Estimating the potential of SWGO to measure the composition-dependent behaviour of the CR anisotropy
- the SWGO Collaboration,
- Rodrigo Guedes Lang(Author),
- Paolo Desiati(Author),
- Gwenael Giacinti(Author),
- Samridha Kunwar(Author),
- Andrew M. Taylor(Author)
- Friedrich-Alexander University Erlangen-Nürnberg,
- University of Wisconsin-Madison,
- Shanghai Jiao Tong University,
- Max Planck Institute for Nuclear Physics,
- German Electron Synchrotron,
- University of Lisbon
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Abstract
Current cosmic ray anisotropy experiments have shown a significant swing in both the direction and the amplitude of the dipole at energies around tens of TeV. Due to the charged nature of these particles, and the presence of magnetic fields in our galaxy, an underlying composition-dependent dipole swing is expected. For this reason, combining measurements of the composition and the distribution of arrival directions is essential for unveiling the astrophysical origin of this structure. In this work, we study the potential of the upcoming Southern Wide-field Gamma-ray Observatory (SWGO) in contributing to these anisotropy studies. We present a template-based method developed for reconstructing the number of muons and separating primary cosmic rays. Preliminary resolutions of 5 − 30% in the number of muons and an accuracy of 70 − 90% in the species separation are found. A clear improvement is seen by considering a dedicated muon-counter layer in a detector, highlighting the future potential of SWGO.
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EnglishArticle number
486Journal (Volume, Issue Number)
Proceedings of Science (Volume 444)Publication milestones
- Published - 27/09/2024
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- Scopus: 85212255617
