Measurement of very-high-energy diffuse gamma-ray emission from |b| < 5◦ of the Galactic plane with LHAASO-WCDA

LHAASO Collaboration

Measurement of very-high-energy diffuse gamma-ray emission from |b| < 5^◦ of the Galactic plane with LHAASO-WCDA

LHAASO Collaboration

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

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

1 Scopus citations

Abstract

Galactic diffuse gamma ray emission (GDE) is introduced by the galactic cosmic rays (CR) interacting with the interstellar medium (ISM) and radiation fields (ISRF). The GDE is a very important probe of CR propagation and interaction. Different from the measurements of CR particles in the local vicinity, the GDE enables a direct measurement of CR distribution in the Milky Way, and can thus provide much more important information of the production and propagation of CRs. LHAASO-WCDA, with an large area of 78000 m², has an excellent ability to study VHE gamma-ray astronomy and GDE. In this proceeding, method of background estimation and some techniques to reduce the contaminant of resolved gamma-ray sources are briefly introduced. At last, diffuse emissions from the inner (15^◦ < l < 125^◦, |b| < 5^◦) and outer (125^◦ < l < 235^◦, |b| < 5^◦) Galactic plane are detected with 27.9σ and 11.9σ significance, respectively.

Original language	English
Article number	672
Journal	Proceedings of Science
Volume	444
State	Published - 27 Sep 2024
Externally published	Yes
Event	38th International Cosmic Ray Conference, ICRC 2023 - Nagoya, Japan Duration: 26 Jul 2023 → 3 Aug 2023

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@article{033216cc1bf94fbd9d1a65db8e4b75b2,

title = "Measurement of very-high-energy diffuse gamma-ray emission from |b| < 5◦ of the Galactic plane with LHAASO-WCDA",

abstract = "Galactic diffuse gamma ray emission (GDE) is introduced by the galactic cosmic rays (CR) interacting with the interstellar medium (ISM) and radiation fields (ISRF). The GDE is a very important probe of CR propagation and interaction. Different from the measurements of CR particles in the local vicinity, the GDE enables a direct measurement of CR distribution in the Milky Way, and can thus provide much more important information of the production and propagation of CRs. LHAASO-WCDA, with an large area of 78000 m2, has an excellent ability to study VHE gamma-ray astronomy and GDE. In this proceeding, method of background estimation and some techniques to reduce the contaminant of resolved gamma-ray sources are briefly introduced. At last, diffuse emissions from the inner (15◦ < l < 125◦, |b| < 5◦) and outer (125◦ < l < 235◦, |b| < 5◦) Galactic plane are detected with 27.9σ and 11.9σ significance, respectively.",

author = "\{LHAASO Collaboration\} and Huicai Li and Peipei Zhang and Shicong Hu and Min Zha and Yiqing Guo and Qiang Yuan and Zhiguo Yao and Zhen Cao and F. Aharonian and Q. An and Axikegu and Bai, \{Y. X.\} and Bao, \{Y. W.\} and D. Bastieri and Bi, \{X. J.\} and Bi, \{Y. J.\} and Cai, \{J. T.\} and Q. Cao and Cao, \{W. Y.\} and Zhe Cao and J. Chang and Chang, \{J. F.\} and Chen, \{A. M.\} and Chen, \{E. S.\} and Liang Chen and Lin Chen and Long Chen and Chen, \{M. J.\} and Chen, \{M. L.\} and Chen, \{Q. H.\} and Chen, \{S. H.\} and Chen, \{S. Z.\} and Chen, \{T. L.\} and Y. Chen and N. Cheng and Cheng, \{Y. D.\} 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 \{della Volpe\}, D. and Dong, \{X. Q.\} and Duan, \{K. K.\} and Fan, \{J. H.\} and Fan, \{Y. Z.\} and Geng, \{L. S.\}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons.; 38th International Cosmic Ray Conference, ICRC 2023 ; Conference date: 26-07-2023 Through 03-08-2023",

year = "2024",

month = sep,

day = "27",

language = "英语",

volume = "444",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

}

TY - JOUR

T1 - Measurement of very-high-energy diffuse gamma-ray emission from |b| < 5◦ of the Galactic plane with LHAASO-WCDA

