Deep view of composite SNR CTA1 with LHAASO in γ-rays up to 300 TeV

LHASSO Collaboration; Cao, Zhen; Aharonian, F.; Axikegu ,; Y. X., Bai; Bao, Y. W.; Bastieri, D.; Bi, X. J.; Bi, Y. J.; Bian, W.; Bukevich, A. V.; Cao, Q.; Cao, W. Y.; Cao, Zhe; Chang, J.; Chang, J. F.; Chen, A. M.; Chen, E. S.; Chen, H. X.; Chen, Liang; Chen, Lin; Chen, Long; Chen, M. J.; Chen, M. L.; Chen, Q. H.; Chen, S.; Chen, S. H.; Chen, S. Z.; Chen, T. L.; Chen, Y.; Cheng, N.; Cheng, Y. D.; Cui, M. Y.; Cui, S. W.; Cui, X. H.; Cui, Y. D.; Dai, B. Z.; Dai, H. L.; Dai, Z. G.; Danzengluobu ,; X. Q., Dong; Duan, K. K.; Fan, J. H.; Fan, Y. Z.; Fang, J.; Fang, J. H.; Fang, K.; Feng, C. F.; Feng, H.; Feng, L.; Feng, S. H.; Feng, X. T.; Feng, Y.; Feng, Y. L.; Gabici, S.; Gao, B.; Gao, C. D.; Gao, Q.; Gao, W.; Gao, W. K.; Ge, M. M.; Geng, L. S.; Giacinti, G.; Gong, G. H.; Gou, Q. B.; Gu, M. H.; Guo, F. L.; Guo, X. L.; Guo, Y. Q.; Guo, Y. Y.; Han, Y. A.; Hasan, M.; He, H. H.; He, H. N.; He, J. Y.; He, Y.; Hor, Y. K.; Hou, B. W.; Hou, C.; Hou, X.; Hu, H. B.; Hu, Q.; Hu, S. C.; Huang, D. H.; Huang, T. Q.; Huang, W. J.; Huang, X. T.; Huang, X. Y.; Huang, Y.; Ji, X. L.; Jia, H. Y.; Jia, K.; Jiang, K.; Jiang, X. W.; Jiang, Z. J.; Jin, M.; Kang, M. M.; Karpikov, I.; Kuleshov, D.; Kurinov, K.; Li, B. B.; Li, C. M.; Li, Cheng; Li, Cong; Li, D.; Li, F.; Li, H. B.; Li, H. C.; Li, Jian; Li, Jie; Li, K.; Li, S. D.; Li, W. L.; Li, W. L.; Li, X. R.; Li, Xin; Li, Y. Z.; Li, Zhe; Li, Zhuo; Liang, E. W.; Liang, Y. F.; Lin, S. J.; Liu, B.; Liu, C.; Liu, D.; Liu, D. B.; Liu, H.; Liu, H. D.; Liu, J.; Liu, J. L.; Liu, M. Y.; Liu, R. Y.; Liu, S. M.; Liu, W.; Liu, Y.; Liu, Y. N.; Luo, Q.; Luo, Y.; Lv, H. K.; Ma, B. Q.; Ma, L. L.; Ma, X. H.; Mao, J. R.; Min, Z.; Mitthumsiri, W.; Mu, H. J.; Nan, Y. C.; Neronov, A.; Ou, L. J.; Pattarakijwanich, P.; Pei, Z. Y.; Qi, J. C.; Qi, M. Y.; Qiao, B. Q.; Qin, J. J.; Raza, A.; Ruffolo, D.; Sáiz, A.; Saeed, M.; Semikoz, D.; Shao, L.; Shchegolev, O.; Sheng, X. D.; Shu, F. W.; Song, H. C.; Stenkin, Yu. V.; Stepanov, V.; Su, Y.; Sun, D. X.; Sun, Q. N.; Sun, X. N.; Sun, Z. B.; Takata, J.; Tam, P. H. T.; Tang, Q. W.; Tang, R.; Tang, Z. B.; Tian, W. W.; Wang, C.; Wang, C. B.; Wang, G. W.; Wang, H. G.; Wang, H. H.; Wang, J. C.; Wang, Kai; Wang, Kai; Wang, L. P.; Wang, L. Y.; Wang, P. H.; Wang, R.; Wang, W.; Wang, X. G.; Wang, X. Y.; Wang, Y.; Wang, Y. D.; Wang, Y. J.; Wang, Z. H.; Wang, Z. X.; Wang, Zhen; Wang, Zheng; Wei, D. M.; Wei, J. J.; Wei, Y. J.; Wen, T.; Wu, C. Y.; Wu, H. R.; Wu, Q. W.; Wu, S.; Wu, X. F.; Wu, Y. S.; Xi, S. Q.; Xia, J.; Xiang, G. M.; Xiao, D. X.; Xiao, G.; Xin, Y. L.; Xing, Y.; Xiong, D. R.; Xiong, Z.; Xu, D. L.; Xu, R. F.; Xu, R. X.; Xu, W. L.; Xue, L.; Yan, D. H.; Yan, J. Z.; Yan, T.; Yang, C. W.; Yang, C. Y.; Yang, F.; Yang, F. F.; Yang, L. L.; Yang, M. J.; Yang, R. Z.; Yang, W. X.; Yao, Y. H.; Yao, Z. G.; Yin, L. Q.; Yin, N.; You, X. H.; You, Z. Y.; Yu, Y. H.; Yuan, Q.; Yue, H.; Zeng, H. D.; Zeng, T. X.; Zeng, W.; Zha, M.; Zhang, B. B.; Zhang, F.; Zhang, H.; Zhang, H. M.; Zhang, H. Y.; Zhang, J. L.; Zhang, Li; Zhang, P. F.; Zhang, P. P.; Zhang, R.; Zhang, S. B.; Zhang, S. R.; Zhang, S. S.; Zhang, X.; Zhang, X. P.; Zhang, Y. F.; Zhang, Yi; Zhang, Yong; Zhao, B.; Zhao, J.; Zhao, L.; Zhao, L. Z.; Zhao, S. P.; Zhao, X. H.; Zheng, F.; Zhong, W. J.; Zhou, B.; Zhou, H.; Zhou, J. N.; Zhou, M.; Zhou, P.; Zhou, R.; Zhou, X. X.; Zhou, X. X.; Zhu, B. Y.; Zhu, C. G.; Zhu, F. R.; Zhu, H.; Zhu, K. J.; Zou, Y. C.; Zuo, X.

