Observation of multi-TeV diffuse gamma rays from the galactic plane with the Tibet air shower array

M. Amenomori; S. Ayabe; S. H. Cui; L. K. Ding; X. H. Ding; C. F. Feng; Z. Y. Feng; Y. Fu; X. Y. Gao; Q. X. Geng; H. W. Guo; M. He; K. Hibino; N. Hotta; J. Huang; Q. Huang; X. Huo; K. Izu; H. Y. Jia; F. Kajino; K. Kasahara; Y. Katayose; K. Kawata; Labaciren; G. M. Le; J. Y. Li; H. Lu; S. L. Lu; G. X. Luo; X. R. Meng; K. Mizutani; J. Mu; H. Nanjo; M. Nishizawa; M. Ohnishi; I. Ohta; H. Ooura; T. Ouchi; Shunsuke Ozawa; J. R. Ren; T. Saito; M. Sakata; T. Sasaki; M. Shibata; A. Shiomi; T. Shirai; H. Sugimoto; K. Taira; M. Takita; Y. H. Tan; N. Tateyama; Shoji Torii; H. Tsuchiya; S. Udo; T. Utsugi; C. R. Wang; H. Wang; X. Wang; X. W. Xu; L. Xue; X. C. Yang; Y. Yamamoto; Z. H. Ye; G. C. Yu; A. F. Yuan; T. Yuda; H. M. Zhang; J. L. Zhang; N. J. Zhang; X. Y. Zhang; Zhaxiciren; Zhaxisangzhu

doi:10.1086/343857

Observation of multi-TeV diffuse gamma rays from the galactic plane with the Tibet air shower array

M. Amenomori^*, S. Ayabe, S. H. Cui, L. K. Ding, X. H. Ding, C. F. Feng, Z. Y. Feng, Y. Fu, X. Y. Gao, Q. X. Geng, H. W. Guo, M. He, K. Hibino, N. Hotta, J. Huang, Q. Huang, X. Huo, K. Izu, H. Y. Jia, F. KajinoK. Kasahara, Y. Katayose, K. Kawata, Labaciren, G. M. Le, J. Y. Li, H. Lu, S. L. Lu, G. X. Luo, X. R. Meng, K. Mizutani, J. Mu, H. Nanjo, M. Nishizawa, M. Ohnishi, I. Ohta, H. Ooura, T. Ouchi, Shunsuke Ozawa, J. R. Ren, T. Saito, M. Sakata, T. Sasaki, M. Shibata, A. Shiomi, T. Shirai, H. Sugimoto, K. Taira, M. Takita, Y. H. Tan, N. Tateyama, Shoji Torii, H. Tsuchiya, S. Udo, T. Utsugi, C. R. Wang, H. Wang, X. Wang, X. W. Xu, L. Xue, X. C. Yang, Y. Yamamoto, Z. H. Ye, G. C. Yu, A. F. Yuan, T. Yuda, H. M. Zhang, J. L. Zhang, N. J. Zhang, X. Y. Zhang, Zhaxiciren, Zhaxisangzhu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

Abstract

Data from the Tibet III air shower array (with energies around 3 TeV) and from the Tibet II array (with energies around 10 TeV) have been searched for diffuse gamma rays from the Galactic plane. These arrays have an angular resolution of about 0°.9. The sky regions searched are the inner Galaxy, 20° ≤ l ≤ 55°, and outer Galaxy, 140° ≤ l ° 225°, and |b| ≤ 2° or ≤ 5°. No significant Galactic-plane gamma-ray excess was observed. The 99% confidence level upper limits for gamma-ray intensity obtained are (for |b| ≤ 2°) 1.1 × 10^-15cm ^-2s^-1sr^-1MeV^-1at 3 TeV and 4.1 × 10^-17 cm^-2 s^-1 sr^-1 MeV ^-1 at 10 TeV for the inner Galaxy, and 3.6 × 10^-16 cm^-2 s^-1 sr^-1 MeV^-1 at 3 TeV and 1. 3 × 10^-17 cm^-2 s^-1 sr^-1 MeV^-1 at 10 TeV for the outer Galaxy, assuming a differential spectral index of 2.4. The upper limits are significant in the multi-TeV region when compared to those from Cerenkov telescopes in the lower energy region and other air shower arrays in the higher energy region; however, the results are not sufficient to rule out the inverse Compton model with a source electron spectral index of 2.0.