AU - LHAASO Collaboration

AU - Li, Huicai

AU - Zhang, Peipei

AU - Hu, Shicong

AU - Zha, Min

AU - Guo, Yiqing

AU - Yuan, Qiang

AU - Yao, Zhiguo

AU - Cao, Zhen

AU - Aharonian, F.

AU - An, Q.

AU - Axikegu,

AU - Bai, Y. X.

AU - Bao, Y. W.

AU - Bastieri, D.

AU - Bi, X. J.

AU - Bi, Y. J.

AU - Cai, J. T.

AU - Cao, Q.

AU - Cao, W. Y.

AU - Cao, Zhe

AU - Chang, J.

AU - Chang, J. F.

AU - Chen, A. M.

AU - Chen, E. S.

AU - Chen, Liang

AU - Chen, Lin

AU - Chen, Long

AU - Chen, M. J.

AU - Chen, M. L.

AU - Chen, Q. H.

AU - Chen, S. H.

AU - Chen, S. Z.

AU - Chen, T. L.

AU - Chen, Y.

AU - Cheng, N.

AU - Cheng, Y. D.

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 - della Volpe, D.

AU - Dong, X. Q.

AU - Duan, K. K.

AU - Fan, J. H.

AU - Fan, Y. Z.

AU - Geng, L. S.

PY - 2024/9/27

Y1 - 2024/9/27

N2 - Galactic diffuse gamma ray emission (GDE) is introduced by the galactic cosmic rays (CR) interacting with the interstellar medium (ISM) and radiation fields (ISRF). The GDE is a very important probe of CR propagation and interaction. Different from the measurements of CR particles in the local vicinity, the GDE enables a direct measurement of CR distribution in the Milky Way, and can thus provide much more important information of the production and propagation of CRs. LHAASO-WCDA, with an large area of 78000 m2, has an excellent ability to study VHE gamma-ray astronomy and GDE. In this proceeding, method of background estimation and some techniques to reduce the contaminant of resolved gamma-ray sources are briefly introduced. At last, diffuse emissions from the inner (15◦ < l < 125◦, |b| < 5◦) and outer (125◦ < l < 235◦, |b| < 5◦) Galactic plane are detected with 27.9σ and 11.9σ significance, respectively.

AB - Galactic diffuse gamma ray emission (GDE) is introduced by the galactic cosmic rays (CR) interacting with the interstellar medium (ISM) and radiation fields (ISRF). The GDE is a very important probe of CR propagation and interaction. Different from the measurements of CR particles in the local vicinity, the GDE enables a direct measurement of CR distribution in the Milky Way, and can thus provide much more important information of the production and propagation of CRs. LHAASO-WCDA, with an large area of 78000 m2, has an excellent ability to study VHE gamma-ray astronomy and GDE. In this proceeding, method of background estimation and some techniques to reduce the contaminant of resolved gamma-ray sources are briefly introduced. At last, diffuse emissions from the inner (15◦ < l < 125◦, |b| < 5◦) and outer (125◦ < l < 235◦, |b| < 5◦) Galactic plane are detected with 27.9σ and 11.9σ significance, respectively.

UR - https://www.scopus.com/pages/publications/85212291608

M3 - 会议文章

AN - SCOPUS:85212291608

SN - 1824-8039

VL - 444

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 672

T2 - 38th International Cosmic Ray Conference, ICRC 2023

Y2 - 26 July 2023 through 3 August 2023

ER -

Measurement of very-high-energy diffuse gamma-ray emission from |b| < 5^◦ of the Galactic plane with LHAASO-WCDA

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