doi:10.1007/s11433-024-2479-4

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Deep view of composite SNR CTA1 with LHAASO in γ-rays up to 300 TeV

LHASSO Collaboration, Cao, Z., Aharonian, F., Axikegu, Y. X., B., Bao, Y., et al. (2025). Deep view of composite SNR CTA1 with LHAASO in γ-rays up to 300 TeV. Science China - Physics, Mechanics & Astronomy, 68(7): 279503. doi:10.1007/s11433-024-2479-4.

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LHASSO Collaboration, Author
Cao, Zhen, Author
Aharonian, F.¹, Author
Axikegu , Author
Y. X., Bai, Author
Bao, Y. W., Author
Bastieri, D., Author
Bi, X. J., Author
Bi, Y. J., Author
Bian, W., Author
Bukevich, A. V., Author
Cao, Q., Author
Cao, W. Y., Author
Cao, Zhe, Author
Chang, J., Author
Chang, J. F., Author
Chen, A. M., Author
Chen, E. S., Author
Chen, H. X., Author
Chen, Liang, Author
Chen, Lin, AuthorChen, Long, AuthorChen, M. J., AuthorChen, M. L., AuthorChen, Q. H., AuthorChen, S., AuthorChen, S. H., AuthorChen, S. Z., AuthorChen, T. L., AuthorChen, Y., AuthorCheng, N., AuthorCheng, Y. D., AuthorCui, M. Y., AuthorCui, S. W., AuthorCui, X. H., AuthorCui, Y. D., AuthorDai, B. Z., AuthorDai, H. L., AuthorDai, Z. G., AuthorDanzengluobu , AuthorX. Q., Dong, AuthorDuan, K. K., AuthorFan, J. H., AuthorFan, Y. Z., AuthorFang, J., AuthorFang, J. H., AuthorFang, K., AuthorFeng, C. F., AuthorFeng, H., AuthorFeng, L., AuthorFeng, S. H., AuthorFeng, X. T., AuthorFeng, Y., AuthorFeng, Y. L., AuthorGabici, S., AuthorGao, B., AuthorGao, C. D., AuthorGao, Q., AuthorGao, W., AuthorGao, W. K., AuthorGe, M. M., AuthorGeng, L. S., AuthorGiacinti, G., AuthorGong, G. H., AuthorGou, Q. B., AuthorGu, M. H., AuthorGuo, F. L., AuthorGuo, X. L., AuthorGuo, Y. Q., AuthorGuo, Y. Y., AuthorHan, Y. A., AuthorHasan, M., AuthorHe, H. H., AuthorHe, H. N., AuthorHe, J. Y., AuthorHe, Y., AuthorHor, Y. K., AuthorHou, B. W., AuthorHou, C., AuthorHou, X., AuthorHu, H. B., AuthorHu, Q., AuthorHu, S. C., AuthorHuang, D. H., AuthorHuang, T. Q., AuthorHuang, W. J., AuthorHuang, X. T., AuthorHuang, X. Y., AuthorHuang, Y., AuthorJi, X. L., AuthorJia, H. Y., AuthorJia, K., AuthorJiang, K., AuthorJiang, X. W., AuthorJiang, Z. J., AuthorJin, M., AuthorKang, M. M., AuthorKarpikov, I., AuthorKuleshov, D., AuthorKurinov, K., AuthorLi, B. B., AuthorLi, C. M., AuthorLi, Cheng, AuthorLi, Cong, AuthorLi, D., AuthorLi, F., AuthorLi, H. B., AuthorLi, H. C., AuthorLi, Jian, AuthorLi, Jie, AuthorLi, K., AuthorLi, S. D., AuthorLi, W. L., AuthorLi, W. L., AuthorLi, X. R., AuthorLi, Xin, AuthorLi, Y. Z., AuthorLi, Zhe, AuthorLi, Zhuo, AuthorLiang, E. W., AuthorLiang, Y. F., AuthorLin, S. J., AuthorLiu, B., AuthorLiu, C., AuthorLiu, D., AuthorLiu, D. B., AuthorLiu, H., AuthorLiu, H. D., AuthorLiu, J., AuthorLiu, J. L., AuthorLiu, M. Y., AuthorLiu, R. Y., AuthorLiu, S. M., AuthorLiu, W., AuthorLiu, Y., AuthorLiu, Y. N., AuthorLuo, Q., AuthorLuo, Y., AuthorLv, H. K., AuthorMa, B. Q., AuthorMa, L. L., AuthorMa, X. H., AuthorMao, J. R., AuthorMin, Z., AuthorMitthumsiri, W., AuthorMu, H. J., AuthorNan, Y. C., AuthorNeronov, A., AuthorOu, L. J., AuthorPattarakijwanich, P., AuthorPei, Z. Y., AuthorQi, J. C., AuthorQi, M. Y., AuthorQiao, B. Q., AuthorQin, J. J., AuthorRaza, A., AuthorRuffolo, D., AuthorSáiz, A., AuthorSaeed, M., AuthorSemikoz, D., AuthorShao, L., AuthorShchegolev, O., AuthorSheng, X. D., AuthorShu, F. W., AuthorSong, H. C., AuthorStenkin, Yu. V., AuthorStepanov, V., AuthorSu, Y., AuthorSun, D. X., AuthorSun, Q. N., AuthorSun, X. N., AuthorSun, Z. B., AuthorTakata, J., AuthorTam, P. H. T., AuthorTang, Q. W., AuthorTang, R., AuthorTang, Z. B., AuthorTian, W. W., AuthorWang, C., AuthorWang, C. B., AuthorWang, G. W., AuthorWang, H. G., AuthorWang, H. H., AuthorWang, J. C., AuthorWang, Kai, AuthorWang, Kai, AuthorWang, L. P., AuthorWang, L. Y., AuthorWang, P. H., AuthorWang, R., AuthorWang, W., AuthorWang, X. G., AuthorWang, X. Y., AuthorWang, Y., AuthorWang, Y. D., AuthorWang, Y. J., AuthorWang, Z. H., AuthorWang, Z. X., AuthorWang, Zhen, AuthorWang, Zheng, AuthorWei, D. M., AuthorWei, J. J., AuthorWei, Y. J., AuthorWen, T., AuthorWu, C. Y., AuthorWu, H. R., AuthorWu, Q. W., AuthorWu, S., AuthorWu, X. F., AuthorWu, Y. S., AuthorXi, S. Q., AuthorXia, J., AuthorXiang, G. M., AuthorXiao, D. X., AuthorXiao, G., AuthorXin, Y. L., AuthorXing, Y., AuthorXiong, D. R., AuthorXiong, Z., AuthorXu, D. L., AuthorXu, R. F., AuthorXu, R. X., AuthorXu, W. L., AuthorXue, L., AuthorYan, D. H., AuthorYan, J. Z., AuthorYan, T., AuthorYang, C. W., AuthorYang, C. Y., AuthorYang, F., AuthorYang, F. F., AuthorYang, L. L., AuthorYang, M. J., AuthorYang, R. Z., AuthorYang, W. X., AuthorYao, Y. H., AuthorYao, Z. G., AuthorYin, L. Q., AuthorYin, N., AuthorYou, X. H., AuthorYou, Z. Y., AuthorYu, Y. H., AuthorYuan, Q., AuthorYue, H., AuthorZeng, H. D., AuthorZeng, T. X., AuthorZeng, W., AuthorZha, M., AuthorZhang, B. B., AuthorZhang, F., AuthorZhang, H., AuthorZhang, H. M., AuthorZhang, H. Y., AuthorZhang, J. L., AuthorZhang, Li, AuthorZhang, P. F., AuthorZhang, P. P., AuthorZhang, R., AuthorZhang, S. B., AuthorZhang, S. R., AuthorZhang, S. S., AuthorZhang, X., AuthorZhang, X. P., AuthorZhang, Y. F., AuthorZhang, Yi, AuthorZhang, Yong, AuthorZhao, B., AuthorZhao, J., AuthorZhao, L., AuthorZhao, L. Z., AuthorZhao, S. P., AuthorZhao, X. H., AuthorZheng, F., AuthorZhong, W. J., AuthorZhou, B., AuthorZhou, H., AuthorZhou, J. N., AuthorZhou, M., AuthorZhou, P., AuthorZhou, R., AuthorZhou, X. X., AuthorZhou, X. X., AuthorZhu, B. Y., AuthorZhu, C. G., AuthorZhu, F. R., AuthorZhu, H., AuthorZhu, K. J., AuthorZou, Y. C., AuthorZuo, X., Author more..

