TY - JOUR
T1 - Discovery of Gamma Rays from the Quiescent Sun with HAWC
AU - (HAWC Collaboration)
AU - Albert, A.
AU - Alfaro, R.
AU - Alvarez, C.
AU - Arteaga-Velázquez, J. C.
AU - Avila Rojas, D.
AU - Ayala Solares, H. A.
AU - Babu, R.
AU - Belmont-Moreno, E.
AU - Brisbois, C.
AU - Caballero-Mora, K. S.
AU - Capistrán, T.
AU - Carramiñana, A.
AU - Casanova, S.
AU - Chaparro-Amaro, O.
AU - Cotti, U.
AU - Cotzomi, J.
AU - Coutiño De León, S.
AU - De La Fuente, E.
AU - Diaz Hernandez, R.
AU - Dingus, B. L.
AU - Duvernois, M. A.
AU - Durocher, M.
AU - Díaz-Vélez, J. C.
AU - Ellsworth, R. W.
AU - Engel, K.
AU - Espinoza, C.
AU - Fan, K. L.
AU - Fang, K.
AU - Fernández Alonso, M.
AU - Fleischhack, H.
AU - Fraija, N.
AU - García-González, J. A.
AU - Garfias, F.
AU - González, M. M.
AU - Goodman, J. A.
AU - Harding, J. P.
AU - Hernandez, S.
AU - Hinton, J.
AU - Huang, D.
AU - Hueyotl-Zahuantitla, F.
AU - Hüntemeyer, P.
AU - Iriarte, A.
AU - Joshi, V.
AU - Kaufmann, S.
AU - Lee, J.
AU - Linnemann, J. T.
AU - Longinotti, A. L.
AU - Luis-Raya, G.
AU - Malone, K.
AU - Mostafá, M.
N1 - Publisher Copyright:
© 2023 American Physical Society.
PY - 2023/8/4
Y1 - 2023/8/4
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.131.051201
DO - 10.1103/PhysRevLett.131.051201
M3 - Article
C2 - 37595214
AN - SCOPUS:85167873938
SN - 0031-9007
VL - 131
JO - Physical review letters
JF - Physical review letters
IS - 5
M1 - 051201
ER -