Solar Modulation of Galactic Cosmic-Ray Electrons Measured with CALET

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ICRC2019_1126.pdf (10.17 MB)

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https://pos.sissa.it/358/1126/

Permanent Link

https://doi.org/10.22323/1.358.1126
 http://hdl.handle.net/11603/25361

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UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
UMBC Faculty Collection

Author/Creator

Author/Creator ORCID

https://orcid.org/0000-0002-9489-1515
 https://orcid.org/0000-0003-2916-6955

Date

2021-07-02

Type of Work

conference papers and proceedings
Text

Department

Program

Citation of Original Publication

“Solar Modulation of Galactic Cosmic-Ray Electrons Measured with CALET,” S. Miyake, Y. Migita, Y. Asaoka, Y. Akaike, S. Torii, T. Terasawa, R. Kataoka, and K. Sakai for the CALET Collaboration, Proceedings of Science: 36th International Cosmic Ray Conference , (Madison, WI), 1126 (2019). https://doi.org/10.22323/1.358.1126

Rights

This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain Mark 1.0

Subjects

Abstract

The CALorimetric Electron Telescope (CALET) installed on the International Space Station has multiple event trigger modes for measuring high-energy particles and gamma rays. The observations of the low-energy cosmic-ray (CR) electrons (electrons + positrons) in an energy region from 1 GeV to 10 GeV have been successfully performed by a low-energy shower trigger mode working in the geomagnetic polar regions. The continuous measurements of the low-energy CR electrons may provide a crucial key to the understanding of the solar modulation of the galactic cosmic rays. Here we have analyzed the low-energy CR electrons measured by CALET over the past three years to investigate the solar modulation of the CR electrons. We have obtained the continuous variation of the low-energy electron flux increasing as time passes, which have been expected from a recent weakening solar cycle. We have also confirmed that there are additional small fluctuations in the flux, that has a potential to be explained by the effects of the interplanetary coronal mass ejections or the co-rotating interaction region of the solar wind.