Ultra-high-energy $γ$-ray emission associated with the tail of a bow-shock pulsar wind nebula
Creators: name: Cao, Zhen
name: Aharonian, F.
name: Bai, Y. X.
name: Bao, Y. W.
name: Bastieri, D.
name: Bi, X. J.
name: Bi, Y. J.
name: Bian, W.
name: Bukevich, A. V.
name: Cai, C. M.
name: Cao, W. Y.
name: Cao, Zhe
name: Chang, J.
name: Chang, J. F.
name: Chen, A. M.
name: Chen, E. S.
name: Chen, H. X.
name: Chen, Liang
name: Chen, Long
name: Chen, M. J.
name: Chen, M. L.
name: Chen, Q. H.
name: Chen, S.
name: Chen, S. H.
name: Chen, S. Z.
name: Chen, T. L.
name: Chen, X. B.
name: Chen, X. J.
name: Chen, Y.
name: Cheng, N.
name: Cheng, Y. D.
name: Chu, M. C.
name: Cui, M. Y.
name: Cui, S. W.
name: Cui, X. H.
name: Dai, Y. D. Cui B. Z.
name: Dai, H. L.
name: Dai, Z. G.
name: Danzengluobu
name: Diao, Y. X.
name: Dong, X. Q.
name: Duan, K. K.
name: Fan, J. H.
name: Fan, Y. Z.
name: Fang, J.
name: Fang, J. H.
name: Fang, K.
name: Feng, C. F.
name: Feng, H. Feng L.
name: Feng, S. H.
name: Feng, X. T.
name: Feng, Y.
name: Feng, Y. L.
name: Gabici, S.
name: Gao, B.
name: Gao, C. D.
name: Gao, Q.
name: Gao, W.
name: Gao, W. K.
name: Ge, M. M.
name: Geng, T. T. Ge L. S.
name: Giacinti, G.
name: Gong, G. H.
name: Gou, Q. B.
name: Gu, M. H.
name: Guo, F. L.
name: Guo, J.
name: Guo, X. L.
name: Guo, Y. Q.
name: Guo, Y. Y.
name: Han, Y. A.
name: Hannuksela, O. A.
name: Hasan, M.
name: He, H. H.
name: He, H. N.
name: He, J. Y.
name: He, X. Y.
name: He, Y.
name: Hernández-Cadena, S.
name: Hou, Y. K. Hor B. W.
name: Hou, C.
name: Hou, X.
name: Hu, H. B.
name: Hu, S. C.
name: Huang, C.
name: Huang, D. H.
name: Huang, J. J.
name: Huang, T. Q.
name: Huang, W. J. Huang X. T.
name: Huang, X. Y.
name: Huang, Y.
name: Huang, Y. Y.
name: Ji, X. L.
name: Jia, H. Y.
name: Jia, K.
name: Jiang, H. B.
name: Jiang, K.
name: Jiang, X. W.
name: Jiang, Z. J.
name: Jin, M.
name: Kaci, S.
name: Kang, M. M.
name: Karpikov, I.
name: Khangulyan, D.
name: Kuleshov, D.
name: Kurinov, K.
name: Li, B. B.
name: Li, Cheng
name: Li, Cong
name: Li, D.
name: Li, F.
name: Li, H. B.
name: Li, H. C.
name: Li, Jian
name: Li, Jie
name: Li, K.
name: Li, L.
name: Li, R. L.
name: Li, S. D.
name: Li, T. Y.
name: Li, W. L.
name: Li, X. R.
name: Li, Xin
name: Li, Y. Z.
name: Li, Zhe
name: Li, Zhuo
name: Liu, E. W. Liang Y. F. Liang S. J. Lin B.
name: Liu, C.
name: Liu, D.
name: Liu, D. B.
name: Liu, H.
name: Liu, H. D.
name: Liu, J.
name: Liu, J. L.
name: Liu, J. R.
name: Liu, M. Y.
name: Liu, R. Y.
name: Liu, S. M.
name: Liu, W.
name: Liu, X.
name: Liu, Y.
name: Liu, Y.
name: Liu, Y. N.
name: Lou, Y. Q.
name: Luo, Q. Luo Y.
name: Lv, H. K.
name: Ma, B. Q.
name: Ma, L. L.
name: Ma, X. H.
name: Mao, J. R.
name: Min, Z.
name: Mitthumsiri, W.
name: Mou, G. B.
name: Mu, H. J.
name: Nan, Y. C.
name: Neronov, A.
name: Ng, K. C. Y.
name: Ni, M. Y.
name: Nie, L.
name: Ou, L. J.
name: Pattarakijwanich, P.
name: Pei, Z. Y.
name: Qi, J. C.
name: Qi, M. Y.
name: Qin, J. J.
name: Raza, A.
name: Ren, C. Y.
name: Ruffolo, D.
name: Sáiz, A.
name: Saeed, M.
name: Semikoz, D.
name: Shao, L.
name: Shchegolev, O.