Original language	English
Pages (from-to)	887-895
Number of pages	9
Journal	Astrophysical Journal
Volume	580
Issue number	2 I
DOIs	https://doi.org/10.1086/343857
Publication status	Published - 2002 Dec 1
Externally published	Yes

Keywords

Acceleration of particles
Cosmic rays
Galaxy: disk
ISM: general

ASJC Scopus subject areas

Space and Planetary Science

Access to Document

10.1086/343857

Cite this

Amenomori, M., Ayabe, S., Cui, S. H., Ding, L. K., Ding, X. H., Feng, C. F., Feng, Z. Y., Fu, Y., Gao, X. Y., Geng, Q. X., Guo, H. W., He, M., Hibino, K., Hotta, N., Huang, J., Huang, Q., Huo, X., Izu, K., Jia, H. Y., ... Zhaxisangzhu (2002). Observation of multi-TeV diffuse gamma rays from the galactic plane with the Tibet air shower array. Astrophysical Journal, 580(2 I), 887-895. https://doi.org/10.1086/343857

Amenomori, M, Ayabe, S, Cui, SH, Ding, LK, Ding, XH, Feng, CF, Feng, ZY, Fu, Y, Gao, XY, Geng, QX, Guo, HW, He, M, Hibino, K, Hotta, N, Huang, J, Huang, Q, Huo, X, Izu, K, Jia, HY, Kajino, F, Kasahara, K, Katayose, Y, Kawata, K, Labaciren, Le, GM, Li, JY, Lu, H, Lu, SL, Luo, GX, Meng, XR, Mizutani, K, Mu, J, Nanjo, H, Nishizawa, M, Ohnishi, M, Ohta, I, Ooura, H, Ouchi, T, Ozawa, S, Ren, JR, Saito, T, Sakata, M, Sasaki, T, Shibata, M, Shiomi, A, Shirai, T, Sugimoto, H, Taira, K, Takita, M, Tan, YH, Tateyama, N, Torii, S, Tsuchiya, H, Udo, S, Utsugi, T, Wang, CR, Wang, H, Wang, X, Xu, XW, Xue, L, Yang, XC, Yamamoto, Y, Ye, ZH, Yu, GC, Yuan, AF, Yuda, T, Zhang, HM, Zhang, JL, Zhang, NJ, Zhang, XY, Zhaxiciren & Zhaxisangzhu 2002, 'Observation of multi-TeV diffuse gamma rays from the galactic plane with the Tibet air shower array', Astrophysical Journal, vol. 580, no. 2 I, pp. 887-895. https://doi.org/10.1086/343857

@article{bba669c4a84e4fccae7fda7fc7585e85,

title = "Observation of multi-TeV diffuse gamma rays from the galactic plane with the Tibet air shower array",

abstract = "Data from the Tibet III air shower array (with energies around 3 TeV) and from the Tibet II array (with energies around 10 TeV) have been searched for diffuse gamma rays from the Galactic plane. These arrays have an angular resolution of about 0°.9. The sky regions searched are the inner Galaxy, 20° ≤ l ≤ 55°, and outer Galaxy, 140° ≤ l ° 225°, and |b| ≤ 2° or ≤ 5°. No significant Galactic-plane gamma-ray excess was observed. The 99% confidence level upper limits for gamma-ray intensity obtained are (for |b| ≤ 2°) 1.1 × 10-15cm -2s-1sr-1MeV-1at 3 TeV and 4.1 × 10-17 cm-2 s-1 sr-1 MeV -1 at 10 TeV for the inner Galaxy, and 3.6 × 10-16 cm-2 s-1 sr-1 MeV-1 at 3 TeV and 1. 3 × 10-17 cm-2 s-1 sr-1 MeV-1 at 10 TeV for the outer Galaxy, assuming a differential spectral index of 2.4. The upper limits are significant in the multi-TeV region when compared to those from Cerenkov telescopes in the lower energy region and other air shower arrays in the higher energy region; however, the results are not sufficient to rule out the inverse Compton model with a source electron spectral index of 2.0.",

