Albert A, Alfaro R, Alvarez C, Arteaga-Velázquez J C, Avila Rojas D, Ayala Solares H A, Babu R, Belmont-Moreno E, Brisbois C, Caballero-Mora K S, Capistrán T, Carramiñana A, Casanova S, Chaparro-Amaro O, Cotti U, Cotzomi J, Coutiño de León S, De la Fuente E, Diaz Hernandez R, Dingus B L, DuVernois M A, Durocher M, Díaz-Vélez J C, Ellsworth R W, Engel K, Espinoza C, Fan K L, Fang K, Fernández Alonso M, Fleischhack H, Fraija N, García-González J A, Garfias F, González M M, Goodman J A, Harding J P, Hernandez S, Hinton J, Huang D, Hueyotl-Zahuantitla F, Hüntemeyer P, Iriarte A, Joshi V, Kaufmann S, Lee J, Linnemann J T, Longinotti A L, Luis-Raya G, Malone K, Martinez O, Martínez-Castro J, Matthews J A, Miranda-Romagnoli P, Morales-Soto J A, Moreno E, Mostafá M, Nayerhoda A, Nellen L, Nisa M U, Noriega-Papaqui R, Olivera-Nieto L, Omodei N, Pérez Araujo Y, Pérez-Pérez E G, Rho C D, Rosa-González D, Ruiz-Velasco E, Salazar H, Salazar-Gallegos D, Sandoval A, Schneider M, Serna-Franco J, Smith A J, Son Y, Springer R W, Tibolla O, Tollefson K, Torres I, Torres-Escobedo R, Turner R, Ureña-Mena F, Varela E, Villaseñor L, Wang X, Watson I J, Willox E, Yun-Cárcamo S, Zhou H, de León C, Beacom J F, Linden T, Ng K C Y, Peter A H G, Zhou B
Physics Division, Los Alamos National Laboratory, Los Alamos, NM 87544, USA.
Instituto de F'isica, Universidad Nacional Autónoma de México, Ciudad de Mexico, Mexico.
Phys Rev Lett. 2023 Aug 4;131(5):051201. doi: 10.1103/PhysRevLett.131.051201.
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.
基于高海拔水切伦科夫（HAWC）天文台6.1年的数据，我们报告了首次探测到来自太阳盘面的太电子伏特（TeV）γ射线通量（6.3σ）。0.5 - 2.6 TeV的能谱可以很好地用幂律拟合，即dN/dE = A(E/1 TeV)^{-γ}，其中A = (1.6 ± 0.3)×10^{-12} TeV^{-1} cm^{-2} s^{-1}，γ = 3.62 ± 0.14。该通量显示出与太阳活动强烈的反相关迹象。这些结果扩展了费米大面积望远镜（Fermi-LAT）观测到的来自太阳盘面的明亮、硬伽马射线发射，这似乎是由于银河系强子宇宙射线在太阳大气中的原子核上产生簇射所致。然而，目前的理论模型无法解释太阳磁场如何塑造这些相互作用的细节。因此，HAWC对TeV的探测加深了太阳盘面发射的谜团。