name: Shen, Y. Z.
name: Sheng, X. D.
name: Shi, Z. D.
name: Shu, F. W.
name: Song, H. C.
name: Stenkin, Yu. V.
name: Stepanov, V.
name: Su, Y.
name: Sun, D. X.
name: Sun, Q. N.
name: Sun, X. N. Sun Z. B.
name: Takata, J.
name: Tan, P. H. T. Tam H. B.
name: Tang, Q. W.
name: Tang, R.
name: Tang, Z. B.
name: Tian, W. W.
name: Tong, C. N.
name: Wang, L. H. Wan C.
name: Wang, G. W.
name: Wang, H. G.
name: Wang, H. H. Wang J. C.
name: Wang, K.
name: Wang, Kai
name: Wang, Kai
name: Wang, L. P.
name: Wang, L. Y.
name: Wang, L. Y.
name: Wang, R.
name: Wang, W. Wang X. G. Wang X. J.
name: Wang, X. Y.
name: Wang, Y.
name: Wang, Y. D.
name: Wang, Z. H.
name: Wang, Z. X.
name: Wang, Zheng
name: Wei, D. M.
name: Wei, J. J.
name: Wei, Y. J.
name: Wen, T.
name: Weng, S. S.
name: Wu, C. Y.
name: Wu, H. R.
name: Wu, Q. W.
name: Wu, S.
name: Wu, X. F.
name: Wu, Y. S.
name: Xi, S. Q.
name: Xia, J.
name: Xia, J. J.
name: Xiang, G. M.
name: Xiao, D. X.
name: Xiao, G.
name: Xin, Y. L.
name: Xing, Y.
name: Xiong, D. R.
name: Xiong, Z.
name: Xu, D. L.
name: Xu, R. F.
name: Xu, R. X.
name: Xu, W. L.
name: Xue, L.
name: Yan, D. H.
name: Yan, J. Z.
name: Yan, T.
name: Yang, C. W.
name: Yang, C. Y.
name: Yang, F. F.
name: Yang, L. L. Yang M. J.
name: Yang, R. Z.
name: Yang, W. X.
name: Yao, Y. H.
name: Yao, Z. G.
name: Ye, X. A.
name: Yin, L. Q.
name: Yin, N.
name: You, X. H.
name: You, Z. Y.
name: Yu, Y. H.
name: Yuan, Q.
name: Yue, H.
name: Zeng, H. D.
name: Zeng, T. X.
name: Zeng, W.
name: Zha, M.
name: Zhang, B. B.
name: Zhang, B. T.
name: Zhang, F.
name: Zhang, H.
name: Zhang, H. M. Zhang H. Y.
name: Zhang, J. L.
name: Zhang, Li
name: Zhang, P. F.
name: Zhang, P. P.
name: Zhang, R.
name: Zhang, S. R.
name: Zhang, S. S.
name: Zhang, W. Y.
name: Zhang, X.
name: Zhang, X. P.
name: Zhang, Yi
name: Zhang, Yong
name: Zhang, Z. P.
name: Zhao, J.
name: Zhao, L.
name: Zhao, L. Z.
name: Zhao, S. P.
name: Zhao, X. H.
name: Zhao, Z. H.
name: Zheng, F.
name: Zhong, W. J.
name: Zhou, B.
name: Zhou, H.
name: Zhou, J. N.
name: Zhou, M.
name: Zhou, P.
name: Zhou, R.
name: Zhou, X. X.
name: Zhou, X. X.
name: Zhu, B. Y.
name: Zhu, C. G.
name: Zhu, F. R.
name: Zhu, H.
name: Zhu, K. J.
name: Zou, Y. C.
name: Zuo, X.
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: In this study, we present a comprehensive analysis of an unidentified point-like ultra-high-energy (UHE) $γ$-ray source, designated as 1LHAASO J1740+0948u, situated in the vicinity of the middle-aged pulsar PSR J1740+1000. The detection significance reached 17.1$σ$ (9.4$σ$) above 25$\,$TeV (100$\,$TeV). The source energy spectrum extended up to 300$\,$TeV, which was well fitted by a log-parabola function with $N0 = (1.93\pm0.23) \times 10^{-16} \rm{TeV^{-1}\,cm^{-2}\,s^{-2}}$, $α= 2.14\pm0.27$, and $β= 1.20\pm0.41$ at E0 = 30$\,$TeV. The associated pulsar, PSR J1740+1000, resides at a high galactic latitude and powers a bow-shock pulsar wind nebula (BSPWN) with an extended X-ray tail. The best-fit position of the gamma-ray source appeared to be shifted by $0.2^{\circ}$ with respect to the pulsar position. As the (i) currently identified pulsar halos do not demonstrate such offsets, and (ii) centroid of the gamma-ray emission is approximately located at the extension of the X-ray tail, we speculate that the UHE $γ$-ray emission may originate from re-accelerated electron/positron pairs that are advected away in the bow-shock tail.
description: Corrected spelling errors in several author names