The role of the Galactic Halo and the Single Source in the formation of the cosmic ray anisotropy

Erlykin, A.D.; Wolfendale, A. W.

doi:10.1016/j.astropartphys.2014.04.007

Cited by 3 publications

(1 citation statement)

References 29 publications

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“…In a recent paper on the anisotropy problem [1] we analysed the problem in detail using all available data. The results confirm the well-known facts that there is a region at energies below 1 PeV which has a phase opposite to expectation and a marked change of the phase in the Right Ascension (RA) plot starting from 1 PeV, where the amplitude of the anisotropy drops and then starts to rise again.…”

Section: Introductionmentioning

confidence: 99%

A Look at the Cosmic Ray Anisotropy with the Nonlocal Relativistic Transport Approach

Sibatov¹,

Erlykin²,

Учайкин³

et al. 2016

Proceedings of the 34th International Cosmic Ray Conference — PoS(ICRC2015)

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The Cosmic Ray anisotropy is a key element in the quest to find the origin of the enigmatic particles. A well known problem is that, although most of the likely sources are in the Inner Galaxy, the direction from which the lowest energy particles (less than about 1 PeV) come is largely from the Outer Galaxy. We show that this can be understood taking into account a possible reflection of charged particles by 'walls' in the Interstellar Medium or/and as a temporary phenomenon after the shock wave from the supernova explosion passed the Earth. This effect is too subtle to be explained by an ordinary diffusion theory and becomes apparent within the frames of the non-local relativistic transport theory, which involves conceptions of free motion velocity and path lengths with probability distributions of non-exponential type taken for a turbulent interstellar medium.

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Section: Introductionmentioning

confidence: 99%

A Look at the Cosmic Ray Anisotropy with the Nonlocal Relativistic Transport Approach

Sibatov¹,

Erlykin²,

Учайкин³

et al. 2016

Proceedings of the 34th International Cosmic Ray Conference — PoS(ICRC2015)

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Secondary cosmic ray nuclei in the light of the single source model and comparison with recent AMS-02 data

Erlykin

Wolfendale

2016

J. Phys. G: Nucl. Part. Phys.

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Evidence for a local 'Single Source' of cosmic rays is amassing by way of the recent precise measurements of various cosmic ray energy spectra from the AMS-02 instrument. To observations of individual cosmic ray nuclei, electrons, positrons and antiprotons must now be added the determination of the boron-to-carbon ratio and the energy spectrum of lithium to 2000 GV with high precision. Our analysis leads us to claim that, with certain assumptions about propagation in the Galaxy, the results confirm our arguments regarding the presence of a local single source, perhaps, a supernova remnant (SNR). An attempt is made to determine some of the properties of this SNR and its progenitor star.

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Examining the Secondary Product Origin of Cosmic-Ray Positrons with the Latest AMS-02 Data

Huang

Liu

Joshi

et al. 2020

ApJ

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Measurements of cosmic-ray (CR) positron fractions by PAMELA and other experiments have found an excess above 10 GeV relative to the standard predictions for secondary production in the interstellar medium. Although the excess has been mainly suggested to arise from some primary sources of positrons (such as pulsars and or annihilating dark matter particles), the almost constant flux ratio of argues for an alternative possibility that the excess positrons and antiprotons up to the highest energies are secondary products generated in hadronic interactions. Recently, Yang & Aharonian revisited this possibility by assuming the presence of an additional population of CR nuclei sources. Here we examine this secondary product scenario using the DRAGON code, where the radiative loss of positrons is taken into account consistently. We confirm that the CR proton spectrum and the antiproton data can be explained by assuming the presence of an additional population of CR sources. However, the corresponding positron spectrum deviates from the measured data significantly above 100 GeV due to strong radiative cooling. This suggests that although hadronic interactions can explain the antiproton data, the corresponding secondary positron flux is still not enough to account for the Alpha Magnetic Spectrometer data. Hence the contribution from some primary positron sources, such as pulsars or dark matter, is nonnegligible.

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The role of the Galactic Halo and the Single Source in the formation of the cosmic ray anisotropy

Cited by 3 publications

References 29 publications

A Look at the Cosmic Ray Anisotropy with the Nonlocal Relativistic Transport Approach

A Look at the Cosmic Ray Anisotropy with the Nonlocal Relativistic Transport Approach

Secondary cosmic ray nuclei in the light of the single source model and comparison with recent AMS-02 data

Examining the Secondary Product Origin of Cosmic-Ray Positrons with the Latest AMS-02 Data

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