期刊
PHYSICAL REVIEW D
卷 90, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.90.041302
关键词
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资金
- European Research Council [247039]
- Grant RFBR [13-02-12175-ofi-m]
- European Research Council (ERC) [247039] Funding Source: European Research Council (ERC)
We investigate the possibility that the cosmic ray (CR) knee is entirely explained by the energy-dependent CR leakage from the Milky Way. We test this hypothesis calculating the trajectories of individual CRs with energies between E/Z = 10(14) eV and 10(17) eV propagating them in the regular and turbulent Galactic magnetic field. We find a knee-like structure of the CR escape time tau(esc)(E) around E/Z = few x 10(15) eV for a coherence length l(c) similar or equal to 2 pc of the turbulent field, while the decrease of tau(esc)(E) slows down around E/Z similar or equal to 10(16) eV in models with a weak turbulent magnetic field. Assuming that the injection spectra of CR nuclei are power laws, the resulting CR intensities in such a turbulence are consistent with the energy spectra of CR nuclei determined by KASCADE and KASCADE-Grande. We calculate the resulting CR dipole anisotropy as well as the source rate in this model.
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