0 citations0 references

Measurement of Ultra-High-Energy Diffuse Gamma-Ray Emission of the Galactic Plane from 10 TeV to 1 PeV with LHAASO-KM2A

Physical Review Letters2023Vol. 131(15), pp. 151001–151001

Citations Over TimeTop 1% of 2023 papers

Z. Cao, F. Aharonian, Q. An, Axikegu, Y. Bai, Y. W. Bao, D. Bastieri, Xiao-Jun Bi, Y. J. Bi, J. T. Cai, Qin Cao, Weiwei Cao, Zhe Cao, J. F. Chang, J. F. Chang, A. M. Chen, E. S. Chen, Liang Chen, Lin Chen, Long Chen, M. J. Chen, M. L. Chen, Q. H. Chen, S. H. Chen, S. Z. Chen, T. L. Chen, Yang Chen, Ning Cheng, Y. D. Cheng, Maxwell Cui, S. W. Cui, X. H. Cui, Yongde Cui, B. Z. Dai, H. L. Dai, Z. G. Dai, Danzengluobu Danzengluobu, D. della Volpe, X. Q. Dong, K. K. Duan, J. H. Fan, Y. Z. Fan, Jun Fang, Kun Fang, Chunsheng Feng, Lei Feng, F. Shi, X. T. Feng, Y. L. Feng, S. Gabici, Bo Gao, C. D. Gao, L. Q. Gao, Qinhe Gao, Wei Gao, W. K. Gao, M. M. Ge, Li‐Sheng Geng, Gwenael Giacinti, G. H. Gong, Q. B. Gou, M. H. Gu, Fulai Guo, Xiaolong Guo, Y. Q. Guo, Y. Y. Guo, Y. A. Han, Han He, Hao-Ning He, Jiayu He, X. B. He, Y. He, Matthieu Heller, Y. K. Hor, B. W. Hou, C. Hou, X. T. Hou, H. B. Hu, Qiang Hu, S. C. Hu, D. H. Huang, T. Q. Huang, W. J. Huang, X. T. Huang, X. Y. Huang, Y. Huang, Z. C. Huang, X. L. Ji, H. Y. Jia, Ke Jia, K. Jiang, X. W. Jiang, Z. J. Jiang, Ming Jin, M. M. Kang, T. Ke, D. Kuleshov, K. Kurinov, B. B. Li, Cheng Li, Cong Li, Di Li, Li Fei, H. B. Li, Hancheng Li, H. Y. Li, Jian Li, Jian Li, Jie Li, K. Li, W.L Li, W.L Li, X. R. Li, Xin Li, Yunyun Li, Zhe Li, Zhuo Li, En‐Wei Liang, Liang Yu, S. J. Lin, Bing Liu, Cuiping Liu, D. Liu, Haichao Liu, H. D. Liu, J. Liu, Jianglai Liu, Jiarui Liu, Mao-Yan Liu, Rui Liu, S. M. Liu, W. Liu, Yi Liu, Yinong Liu, R. Lu, Q. Luo, H. K. Lv, B. Q., L. Li, Xinhua Ma, J. R. Mao, M. Zha, W. Mitthumsiri, Hui-Jun Mu, Y. C. Nan, A. Neronov, Z. W. Ou, B. Y. Pang, P. Pattarakijwanich, Z. Y. Pei, M. Qi, Y. Q. Qi, Bing-Qiang Qiao, Jiajun Qin, D. Ruffolo, A. Sáiz, D. Semikoz, C. Y. Shao, L. Shao, O. Shchegolev, X. D. Sheng, Fengchun Shu, H. C. Song, Yu. V. Stenkin, V. Stepanov, Yang Su, Q. N. Sun, X. N. Sun, Z. B. Sun, P. H. T. Tam, Qi-jie Tang, Z. Tang, Wenwu Tian, C. Wang, Chuxuan Wang, Guofeng Wang, H. G. Wang, H. H. Wang, J. C. Wang, K Wang, Longjun Wang, L. Y. Wang, Pei Wang, R. Wang, Wei Wang, Xiang-Gao Wang, X. Y. Wang, Yang Wang, Y. D. Wang, Y. J. Wang, Z. H. Wang, Z. X. Wang, Zhen Wang, Z. Wang, D. M. Wei, J. J. Wei, Y. J. Wei, Tao Wen, C. Y. Wu, H. R. Wu, S. Wu, X. F. Wu, Y. S. Wu, S. Q. Xi, J. Xia, J. Xia, G. M. Xiang, D. X. Xiao, G. Xiao, G. G. Xin, Y. Xin, Y. Xing, Xiong Zhang, D. L. Xu, Rong Xu, Rong Xu, W. L. Xu, W. Xu, Dahai Yan, Jun Yan, T Yan, C. W. Yang, Fang Yang, Fang Yang, Hongli Yang, Jiaqi Yang, Lili Yang, Min Yang, Rui Yang, S. B. Yang, Yuhua Yao, Z. G. Yao, Y. M. Ye, Lina Yin, N. Yin, X. H. You, Z. Y. You, Y. H. Yu, Qiang Yuan, Hui Yue, Hui‐Yi Zeng, T. X. Zeng, W. Zeng, M. Zha, B. B. Zhang, Fan Zhang, Hai-Ming Zhang, H. Y. Zhang, J. L. Zhang, Li Zhang, Li Zhang, P. F. Zhang, Peter Zhang, Rui Zhang, Songbo Zhang, S. R. Zhang, S.S Zhang, Xiong Zhang, X. P. Zhang, Y. F. Zhang, Yi Zhang, Yong Zhang, Bing Zhao, Jie Zhao, Lei Zhao, Lei Zhao, S. P. Zhao, F. Zheng, Bin Zhou, H. Zhou, J. N. Zhou, N. Zhou, Ping Zhou, Rong Zhou, X. X. Zhou, C. G. Zhu, F. R. Zhu, H. Zhu, Kai Zhu, X. Zuo

Abstract

The diffuse Galactic γ-ray emission, mainly produced via interactions between cosmic rays and the interstellar medium and/or radiation field, is a very important probe of the distribution, propagation, and interaction of cosmic rays in the Milky Way. In this Letter, we report the measurements of diffuse γ rays from the Galactic plane between 10 TeV and 1 PeV energies, with the square kilometer array of the Large High Altitude Air Shower Observatory (LHAASO). Diffuse emissions from the inner (15°10 TeV). The energy spectrum in the inner Galaxy regions can be described by a power-law function with an index of -2.99±0.04, which is different from the curved spectrum as expected from hadronic interactions between locally measured cosmic rays and the line-of-sight integrated gas content. Furthermore, the measured flux is higher by a factor of ∼3 than the prediction. A similar spectrum with an index of -2.99±0.07 is found in the outer Galaxy region, and the absolute flux for 10≲E≲60 TeV is again higher than the prediction for hadronic cosmic ray interactions. The latitude distributions of the diffuse emission are consistent with the gas distribution, while the longitude distributions show clear deviation from the gas distribution. The LHAASO measurements imply that either additional emission sources exist or cosmic ray intensities have spatial variations.

Related Papers

→ The Smith Cloud: A High-Velocity Cloud Colliding with the Milky Way(2008)101 cited
→ The Ratan Galactic Plane Survey(1997)
→ The Ratan Galactic Plane Survey(1998)
Molecular clouds and star formation in the Milky Way(2018)
→ Phases of the Interstellar Medium in the Milky Way(1997)