbulence-dependent energy-scaling of the diffusion tensor.",

author = "J. D{\"o}rner and P. Reichherzer and L. Merten and \{Becker Tjus\}, J. and H. Fichtner and M.J. Pueschel and E.G. Zweibel",

note = "Publisher Copyright: {\textcopyright} 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); 2021 European Physical Society Conference on High Energy Physics, EPS-HEP 2021 ; Conference date: 26-07-2021 Through 30-07-2021",

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T1 - Implications of turbulence-dependent diffusion on cosmic-ray spectra

AU - Dörner, J.

AU - Reichherzer, P.

AU - Merten, L.

AU - Becker Tjus, J.

AU - Fichtner, H.

AU - Pueschel, M.J.

AU - Zweibel, E.G.

N1 - Publisher Copyright: © 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)

PY - 2022/5

Y1 - 2022/5

N2 - The propagation of cosmic rays can be described as a diffusive motion in most galactic environments. High-energy gamma-rays measured by Fermi have allowed inference of a gradient in the cosmic-ray density and spectral energy behavior in the Milky Way, which is not predicted by models. Here, a turbulence-dependent diffusion model is used to probe different types of cosmic-ray diffusion tensors. Crucially, it is demonstrated that the observed gradients can be explained through turbulence-dependent energy-scaling of the diffusion tensor.

AB - The propagation of cosmic rays can be described as a diffusive motion in most galactic environments. High-energy gamma-rays measured by Fermi have allowed inference of a gradient in the cosmic-ray density and spectral energy behavior in the Milky Way, which is not predicted by models. Here, a turbulence-dependent diffusion model is used to probe different types of cosmic-ray diffusion tensors. Crucially, it is demonstrated that the observed gradients can be explained through turbulence-dependent energy-scaling of the diffusion tensor.

UR - https://www.scopus.com/pages/publications/85129427760

U2 - 10.22323/1.398.0090

DO - 10.22323/1.398.0090

M3 - Conference article

SN - 1824-8039

VL - 398

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 090

T2 - 2021 European Physical Society Conference on High Energy Physics, EPS-HEP 2021

Y2 - 26 July 2021 through 30 July 2021

ER -

Implications of turbulence-dependent diffusion on cosmic-ray spectra

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