Observations of SNR CTB 109 with LHAASO

LHAASO Collaboration

doi:10.22323/1.501.0732

Observations of SNR CTB 109 with LHAASO

LHAASO Collaboration

CAS - Institute of High Energy Physics
University of Chinese Academy of Sciences
TIANFU Cosmic Ray Research Center
University of Science and Technology of China
Yerevan State University
Max Planck Institute for Nuclear Physics
Shanghai Jiao Tong University
Guangzhou University
Institute for Nuclear Research of the Russian Academy of Sciences
Southwest Jiaotong University
University of Science and Technology of China
CAS - Purple Mountain Observatory
Zhejiang Lab
CAS - Shanghai Astronomical Observatory
Yunnan University
Tibet University
Nanjing University
Chinese University of Hong Kong
Hebei Normal University
CAS - National Astronomical Observatories
Sun Yat-Sen University
School of Physics
Shandong University
Observatoire de Paris
Tsinghua University
Zhengzhou University
China Center of Advanced Science and Technology World Laboratory
Sichuan University
Nanchang University
Peking University
Guangxi University
Mahidol University
Nanjing Normal University
Moscow Institute of Physics and Technology
CAS - National Space Science Center
Huazhong University of Science and Technology

Research output: Contribution to journal › Conference article › peer-review

Abstract

CTB 109 is a middle-aged shell-type supernova remnant (SNR) with bright thermal X-ray emission. The gamma-ray emission of CTB 109 exhibits a center-bright morphology, which is very consistent with its thermal X-ray emission rather than the shell-type structure in the radio band. The GeV gamma-ray spectrum shows a significant spectral curvature at a few GeV, which can well explain the lack of TeV gamma-ray emission from CTB 109. In this work, we describe the observations of CTB 109 by LHAASO, together with the updated observations by Fermi-LAT. Based on the LHAASO measurements, we will set stringent upper limits on the distribution of particles accelerated by CTB 109. We perform extensive modelling using multi-wavelength data available for CTB 109, and discuss the different emission models for leptonic and hadronic scenarios.

Original language	English
Article number	732
Journal	Proceedings of Science
Volume	501
DOIs	https://doi.org/10.22323/1.501.0732
State	Published - 30 Dec 2025
Externally published	Yes
Event	39th International Cosmic Ray Conference, ICRC 2025 - Geneva, Switzerland Duration: 15 Jul 2025 → 24 Jul 2025

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10.22323/1.501.0732

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@article{d1f27f0dba39427d85ebebe73224ce61,

title = "Observations of SNR CTB 109 with LHAASO",

abstract = "CTB 109 is a middle-aged shell-type supernova remnant (SNR) with bright thermal X-ray emission. The gamma-ray emission of CTB 109 exhibits a center-bright morphology, which is very consistent with its thermal X-ray emission rather than the shell-type structure in the radio band. The GeV gamma-ray spectrum shows a significant spectral curvature at a few GeV, which can well explain the lack of TeV gamma-ray emission from CTB 109. In this work, we describe the observations of CTB 109 by LHAASO, together with the updated observations by Fermi-LAT. Based on the LHAASO measurements, we will set stringent upper limits on the distribution of particles accelerated by CTB 109. We perform extensive modelling using multi-wavelength data available for CTB 109, and discuss the different emission models for leptonic and hadronic scenarios.",

author = "\{LHAASO Collaboration\} and Zhen Cao and F. Aharonian and Bai, \{Y. X.\} and Bao, \{Y. W.\} and D. Bastieri and Bi, \{X. J.\} and Bi, \{Y. J.\} and W. Bian and Bukevich, \{A. V.\} and Cai, \{C. M.\} and Cao, \{W. Y.\} and Zhe Cao and J. Chang and Chang, \{J. F.\} and Chen, \{A. M.\} and Chen, \{E. S.\} and Chen, \{G. H.\} and Chen, \{H. X.\} and Liang Chen and Long Chen and Chen, \{M. J.\} and Chen, \{M. L.\} and Chen, \{Q. H.\} and S. Chen and Chen, \{S. H.\} and Chen, \{S. Z.\} and Chen, \{T. L.\} and Chen, \{X. B.\} and Chen, \{X. J.\} and Y. Chen and N. Cheng and Cheng, \{Y. D.\} and Chu, \{M. C.\} and Cui, \{M. Y.\} and Cui, \{S. W.\} and Cui, \{X. H.\} and Cui, \{Y. D.\} and Dai, \{B. Z.\} and Dai, \{H. L.\} and Dai, \{Z. G.\} and Danzengluobu and Diao, \{Y. X.\} and Dong, \{X. Q.\} and Duan, \{K. K.\} and Fan, \{J. H.\} and Fan, \{Y. Z.\} and J. Fang and Fang, \{J. H.\} and K. Fang and Geng, \{L. S.\}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s); 39th International Cosmic Ray Conference, ICRC 2025 ; Conference date: 15-07-2025 Through 24-07-2025",

