Measurement of the cosmic ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite
astro-ph.HE
High Energy Astrophysical Phenomena (astro-ph.HE)
DAMPE Collaboration
FOS: Physical sciences
Particle and High Energy Physics
Nuclear and Plasma Physics
530
01 natural sciences
7. Clean energy
520
Physical Sciences
0103 physical sciences
Astrophysics - High Energy Astrophysical Phenomena
Research Articles
DOI:
10.1126/sciadv.aax3793
Publication Date:
2019-09-28T02:15:16Z
AUTHORS (155)
ABSTRACT
The precise measurement of the spectrum protons, most abundant component cosmic radiation, is necessary to understand source and acceleration rays in Milky Way. This work reports ray proton fluxes with kinetic energies from 40 GeV 100 TeV, two a half years data recorded by DArk Matter Particle Explorer (DAMPE). first time an experiment directly measures protons up ~100 TeV high statistics. measured confirms spectral hardening found previous experiments reveals softening at ~13.6 index changing ~2.60 ~2.85. Our result suggests existence new feature lower than so-called knee, sheds light on origin Galactic rays.
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