An analysis of anisotropies in the arrival directions of galactic electrons and positrons, as well as protons, Helium, Carbon and Oxygen has been performed with the Alpha Magnetic Spectrometer on the International Space Station using the first 6.5 years (electrons and positrons) and the first 7.5 years (protons, Helium, Carbon, Oxygen) of data taking. Results on a dipole signal in Galactic coordinates are reported. The arrival directions of all studied cosmic ray species are consistent with isotropy. For energies above 16 GeV a limit of δ < 0.019 (δ < 0.005) at the 95% confidence level is obtained for positrons (electrons). For rigidities above 200 GV a limit of δ < 0.0038 (δ < 0.0036, δ < 0.019, δ < 0.017) at the 95% confidence level is obtained for protons (Helium, Carbon, Oxygen). The quoted limits are based on a total of 9.9×104 (1.3×106, 2×106,2.2×106, 6.1×104, 6.3×104) positron (electron, proton, Helium, Carbon, Oxygen) events.

Gebauer, I., Graziani, M., Casaus, J., Molero, M., Mana, C., Velasco, M., et al. (2019). Anisotropy of particle fluxes in primary cosmic rays measured with the alpha magnetic spectrometer on the ISS. In Proceedings of Science. Sissa Medialab Srl [10.22323/1.367.0117].

Anisotropy of particle fluxes in primary cosmic rays measured with the alpha magnetic spectrometer on the ISS

Gervasi M.;la Vacca G.;
2019

Abstract

An analysis of anisotropies in the arrival directions of galactic electrons and positrons, as well as protons, Helium, Carbon and Oxygen has been performed with the Alpha Magnetic Spectrometer on the International Space Station using the first 6.5 years (electrons and positrons) and the first 7.5 years (protons, Helium, Carbon, Oxygen) of data taking. Results on a dipole signal in Galactic coordinates are reported. The arrival directions of all studied cosmic ray species are consistent with isotropy. For energies above 16 GeV a limit of δ < 0.019 (δ < 0.005) at the 95% confidence level is obtained for positrons (electrons). For rigidities above 200 GV a limit of δ < 0.0038 (δ < 0.0036, δ < 0.019, δ < 0.017) at the 95% confidence level is obtained for protons (Helium, Carbon, Oxygen). The quoted limits are based on a total of 9.9×104 (1.3×106, 2×106,2.2×106, 6.1×104, 6.3×104) positron (electron, proton, Helium, Carbon, Oxygen) events.
abstract + slide
cosmic, ray, anisotropy
English
29th International Symposium on Lepton Photon Interactions at High Energies, LeptonPhoton 2019 5-10 August
2019
Proceedings of Science
2019
367
open
Gebauer, I., Graziani, M., Casaus, J., Molero, M., Mana, C., Velasco, M., et al. (2019). Anisotropy of particle fluxes in primary cosmic rays measured with the alpha magnetic spectrometer on the ISS. In Proceedings of Science. Sissa Medialab Srl [10.22323/1.367.0117].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/293167
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