Measurement of Very-High-Energy Diffuse Gamma-Ray Emissions from the Galactic Plane with LHAASO-WCDA

作者：Z. Cao, F Aharonian, Axikegu, Y. Bai, Y. W. Bao, D. Bastieri, Xiao-Jun Bi, Y. J. Bi, Weixin Bian, A.V Bukevich, Qin Cao, Weiwei Cao, Zhe Cao, J. F. Chang, J. F. Chang, A. M. Chen, E. S. Chen, H. X. Chen, Liang Chen, Lin Chen, Long Chen, M. J. Chen, M. L. Chen, Qi-Hui Chen, S. Chen, S. H. Chen, S. Z. Chen, T. L. Chen, Y. Chen, Ning Cheng, Y. D. Cheng, M. C. Chu, Maxwell Cui, S. W. Cui, X. H. Cui, Y. D. Cui, B. Z. Dai, H. L. Dai, Z. G. Dai, Danzengluobu, X. Q. Dong, K. K. Duan, J. H. Fan, Yichen Fan, J. Fang, J. Fang, Kwok Lung Fan, Cong Feng, Haoran Feng, L. Feng, S. H. Feng, X. T. Feng, Yuliang Feng, Y. L. Feng, S. Gabici, Bo Gao, Chuyue Gao, Qi Gao, Wei Gao, W. K. Gao, M. M. Ge, T.T Ge, Li‐Sheng Geng, Gwenael Giacinti, G. H. Gong, Q. B. Gou, M. H. Gu, Fulai Guo, J. Y. Guo, Xiaoguang Guo, Y. Q. Guo, Y. Y. Guo, Y. A. Han, O. A. Hannuksela, M. Zahid Hasan, H.H He, H. N. He, Jiawei He, Y. He, Y. K. Hor, B. W. Hou, C. Hou, Xianglin Hou, H. B. Hu, Qiang Hu, S. C. Hu, Chun-Hao P. Huang, Dezhi Huang, T. Q. Huang, W. J. Huang, X. T. Huang, X. Y. Huang, Yang Yu, Y. Y. Huang, X. L. Ji, H.Y Jia, Ke Jia, H. B. Jiang, K. Jiang, X. W. Jiang, Z. J. Jiang, Ming Jin, M. M. Kang, I. Karpikov, D. Khangulyan, D. Kuleshov, K. Kurinov, B. B. Li, C. M. Li, Cheng Li, Cong Li, Dan Li, Li Fei, H. B. Li, Huicai Li, Jian Li, Jie Li, K. Li, Shaoquan Li, W.L Li, W.L Li, X. R. Li, Xin Li, Yuze Li, Zhe Li, Zhuo Li, En-Wei Liang, Yun-Feng Liang, Shangrong Lin, Beige Liu, C. Liu, D. Liu, D. B. Liu, H. Liu, H. D. Liu, Jifeng Liu, J. L. Liu, Manfei Liu, Rui Liu, S. M. Liu, W. Liu, Yun‐Lin Liu, Y. N. Liu, Q. Luo, Yangping Luo, H. K. Lv, B. Q., L. L., Xinhua Ma, J. R. Mao, Z. Min, W. Mitthumsiri, Hui-Jun Mu, Y. C. Nan, A. Neronov, Kenny C. Y. Ng, Lijun Ou, P. Pattarakijwanich, Zhichao Pei, J.C Qi, M. Qi, Bing-Qiang Qiao, J. J. Qin, Ali Raza, D. Ruffolo, A. Sáiz, M. A. Saeed, D. Semikoz, Lijing Shao, O. Shchegolev, X. D. Sheng, Fengchun Shu, H. C. Song, Yu. V. Stenkin, V. Stepanov, Yang Su, Danfeng Sun, Q. N. Sun, X. N. Sun, Zhihao Sun, J. Takata, P. H. T. Tam, Qing-Wen Tang, Rujun Tang, Z. B. Tang, W. W. Tian, L. H. Wan, C. Wang, Chuxuan Wang, Guomin Wang, H. G. Wang, H. H. Wang, J. C. Wang, Kai Wang, Kai Wang, Longjun Wang, L. Y. Wang, P. H. Wang, Rong Wang, Wei Wang, X. G. Wang, X. Y. Wang, Z. Wang, Y. D. Wang, Y. J. Wang, Z. H. Wang, Z. X. Wang, Zhen Wang, Z. Wang, D. M. Wei, Jun-Jie Wei, Y. J. Wei, Tao Wen, C. Y. Wu, H. R. Wu, Q. W. Wu, S. Wu, Xue-Feng