year = "2025",

month = dec,

day = "30",

doi = "10.22323/1.501.0732",

language = "英语",

volume = "501",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

}

TY - JOUR

T1 - Observations of SNR CTB 109 with LHAASO

AU - LHAASO Collaboration

AU - Cao, Zhen

AU - Aharonian, F.

AU - Bai, Y. X.

AU - Bao, Y. W.

AU - Bastieri, D.

AU - Bi, X. J.

AU - Bi, Y. J.

AU - Bian, W.

AU - Bukevich, A. V.

AU - Cai, C. M.

AU - Cao, W. Y.

AU - Cao, Zhe

AU - Chang, J.

AU - Chang, J. F.

AU - Chen, A. M.

AU - Chen, E. S.

AU - Chen, G. H.

AU - Chen, H. X.

AU - Chen, Liang

AU - Chen, Long

AU - Chen, M. J.

AU - Chen, M. L.

AU - Chen, Q. H.

AU - Chen, S.

AU - Chen, S. H.

AU - Chen, S. Z.

AU - Chen, T. L.

AU - Chen, X. B.

AU - Chen, X. J.

AU - Chen, Y.

AU - Cheng, N.

AU - Cheng, Y. D.

AU - Chu, M. C.

AU - Cui, M. Y.

AU - Cui, S. W.

AU - Cui, X. H.

AU - Cui, Y. D.

AU - Dai, B. Z.

AU - Dai, H. L.

AU - Dai, Z. G.

AU - Danzengluobu,

AU - Diao, Y. X.

AU - Dong, X. Q.

AU - Duan, K. K.

AU - Fan, J. H.

AU - Fan, Y. Z.

AU - Fang, J.

AU - Fang, J. H.

AU - Fang, K.

AU - Geng, L. S.

PY - 2025/12/30

Y1 - 2025/12/30

N2 - CTB 109 is a middle-aged shell-type supernova remnant (SNR) with bright thermal X-ray emission. The gamma-ray emission of CTB 109 exhibits a center-bright morphology, which is very consistent with its thermal X-ray emission rather than the shell-type structure in the radio band. The GeV gamma-ray spectrum shows a significant spectral curvature at a few GeV, which can well explain the lack of TeV gamma-ray emission from CTB 109. In this work, we describe the observations of CTB 109 by LHAASO, together with the updated observations by Fermi-LAT. Based on the LHAASO measurements, we will set stringent upper limits on the distribution of particles accelerated by CTB 109. We perform extensive modelling using multi-wavelength data available for CTB 109, and discuss the different emission models for leptonic and hadronic scenarios.

AB - CTB 109 is a middle-aged shell-type supernova remnant (SNR) with bright thermal X-ray emission. The gamma-ray emission of CTB 109 exhibits a center-bright morphology, which is very consistent with its thermal X-ray emission rather than the shell-type structure in the radio band. The GeV gamma-ray spectrum shows a significant spectral curvature at a few GeV, which can well explain the lack of TeV gamma-ray emission from CTB 109. In this work, we describe the observations of CTB 109 by LHAASO, together with the updated observations by Fermi-LAT. Based on the LHAASO measurements, we will set stringent upper limits on the distribution of particles accelerated by CTB 109. We perform extensive modelling using multi-wavelength data available for CTB 109, and discuss the different emission models for leptonic and hadronic scenarios.

UR - https://www.scopus.com/pages/publications/105029049691

U2 - 10.22323/1.501.0732

DO - 10.22323/1.501.0732

M3 - 会议文章

AN - SCOPUS:105029049691

SN - 1824-8039

VL - 501

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 732

T2 - 39th International Cosmic Ray Conference, ICRC 2025

Y2 - 15 July 2025 through 24 July 2025

ER -

Observations of SNR CTB 109 with LHAASO

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