Discovery of Gamma Rays from the Quiescent Sun with HAWC.
Journal
Physical review letters
ISSN: 1079-7114
Titre abrégé: Phys Rev Lett
Pays: United States
ID NLM: 0401141
Informations de publication
Date de publication:
04 Aug 2023
04 Aug 2023
Historique:
received:
06
12
2022
revised:
27
01
2023
accepted:
23
06
2023
medline:
18
8
2023
pubmed:
18
8
2023
entrez:
18
8
2023
Statut:
ppublish
Résumé
We report the first detection of a TeV γ-ray flux from the solar disk (6.3σ), based on 6.1 years of data from the High Altitude Water Cherenkov (HAWC) observatory. The 0.5-2.6 TeV spectrum is well fit by a power law, dN/dE=A(E/1 TeV)^{-γ}, with A=(1.6±0.3)×10^{-12} TeV^{-1} cm^{-2} s^{-1} and γ=3.62±0.14. The flux shows a strong indication of anticorrelation with solar activity. These results extend the bright, hard GeV emission from the disk observed with Fermi-LAT, seemingly due to hadronic Galactic cosmic rays showering on nuclei in the solar atmosphere. However, current theoretical models are unable to explain the details of how solar magnetic fields shape these interactions. HAWC's TeV detection thus deepens the mysteries of the solar-disk emission.
Identifiants
pubmed: 37595214
doi: 10.1103/PhysRevLett.131.051201
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM