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Towards Understanding the Origin of Cosmic-Ray Electrons

Precision results on cosmic-ray electrons are presented in the energy range from 0.5 GeV to 1.4 TeV based on $28.1\times 10^{6}$ electrons collected by the Alpha Magnetic Spectrometer on the International Space Station. In the entire energy range the electron and positron spectra have distinctly different magnitudes and energy dependences. The electron flux exhibits a significant excess starting from $42.1^{+5.4}_{−5.2} $ GeV compared to the lower energy trends, but the nature of this excess is different from the positron flux excess above $25.2 \pm 1.8$  GeV. Contrary to the positron flux, which has an exponential energy cutoff of $810^{+310}_{−180}$  GeV, at the 5σ level the electron flux does not have an energy cutoff below 1.9 TeV. In the entire energy range the electron flux is well described by the sum of two power law components. The different behavior of the cosmic-ray electrons and positrons measured by the Alpha Magnetic Spectrometer is clear evidence that most high energy electrons originate from different sources than high energy positrons.

Phys. Rev. Lett.122, 101101 (2019)
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AMS-02 Publications

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Towards Understanding the Origin of Cosmic-Ray Electrons
Phys. Rev. Lett.122, 101101 (2019), Citations: 10, View supplemental material and data
Published on: Editors' Suggestion
Towards Understanding the Origin of Cosmic-Ray Positrons
Phys. Rev. Lett. 122, 041102 (2019), Citations: 32, View supplemental material and data
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Precision Measurement of Cosmic-Ray Nitrogen and its Primary and Secondary Components with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett.121, 051103 (2018), Citations: 19, View supplemental material and data
Published on: Editors' Suggestion
Observation of Complex Time Structures in the Cosmic-Ray Electron and Positron Fluxes with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 121, 051102 (2018), Citations: 23, View supplemental material and data
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Observation of Fine Time Structures in the Cosmic Proton and Helium Fluxes with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 121, 051101 (2018), Citations: 26, View supplemental material and data
Published on: Editors' Suggestion Featured in Physics
Observation of New Properties of Secondary Cosmic Rays Lithium, Beryllium, and Boron by the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett.120, 021101 (2018), Citations: 61, View supplemental material and data
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Observation of the Identical Rigidity Dependence of He, C, and O Cosmic Rays at High Rigidities by the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 119, 251101 (2017), Citations: 66, View supplemental material and data
Published on: Editors' Suggestion Featured in Physics
Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett.117, 231102 (2016), Citations: 166, View supplemental material and data
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Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett.117, 091103 (2016), Citations: 265, View supplemental material and data
Published on: Editors' Suggestion
Precision Measurement of the Helium Flux in Primary Cosmic Rays of Rigidities 1.9 GV to 3 TV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett.115, 211101 (2015), Citations: 261, View supplemental material and data
Published on: Editors' Suggestion
Precision Measurement of the Proton Flux in Primary Cosmic Rays from Rigidity 1 GV to 1.8 TV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 114, 171103 (2015), Citations: 472, View supplemental material and data
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Precision Measurement of the (${\rm e}^+$ + ${\rm e}^−$) Flux in Primary Cosmic Rays from 0.5 GeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 113, 221102 (2014), Citations: 236, View supplemental material and data
Published on: Editors' Suggestion Featured in Physics
Electron and Positron Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 113, 121102 (2014), Citations: 439, View supplemental material and data
Published on: Editors' Suggestion
High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5 – 500 GeV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 113, 121101 (2014), Citations: 482, View supplemental material and data
Published on: Editors' Suggestion Featured in Physics Physics Viewpoint
First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–350 GeV
Phys. Rev. Lett. 110, 141102 (2013), Citations: 982, View supplemental material and data

* Citation information from High-Energy Physics Literature Database.