W51复合体中接近PeV能量粒子加速的证据
高能天体物理现象
2026-01-07 v3 高能物理 - 实验
摘要
W51复合体的 射线辐射被广泛认为源于超新星遗迹（SNR）W51C激波加速的宇宙射线（CRs）与相邻恒星形成区W51B中致密分子云的相互作用。然而，W51C对CRs的最大加速能力仍不明确。基于大型高海拔空气簇射观测站（LHAASO）的观测，我们报告了对来自W51复合体、能量从2 TeV到200 TeV的 射线的显著探测。LHAASO的测量首次将W51复合体的 射线辐射扩展至100 TeV以上，并揭示了在数十TeV处显著的光谱弯曲。结合Fermi-LAT具有“ 衰变凸起”特征的数据，W51区域的宽带 射线光谱可以很好地用简单的 pp 碰撞模型表征。观测到的光谱弯曲特征表明，CR质子光谱在约400 TeV处存在指数截止，或在约200 TeV处存在幂律断裂，这极有可能是SNR作为接近PeV能区CR加速器的首个证据。此外，W51B内的两个年轻星团在理论上也可能产生LHAASO观测到的最高能 射线。我们的发现有力地支持了W51复合体内存在极端CR加速器，并为银河系CR的起源提供了新见解。
引用
@article{arxiv.2407.00624,
title = {Evidence for particle acceleration approaching PeV energies in the W51 complex},
author = {The LHAASO Collaboration and Zhen Cao and F. Aharonian and Axikegu and Y. X. Bai and Y. W. Bao and D. Bastieri and X. J. Bi and Y. J. Bi and W. Bian and A. V. Bukevich and Q. Cao and W. Y. Cao and Zhe Cao and J. Chang and J. F. Chang and M. Chen and E. S. Chen and H. X. Chen and Liang Chen and Lin Chen and Long Chen and M. J. Chen and M. L. Chen and Q. H. Chen and S. Chen and S. H. Chen and S. Z. Chen and T. L. Chen and Y. Chen and N. Cheng and Y. D. Cheng and M. Y. Cui and S. W. Cui and X. H. Cui and Y. D. Cui and B. Z. Dai and H. L. Dai and Z. G. Dai and Danzengluobu and X. Q. Dong and K. K. Duan and J. H. Fan and Y. Z. Fan and J. Fang and J. H. Fang and K. Fang and C. F. Feng and H. Feng and L. Feng and S. H. Feng and X. T. Feng and Y. Feng and Y. L. Feng and S. Gabici and B. Gao and C. D. Gao and Q. Gao and W. Gao and W. K. Gao and M. M. Ge and L. S. Geng and G. Giacinti and G. H. Gong and Q. B. Gou and M. H. Gu and F. L. Guo and X. L. Guo and Y. Q. Guo and Y. Y. Guo and Y. A. Han and M. Hasan and H. H. He and H. N. He and J. Y. He and Y. He and Y. K. Hor and B. W. Hou and C. Hou and X. Hou and H. B. Hu and Q. Hu and S. C. Hu and D. H. Huang and T. Q. Huang and W. J. Huang and X. T. Huang and X. Y. Huang and Y. Huang and X. L. Ji and H. Y. Jia and K. Jia and K. Jiang and X. W. Jiang and Z. J. Jiang and M. Jin and M. M. Kang and I. Karpikov and D. Kuleshov and K. Kurinov and B. B. Li and C. M. Li and Cheng Li and Cong Li and D. Li and F. Li and H. B. Li and H. C. Li and Jian Li and Jie Li and K. Li and S. D. Li and W. L. Li and W. L. Li and X. R. Li and Xin Li and Y. Z. Li and Zhe Li and Zhuo Li and E. W. Liang and Y. F. Liang and S. J. Lin and B. Liu and C. Liu and D. Liu and D. B. Liu and H. Liu and H. D. Liu and J. Liu and J. L. Liu and M. Y. Liu and R. Y. Liu and S. M. Liu and W. Liu and Y. Liu and Y. N. Liu and Q. Luo and Y. Luo and H. K. Lv and B. Q. Ma and L. L. Ma and X. H. Ma and J. R. Mao and Z. Min and W. Mitthumsiri and H. J. Mu and Y. C. Nan and A. Neronov and L. J. Ou and P. Pattarakijwanich and Z. Y. Pei and J. C. Qi and M. Y. Qi and B. Q. Qiao and J. J. Qin and A. Raza and D. Ruffolo and A. Sáiz and M. Saeed and D. Semikoz and L. Shao and O. Shchegolev and X. D. Sheng and F. W. Shu and H. C. Song and Yu. V. Stenkin and V. Stepanov and Y. Su and D. X. Sun and Q. N. Sun and X. N. Sun and Z. B. Sun and J. Takata and P. H. T. Tam and Q. W. Tang and R. Tang and Z. B. Tang and W. W. Tian and C. Wang and C. B. Wang and G. W. Wang and H. G. Wang and H. H. Wang and J. C. Wang and Kai Wang and Kai Wang and L. P. Wang and L. Y. Wang and P. H. Wang and R. Wang and W. Wang and X. G. Wang and X. Y. Wang and Y. Wang and Y. D. Wang and Y. J. Wang and Z. H. Wang and Z. X. Wang and Zhen Wang and Zheng Wang and D. M. Wei and J. J. Wei and Y. J. Wei and T. Wen and C. Y. Wu and H. R. Wu and Q. W. Wu and S. Wu and X. F. Wu and Y. S. Wu and S. Q. Xi and J. Xia and G. M. Xiang and D. X. Xiao and G. Xiao and Y. L. Xin and Y. Xing and D. R. Xiong and Z. Xiong and D. L. Xu and R. F. Xu and R. X. Xu and W. L. Xu and L. Xue and D. H. Yan and J. Z. Yan and T. Yan and C. W. Yang and C. Y. Yang and F. Yang and F. F. Yang and L. L. Yang and M. J. Yang and R. Z. Yang and W. X. Yang and Y. H. Yao and Z. G. Yao and L. Q. Yin and N. Yin and X. H. You and Z. Y. You and Y. H. Yu and Q. Yuan and H. Yue and H. D. Zeng and T. X. Zeng and W. Zeng and M. Zha and B. B. Zhang and F. Zhang and H. Zhang and H. M. Zhang and H. Y. Zhang and J. L. Zhang and Li Zhang and P. F. Zhang and P. P. Zhang and R. Zhang and S. B. Zhang and S. R. Zhang and S. S. Zhang and X. Zhang and X. P. Zhang and Y. F. Zhang and Yi Zhang and Yong Zhang and B. Zhao and J. Zhao and L. Zhao and L. Z. Zhao and S. P. Zhao and X. H. Zhao and F. Zheng and W. J. Zhong and B. Zhou and H. Zhou and J. N. Zhou and M. Zhou and P. Zhou and R. Zhou and X. X. Zhou and X. X. Zhou and B. Y. Zhu and C. G. Zhu and F. R. Zhu and H. Zhu and K. J. Zhu and Y. C. Zou and X. Zuo and S. Celli},
journal= {arXiv preprint arXiv:2407.00624},
year = {2026}
}