Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays

AMS Collaboration; Liqiu Wang

doi:10.1103/PhysRevLett.131.151002

Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays

AMS Collaboration, Liqiu Wang

Research output: Journal article publication › Journal article › Academic research › peer-review

2 Citations (Scopus)

Abstract

We present the precision measurements of 11 years of daily cosmic positron fluxes in the rigidity range from 1.00 to 41.9 GV based on 3.4×106 positrons collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The positron fluxes show distinctly different time variations from the electron fluxes at short and long timescales. A hysteresis between the electron fluxes and the positron fluxes is observed with a significance greater than 5σ at rigidities below 8.5 GV. On the contrary, the positron fluxes and the proton fluxes show similar time variation. Remarkably, we found that positron fluxes are modulated more than proton fluxes with a significance greater than 5σ for rigidities below 7 GV. These continuous daily positron fluxes, together with AMS daily electron, proton, and helium fluxes over an 11-year solar cycle, provide unique input to the understanding of both the charge-sign and mass dependencies of cosmic rays in the heliosphere.

Original language	English
Article number	151002
Journal	Physical Review Letters
Volume	131
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.131.151002
Publication status	Published - 13 Oct 2023

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.131.151002

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@article{2a198964454a4e649f8596a8684b768c,

title = "Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays",

abstract = "We present the precision measurements of 11 years of daily cosmic positron fluxes in the rigidity range from 1.00 to 41.9 GV based on 3.4×106 positrons collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The positron fluxes show distinctly different time variations from the electron fluxes at short and long timescales. A hysteresis between the electron fluxes and the positron fluxes is observed with a significance greater than 5σ at rigidities below 8.5 GV. On the contrary, the positron fluxes and the proton fluxes show similar time variation. Remarkably, we found that positron fluxes are modulated more than proton fluxes with a significance greater than 5σ for rigidities below 7 GV. These continuous daily positron fluxes, together with AMS daily electron, proton, and helium fluxes over an 11-year solar cycle, provide unique input to the understanding of both the charge-sign and mass dependencies of cosmic rays in the heliosphere.",

author = "{AMS Collaboration} and M. Aguilar and G. Ambrosi and H. Anderson and L. Arruda and N. Attig and C. Bagwell and F. Barao and M. Barbanera and L. Barrin and A. Bartoloni and R. Battiston and N. Belyaev and J. Berdugo and B. Bertucci and V. Bindi and K. Bollweg and J. Bolster and M. Borchiellini and B. Borgia and Boschini, {M. J.} and M. Bourquin and Burger, {W. J.} and Burger, {W. J.} and Cai, {X. D.} and M. Capell and J. Casaus and G. Castellini and F. Cervelli and Chang, {Y. H.} and Chen, {G. M.} and Chen, {G. R.} and H. Chen and Chen, {H. S.} and Y. Chen and L. Cheng and Chou, {H. Y.} and S. Chouridou and V. Choutko and Chung, {C. H.} and C. Clark and G. Coignet and C. Consolandi and A. Contin and C. Corti and Z. Cui and K. Dadzie and F. D'angelo and A. Dass and C. Delgado and {Della Torre}, S. and Liqiu Wang",

note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. ",

year = "2023",

month = oct,

day = "13",

doi = "10.1103/PhysRevLett.131.151002",

language = "English",

volume = "131",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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TY - JOUR

T1 - Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays

AU - AMS Collaboration

AU - Aguilar, M.

AU - Ambrosi, G.

AU - Anderson, H.

AU - Arruda, L.

AU - Attig, N.

AU - Bagwell, C.

AU - Barao, F.

AU - Barbanera, M.

AU - Barrin, L.

AU - Bartoloni, A.

AU - Battiston, R.

AU - Belyaev, N.

AU - Berdugo, J.

AU - Bertucci, B.

AU - Bindi, V.

AU - Bollweg, K.

AU - Bolster, J.

AU - Borchiellini, M.

AU - Borgia, B.

AU - Boschini, M. J.

AU - Bourquin, M.

AU - Burger, W. J.

AU - Cai, X. D.

AU - Capell, M.

AU - Casaus, J.

AU - Castellini, G.

AU - Cervelli, F.

AU - Chang, Y. H.

AU - Chen, G. M.

AU - Chen, G. R.

AU - Chen, H.

AU - Chen, H. S.

AU - Chen, Y.

AU - Cheng, L.

AU - Chou, H. Y.

AU - Chouridou, S.

AU - Choutko, V.

AU - Chung, C. H.

AU - Clark, C.

AU - Coignet, G.

AU - Consolandi, C.

AU - Contin, A.

AU - Corti, C.

AU - Cui, Z.

AU - Dadzie, K.

AU - D'angelo, F.

AU - Dass, A.

AU - Delgado, C.

AU - Della Torre, S.

AU - Wang, Liqiu

PY - 2023/10/13

Y1 - 2023/10/13

N2 - We present the precision measurements of 11 years of daily cosmic positron fluxes in the rigidity range from 1.00 to 41.9 GV based on 3.4×106 positrons collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The positron fluxes show distinctly different time variations from the electron fluxes at short and long timescales. A hysteresis between the electron fluxes and the positron fluxes is observed with a significance greater than 5σ at rigidities below 8.5 GV. On the contrary, the positron fluxes and the proton fluxes show similar time variation. Remarkably, we found that positron fluxes are modulated more than proton fluxes with a significance greater than 5σ for rigidities below 7 GV. These continuous daily positron fluxes, together with AMS daily electron, proton, and helium fluxes over an 11-year solar cycle, provide unique input to the understanding of both the charge-sign and mass dependencies of cosmic rays in the heliosphere.

AB - We present the precision measurements of 11 years of daily cosmic positron fluxes in the rigidity range from 1.00 to 41.9 GV based on 3.4×106 positrons collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The positron fluxes show distinctly different time variations from the electron fluxes at short and long timescales. A hysteresis between the electron fluxes and the positron fluxes is observed with a significance greater than 5σ at rigidities below 8.5 GV. On the contrary, the positron fluxes and the proton fluxes show similar time variation. Remarkably, we found that positron fluxes are modulated more than proton fluxes with a significance greater than 5σ for rigidities below 7 GV. These continuous daily positron fluxes, together with AMS daily electron, proton, and helium fluxes over an 11-year solar cycle, provide unique input to the understanding of both the charge-sign and mass dependencies of cosmic rays in the heliosphere.

UR - http://www.scopus.com/inward/record.url?scp=85175272088&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.131.151002

DO - 10.1103/PhysRevLett.131.151002

M3 - Journal article

C2 - 37897756

AN - SCOPUS:85175272088

SN - 0031-9007

VL - 131

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

M1 - 151002

ER -

Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays

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