Constraining ultra-high-energy cosmic ray composition through cross-correlations

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00567331" target="_blank" >RIV/68378271:_____/22:00567331 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1088/1475-7516/2022/12/003" target="_blank" >https://doi.org/10.1088/1475-7516/2022/12/003</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2022/12/003" target="_blank" >10.1088/1475-7516/2022/12/003</a>

Result language
angličtina
Original language name
Constraining ultra-high-energy cosmic ray composition through cross-correlations
Original language description
The chemical composition of the highest end of the ultra-high-energy cosmic ray spectrum is very hard to measure experimentally, and to this day it remains mostly unknown. Since the trajectories of ultra-high-energy cosmic rays are deflected in the magnetic field of the Galaxy by an angle that depends on their atomic number Z, it could be possible to indirectly measure Z by quantifying the amount of such magnetic deflections. In this paper we show that, using the angular harmonic cross-correlation between ultra-high-energy cosmic rays and galaxies, we could effectively distinguish different atomic numbers with current data. As an example, we show how, if Z = 1, the cross-correlation can exclude a 39% fraction of Fe56 nuclei at 2σ for rays above 100 EeV.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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