Does or did the supernova remnant Cassiopeia A operate as a PeVatron?
High Energy Astrophysical Phenomena
2023-10-27 v1
Abstract
For decades, supernova remnants (SNRs) have been considered the prime sources of Galactic Cosmic rays (CRs). But whether SNRs can accelerate CR protons to PeV energies and thus dominate CR flux up to the knee is currently under intensive theoretical and phenomenological debate. The direct test of the ability of SNRs to operate as CR PeVatrons can be provided by ultrahigh-energy (UHE; ~TeV) -rays. In this context, the historical SNR Cassiopeia A (Cas A) is considered one of the most promising target for UHE observations. This paper presents the observation of Cas A and its vicinity by the LHAASO KM2A detector. The exceptional sensitivity of LHAASO KM2A in the UHE band, combined with the young age of Cas A, enabled us to derive stringent model-independent limits on the energy budget of UHE protons and nuclei accelerated by Cas A at any epoch after the explosion. The results challenge the prevailing paradigm that Cas A-type SNRs are major suppliers of PeV CRs in the Milky Way.
Keywords
Cite
@article{arxiv.2310.17082,
title = {Does or did the supernova remnant Cassiopeia A operate as a PeVatron?},
author = {Zhen Cao and F. Aharonian and Q. An and Axikegu and Y. X. Bai and Y. W. Bao and D. Bastieri and X. J. Bi and Y. J. Bi and J. T. Cai and Q. Cao and W. Y. Cao and Zhe Cao and J. Chang and J. F. Chang and A. M. Chen and E. S. Chen and Liang Chen and Lin Chen and Long Chen and M. J. Chen and M. L. Chen and Q. H. 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 D. della Volpe and X. Q. Dong and K. K. Duan and J. H. Fan and Y. Z. Fan and J. Fang and K. Fang and C. F. Feng and L. Feng and S. H. Feng and X. T. Feng and Y. L. Feng and S. Gabici and B. Gao and C. D. Gao and L. Q. 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 H. H. He and H. N. He and J. Y. He and X. B. He and Y. He and M. Heller 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 Z. C. 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 T. Ke and D. Kuleshov and K. Kurinov and B. B. Li and Cheng Li and Cong Li and D. Li and F. Li and H. B. Li and H. C. Li and H. Y. Li and J. Li and Jian Li and Jie Li and K. 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 H. Liu and H. D. Liu and J. Liu and J. L. Liu and J. Y. Liu and M. Y. Liu and R. Y. Liu and S. M. Liu and W. Liu and Y. Liu and Y. N. Liu and R. Lu and Q. 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 Z. W. Ou and B. Y. Pang and P. Pattarakijwanich and Z. Y. Pei and M. Y. Qi and Y. Q. Qi and B. Q. Qiao and J. J. Qin and D. Ruffolo and A. Sáiz and D. Semikoz and C. Y. Shao 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 Q. N. Sun and X. N. Sun and Z. B. Sun and P. H. T. Tam and Q. W. 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 K. 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 S. Wu and X. F. Wu and Y. S. Wu and S. Q. Xi and J. Xia and J. J. Xia and G. M. Xiang and D. X. Xiao and G. Xiao and G. G. Xin and Y. L. Xin and Y. Xing 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 F. Yang and F. F. Yang and H. W. Yang and J. Y. Yang and L. L. Yang and M. J. Yang and R. Z. Yang and S. B. Yang and Y. H. Yao and Z. G. Yao and Y. M. Ye 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. M. Zhang and H. Y. Zhang and J. L. Zhang and L. X. 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 F. Zheng and B. Zhou and H. Zhou and J. N. Zhou and M. Zhou and P. Zhou and R. Zhou and X. X. Zhou and C. G. Zhu and F. R. Zhu and H. Zhu and K. J. Zhu and X. Zuo.},
journal= {arXiv preprint arXiv:2310.17082},
year = {2023}
}
Comments
11 pages, 3 figures, Accepted by the APJL