Measurement of High-energy Cosmic-Ray Proton Spectrum from the ISS-CREAM Experiment - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Astrophys.J. Année : 2022

Measurement of High-energy Cosmic-Ray Proton Spectrum from the ISS-CREAM Experiment

Résumé

The Cosmic Ray Energetics And Mass for the International Space Station (ISS-CREAM) experiment successfully recorded data for 539 days from 2017 August to 2019 February. We report the energy spectrum of cosmic-ray protons from the ISS-CREAM experiment at energies from 1.60 × 10$^{3}$ to 6.55 × 10$^{5}$ GeV. The measured spectrum deviates from a single power law. A smoothly broken power-law fit to the data, including statistical and systematic uncertainties, shows the spectral index change at 9.0 × 10$^{3}$ GeV from 2.57 ± 0.03 to 2.82 ± 0.02 with a significance of greater than 3σ. This bump-like structure is consistent with a spectral softening recently reported by the balloon-borne CREAM, DAMPE, and NUCLEON, but ISS-CREAM extends measurements to higher energies.

Dates et versions

hal-03875631 , version 1 (28-11-2022)

Identifiants

Citer

G.H. Choi, E.S. Seo, S. Aggarwal, Y. Amare, D. Angelaszek, et al.. Measurement of High-energy Cosmic-Ray Proton Spectrum from the ISS-CREAM Experiment. Astrophys.J., 2022, 940 (2), pp.107. ⟨10.3847/1538-4357/ac9d2c⟩. ⟨hal-03875631⟩
26 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More