Determination of the anisotropy of elementary particles with the Alpha Magnetic Spectrometer on the International Space Station

Velasco, Miguel Ángel; Casaus, Jorge; Molero, Miguel
Bibliographical reference

Advances in Space Research

Advertised on:
11
2024
Number of authors
3
IAC number of authors
1
Citations
0
Refereed citations
0
Description
A measurement of the cosmic ray anisotropy on the arrival directions of elementary particles (electrons, positrons and protons) has been performed in galactic coordinates by the Alpha Magnetic Spectrometer onboard the International Space Station. The analysis is based on the sample of events collected in the first 10 years of data taking. The results are consistent with isotropy for all cosmic ray species and upper limits on the dipole amplitude have been computed. In particular, 95% credible interval upper limits of δ<1.50% and δ<0.34% are obtained for positrons and electrons, respectively, above 16 GeV. On the other hand, the upper limit to the dipole anisotropy of protons above 200 GV is found to be δ<0.30%.