Observation of Complex Time Structures in the Cosmic-Ray Electron and Positron Fluxes with the Alpha Magnetic Spectrometer on the International Space Station

(AMS Collaboration)

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We present high-statistics, precision measurements of the detailed time and energy dependence of the primary cosmic-ray electron flux and positron flux over 79 Bartels rotations from May 2011 to May 2017 in the energy range from 1 to 50 GeV. For the first time, the charge-sign dependent modulation during solar maximum has been investigated in detail by leptons alone. Based on 23.5×106 events, we report the observation of short-term structures on the timescale of months coincident in both the electron flux and the positron flux. These structures are not visible in the e+/e- flux ratio. The precision measurements across the solar polarity reversal show that the ratio exhibits a smooth transition over 830±30 days from one value to another. The midpoint of the transition shows an energy dependent delay relative to the reversal and changes by 260±30 days from 1 to 6 GeV.

Original languageEnglish
Article number051102
JournalPhysical review letters
Volume121
Issue number5
DOIs
Publication statusPublished - 2018 Jul 31

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Alpha Magnetic Spectrometer
electron flux
International Space Station
cosmic rays
positrons
primary cosmic rays
time dependence
energy
leptons
polarity
statistics
modulation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

@article{ac4a53e927ec4816855f4cb180d09977,
title = "Observation of Complex Time Structures in the Cosmic-Ray Electron and Positron Fluxes with the Alpha Magnetic Spectrometer on the International Space Station",
abstract = "We present high-statistics, precision measurements of the detailed time and energy dependence of the primary cosmic-ray electron flux and positron flux over 79 Bartels rotations from May 2011 to May 2017 in the energy range from 1 to 50 GeV. For the first time, the charge-sign dependent modulation during solar maximum has been investigated in detail by leptons alone. Based on 23.5×106 events, we report the observation of short-term structures on the timescale of months coincident in both the electron flux and the positron flux. These structures are not visible in the e+/e- flux ratio. The precision measurements across the solar polarity reversal show that the ratio exhibits a smooth transition over 830±30 days from one value to another. The midpoint of the transition shows an energy dependent delay relative to the reversal and changes by 260±30 days from 1 to 6 GeV.",
author = "{(AMS Collaboration)} and M. Aguilar and Cavasonza, {L. Ali} and G. Ambrosi and L. Arruda and N. Attig and S. Aupetit and P. Azzarello and A. Bachlechner and F. Barao and A. Barrau and L. Barrin and A. Bartoloni and L. Basara and {Başeǧmez-Du Pree}, S. and M. Battarbee and R. Battiston and U. Becker and M. Behlmann and B. Beischer and J. Berdugo and B. Bertucci and Bindel, {K. F.} and V. Bindi and {De Boer}, W. and K. Bollweg and V. Bonnivard and B. Borgia and Boschini, {M. J.} and M. Bourquin and Bueno, {E. F.} and J. Burger and F. Cadoux and Cai, {X. D.} and M. Capell and S. Caroff and J. Casaus and G. Castellini and F. Cervelli and Chae, {M. J.} and Chang, {Y. H.} and Chen, {A. I.} and Chen, {G. M.} and Chen, {H. S.} and Y. Chen and L. Cheng and Chou, {H. Y.} and E. Choumilov and V. Choutko and Chung, {C. H.} and Yi Yang",
year = "2018",
month = "7",
day = "31",
doi = "10.1103/PhysRevLett.121.051102",
language = "English",
volume = "121",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "5",

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TY - JOUR

T1 - Observation of Complex Time Structures in the Cosmic-Ray Electron and Positron Fluxes with the Alpha Magnetic Spectrometer on the International Space Station

AU - (AMS Collaboration)

AU - Aguilar, M.

AU - Cavasonza, L. Ali

AU - Ambrosi, G.

AU - Arruda, L.

AU - Attig, N.

AU - Aupetit, S.

AU - Azzarello, P.

AU - Bachlechner, A.

AU - Barao, F.

AU - Barrau, A.

AU - Barrin, L.

AU - Bartoloni, A.

AU - Basara, L.

AU - Başeǧmez-Du Pree, S.

AU - Battarbee, M.

AU - Battiston, R.

AU - Becker, U.

AU - Behlmann, M.

AU - Beischer, B.

AU - Berdugo, J.

AU - Bertucci, B.

AU - Bindel, K. F.

AU - Bindi, V.

AU - De Boer, W.

AU - Bollweg, K.

AU - Bonnivard, V.

AU - Borgia, B.

AU - Boschini, M. J.

AU - Bourquin, M.

AU - Bueno, E. F.

AU - Burger, J.

AU - Cadoux, F.

AU - Cai, X. D.

AU - Capell, M.

AU - Caroff, S.

AU - Casaus, J.

AU - Castellini, G.

AU - Cervelli, F.

AU - Chae, M. J.

AU - Chang, Y. H.

AU - Chen, A. I.

AU - Chen, G. M.

AU - Chen, H. S.

AU - Chen, Y.

AU - Cheng, L.

AU - Chou, H. Y.

AU - Choumilov, E.

AU - Choutko, V.

AU - Chung, C. H.

AU - Yang, Yi

PY - 2018/7/31

Y1 - 2018/7/31

N2 - We present high-statistics, precision measurements of the detailed time and energy dependence of the primary cosmic-ray electron flux and positron flux over 79 Bartels rotations from May 2011 to May 2017 in the energy range from 1 to 50 GeV. For the first time, the charge-sign dependent modulation during solar maximum has been investigated in detail by leptons alone. Based on 23.5×106 events, we report the observation of short-term structures on the timescale of months coincident in both the electron flux and the positron flux. These structures are not visible in the e+/e- flux ratio. The precision measurements across the solar polarity reversal show that the ratio exhibits a smooth transition over 830±30 days from one value to another. The midpoint of the transition shows an energy dependent delay relative to the reversal and changes by 260±30 days from 1 to 6 GeV.

AB - We present high-statistics, precision measurements of the detailed time and energy dependence of the primary cosmic-ray electron flux and positron flux over 79 Bartels rotations from May 2011 to May 2017 in the energy range from 1 to 50 GeV. For the first time, the charge-sign dependent modulation during solar maximum has been investigated in detail by leptons alone. Based on 23.5×106 events, we report the observation of short-term structures on the timescale of months coincident in both the electron flux and the positron flux. These structures are not visible in the e+/e- flux ratio. The precision measurements across the solar polarity reversal show that the ratio exhibits a smooth transition over 830±30 days from one value to another. The midpoint of the transition shows an energy dependent delay relative to the reversal and changes by 260±30 days from 1 to 6 GeV.

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U2 - 10.1103/PhysRevLett.121.051102

DO - 10.1103/PhysRevLett.121.051102

M3 - Article

VL - 121

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 5

M1 - 051102

ER -