@misc{10481/106111,
year = {2025},
month = {6},
url = {https://hdl.handle.net/10481/106111},
abstract = {The modulation of low-energy galactic cosmic rays reflects interplanetary magnetic field variations and can provide useful information on solar activity. An array of ground-surface detectors can reveal the secondary particles, which originate from the interaction of cosmic rays with the atmosphere. In this work, we present an investigation of the low-threshold rate (scaler) time series recorded in 16 yr of operation by the Pierre Auger Observatory surface detectors in Malargüe, Argentina. Through an advanced spectral analysis, we detected highly statistically significant variations in the time series with periods ranging from the decadal to the daily scale. We investigate their origin, revealing a direct connection with solar variability. Thanks to their intrinsic very low noise level, the Auger scalers allow a thorough and detailed investigation of the galactic cosmic-ray flux variations in the heliosphere at different timescales and can, therefore, be considered a new proxy of solar variability.},
organization = {Ministerio de Ciencia e Innovación/Agencia Estatal de Investigación (PID2019-105544GB-I00, PID2022-140510NB-I00 and RYC2019-027017-I)},
organization = {Xunta de Galicia (CIGUS Network of Research Centers, Consolidación 2021 GRC GI-2033, ED431C-2021/22 and ED431F-2022/15)},
organization = {Junta de Andalucía (SOMM17/6104/UGR and P18-FR-4314)},
organization = {European Union (Marie Sklodowska-Curie 101065027 and ERDF)},
publisher = {American Astronomical Society},
title = {Scaler Rates from the Pierre Auger Observatory: A New Proxy of Solar Activity},
doi = {10.3847/1538-4357/adccc3},
author = {Abdul Halim, A. and Pierre Auger Collaboration, / and Bueno Villar, Antonio},
}