Detection of the Temporal Variation of the Sun's Cosmic Ray Shadow with the IceCube Detector
Name
Aartsen_2019_ApJ_872_133.pdf
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7.16 MB
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Checksum (MD5)
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Author(s)
Arguelles Delgado, Carlos A
Axani, Spencer Nicholas
Collin, G. H.
Conrad, Janet Marie
Moulai, Marjon H.
Date Issued
February 2019
Journal
Astrophysical Journal
Publisher
IOP Publishing
Citation
Aartsen, M. G. et al. “Detection of the Temporal Variation of the Sun’s Cosmic Ray Shadow with the IceCube Detector.” The Astrophysical Journal 872, 2 (February 2019): 133.
Version
Final published version
Abstract
We report on the observation of a deficit in the cosmic ray flux from the directions of the Moon and Sun with five years of data taken by the IceCube Neutrino Observatory. Between 2010 May and 2011 May the IceCube detector operated with 79 strings deployed in the glacial ice at the South Pole, and with 86 strings between 2011 May and 2015 May. A binned analysis is used to measure the relative deficit and significance of the cosmic ray shadows. Both the cosmic ray Moon and Sun shadows are detected with high statistical significance (>10σ) for each year. The results for the Moon shadow are consistent with previous analyses and verify the stability of the IceCube detector over time. This work represents the first observation of the Sun shadow with the IceCube detector. We show that the cosmic ray shadow of the Sun varies with time. These results make it possible to study cosmic ray transport near the Sun with future data from IceCube.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.3847/1538-4357/aaffd1