Wu, Y. S. Wu, S. Q. Xi, Jun‐Qing Xia, G. M. Xiang, D. X. Xiao, G. Xiao, Y. L. Xin, Y. Xing, Dingrong Xiong, Z. Xiong, D.L Xu, R. F. Xu, R. X. Xu, Weiyun Xu, W. Xu, D. H. Yan, Jing‐Zhi Yan, T Yan, Chaoran Yang, Chuyuan Yang, Fan Yang, Fang Yang, Lili Yang, Min Yang, Rui Yang, W. X. Yang, Yuhua Yao, Z. G. Yao, Lina Yin, N. Yin, X. H. You, Z. Y. You, Y.H. Yu, Q. Yuan, Hui Yue, Hui‐Yi Zeng, T. X. Zeng, W. Zeng, M. Zha, B. B. Zhang, Fan Zhang, Hongwei Zhang, H. M. Zhang, Hengying Zhang, J. L. Zhang, Lu Zhang, P. F. Zhang, P. P. Zhang, R. Zhang, S. B. Zhang, S. R. Zhang, S.S Zhang, X. Zhang, Xu Zhang, Y. F. Zhang, Yi Zhang, Yong‐Wei Zhang, Bowen Zhao, Jie Zhao, Lei Zhao, Linlin Zhao, S. P. Zhao, Xiaohong Zhao, Fa‐Kun Zheng, W. J. Zhong, Bin Zhou, Hong‐Cai Zhou, J. N. Zhou, Meng Zhou, P. Zhou, R. Zhou, Xuyang Zhou, Xuyang Zhou, Baohua Zhu, C. G. Zhu, F. R. Zhu, Haifeng Zhu, K. J. Zhu, Yuan-Chuan Zou, Xuzhong Zuo · 发表于：Physical Review Letters · 年份：2025 · DOI：10.1103/physrevlett.134.081002 · 被引用次数：26 · 研究领域：Astrophysics and Cosmic Phenomena、Dark Matter and Cosmic Phenomena、Neutrino Physics Research

The diffuse Galactic gamma-ray emission is a very important tool used to study the propagation and interaction of cosmic rays in the Milky Way. In this Letter, we report the measurements of the diffuse emission from the Galactic plane---covering Galactic longitudes from 15\ifmmode^\circ\else\textdegree\fi{} to 235\ifmmode^\circ\else\textdegree\fi{} and latitudes from $\ensuremath{-}5\ifmmode^\circ\else\textdegree\fi{}$ to $+5\ifmmode^\circ\else\textdegree\fi{}$, in an energy range of 1 to 25 TeV---made with the Water Cherenkov Detector Array (WCDA) of the Large High Altitude Air Shower Observatory. After the sky regions of known sources are masked, the diffuse emission is detected with $24.6\ensuremath{\sigma}$ and $9.1\ensuremath{\sigma}$ significance in the inner Galactic plane ($15\ifmmode^\circ\else\textdegree\fi{}<l<125\ifmmode^\circ\else\textdegree\fi{}$, $|b|<5\ifmmode^\circ\else\textdegree\fi{}$) and outer Galactic plane ($125\ifmmode^\circ\else\textdegree\fi{}<l<235\ifmmode^\circ\else\textdegree\fi{}$, $|b|<5\ifmmode^\circ\else\textdegree\fi{}$), respectively. The WCDA spectra in both regions can be well described by a power-law function, with spectral indices of $\ensuremath{-}2.67\ifmmode\pm\else\textpm\fi{}0.0{5}_{\mathrm{stat}}$ in the inner region and $\ensuremath{-}2.83\ifmmode\pm\else\textpm\fi{}0.1{9}_{\mathrm{stat}}$ in the outer region, respectively. Combined with the Square Kilometer Array (KM2A) measurements at higher energies, a clear s...