Affiliations:
1Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society, ou_2074298

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Abstract: The ultra-high-energy (UHE) gamma-ray source 1LHAASO J0007+7303u is positionally associated with the composite SNR CTA1 that is located at high Galactic Latitude b ≈ 10.5^◦. This provides a rare opportunity to spatially resolve the compo- nent of the pulsar wind nebula (PWN) and supernova remnant (SNR) at UHE. This paper conducted a dedicated data anal- ysis of 1LHAASO J0007+7303u using the data collected from December 2019 to July 2023. This source is well detected with significances of 21σ and 17σ at 8-100 TeV and >100 TeV, respectively. The corresponding extensions are determined to be 0.23^◦±0.03^◦ and 0.17^◦±0.03^◦. The emission is proposed to originate from the relativistic electrons accelerated within the PWN of PSR J0007+7303. The energy spectrum is well described by a power-law with an exponential cutoff function dN/dE = (42.4 ± 4.1)( E / (20 TeV) )^{−2.31±0.11} exp(− E / (110±25 TeV) ) TeV⁻¹ cm⁻² s⁻¹ in the energy range from 8 to 300 TeV, implying a steady-state parent electron spectrum dN_e/dE_e ∝ ( E_e / (100 TeV) )^{−3.13±0.16} exp[( (−Ee) / (373±70 TeV) )²] at energies above ≈ 50 TeV. The cutoff energy of the electron spectrum is roughly equal to the expected current maximum energy of particles accelerated at the PWN terminal shock. Combining the X-ray and gamma-ray emission, the current space-averaged magnetic field can be limited to ≈ 4.5 μG. To satisfy the multi-wavelength spectrum and the γ-ray extensions, the transport of relativistic particles within the PWN is likely dominated by the advection process under the free-expansion phase assumption.

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Dates: Published Online: 2025-01-17

Publication Status: Published online

Pages: 14

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Identifiers: DOI: 10.1007/s11433-024-2479-4

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Title: Science China - Physics, Mechanics & Astronomy

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Publ. Info: China : Science China Press

Pages: - Volume / Issue: 68 (7) Sequence Number: 279503 Start / End Page: - Identifier: ISSN: 1674-7348
CoNE: https://pure.mpg.de/cone/journals/resource/1674-7348