keywords = "Acceleration of particles, Cosmic rays, Galaxy: disk, ISM: general",

author = "M. Amenomori and S. Ayabe and Cui, {S. H.} and Ding, {L. K.} and Ding, {X. H.} and Feng, {C. F.} and Feng, {Z. Y.} and Y. Fu and Gao, {X. Y.} and Geng, {Q. X.} and Guo, {H. W.} and M. He and K. Hibino and N. Hotta and J. Huang and Q. Huang and X. Huo and K. Izu and Jia, {H. Y.} and F. Kajino and K. Kasahara and Y. Katayose and K. Kawata and Labaciren and Le, {G. M.} and Li, {J. Y.} and H. Lu and Lu, {S. L.} and Luo, {G. X.} and Meng, {X. R.} and K. Mizutani and J. Mu and H. Nanjo and M. Nishizawa and M. Ohnishi and I. Ohta and H. Ooura and T. Ouchi and Shunsuke Ozawa and Ren, {J. R.} and T. Saito and M. Sakata and T. Sasaki and M. Shibata and A. Shiomi and T. Shirai and H. Sugimoto and K. Taira and M. Takita and Tan, {Y. H.} and N. Tateyama and Shoji Torii and H. Tsuchiya and S. Udo and T. Utsugi and Wang, {C. R.} and H. Wang and X. Wang and Xu, {X. W.} and L. Xue and Yang, {X. C.} and Y. Yamamoto and Ye, {Z. H.} and Yu, {G. C.} and Yuan, {A. F.} and T. Yuda and Zhang, {H. M.} and Zhang, {J. L.} and Zhang, {N. J.} and Zhang, {X. Y.} and Zhaxiciren and Zhaxisangzhu",

year = "2002",

month = dec,

day = "1",

doi = "10.1086/343857",

language = "English",

volume = "580",

pages = "887--895",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2 I",

}

TY - JOUR

T1 - Observation of multi-TeV diffuse gamma rays from the galactic plane with the Tibet air shower array

AU - Amenomori, M.

AU - Ayabe, S.

AU - Cui, S. H.

AU - Ding, L. K.

AU - Ding, X. H.

AU - Feng, C. F.

AU - Feng, Z. Y.

AU - Fu, Y.

AU - Gao, X. Y.

AU - Geng, Q. X.

AU - Guo, H. W.

AU - He, M.

AU - Hibino, K.

AU - Hotta, N.

AU - Huang, J.

AU - Huang, Q.

AU - Huo, X.

AU - Izu, K.

AU - Jia, H. Y.

AU - Kajino, F.

AU - Kasahara, K.

AU - Katayose, Y.

AU - Kawata, K.

AU - Labaciren,

AU - Le, G. M.

AU - Li, J. Y.

AU - Lu, H.

AU - Lu, S. L.

AU - Luo, G. X.

AU - Meng, X. R.

AU - Mizutani, K.

AU - Mu, J.

AU - Nanjo, H.

AU - Nishizawa, M.

AU - Ohnishi, M.

AU - Ohta, I.

AU - Ooura, H.

AU - Ouchi, T.

AU - Ozawa, Shunsuke

AU - Ren, J. R.

AU - Saito, T.

AU - Sakata, M.

AU - Sasaki, T.

AU - Shibata, M.

AU - Shiomi, A.

AU - Shirai, T.

AU - Sugimoto, H.

AU - Taira, K.

AU - Takita, M.

AU - Tan, Y. H.

AU - Tateyama, N.

AU - Torii, Shoji

AU - Tsuchiya, H.

AU - Udo, S.

AU - Utsugi, T.

AU - Wang, C. R.

AU - Wang, H.

AU - Wang, X.

AU - Xu, X. W.

AU - Xue, L.

AU - Yang, X. C.

AU - Yamamoto, Y.

AU - Ye, Z. H.

AU - Yu, G. C.

AU - Yuan, A. F.

AU - Yuda, T.

AU - Zhang, H. M.

AU - Zhang, J. L.

AU - Zhang, N. J.

AU - Zhang, X. Y.

AU - Zhaxiciren,

AU - Zhaxisangzhu,

PY - 2002/12/1

Y1 - 2002/12/1

N2 - Data from the Tibet III air shower array (with energies around 3 TeV) and from the Tibet II array (with energies around 10 TeV) have been searched for diffuse gamma rays from the Galactic plane. These arrays have an angular resolution of about 0°.9. The sky regions searched are the inner Galaxy, 20° ≤ l ≤ 55°, and outer Galaxy, 140° ≤ l ° 225°, and |b| ≤ 2° or ≤ 5°. No significant Galactic-plane gamma-ray excess was observed. The 99% confidence level upper limits for gamma-ray intensity obtained are (for |b| ≤ 2°) 1.1 × 10-15cm -2s-1sr-1MeV-1at 3 TeV and 4.1 × 10-17 cm-2 s-1 sr-1 MeV -1 at 10 TeV for the inner Galaxy, and 3.6 × 10-16 cm-2 s-1 sr-1 MeV-1 at 3 TeV and 1. 3 × 10-17 cm-2 s-1 sr-1 MeV-1 at 10 TeV for the outer Galaxy, assuming a differential spectral index of 2.4. The upper limits are significant in the multi-TeV region when compared to those from Cerenkov telescopes in the lower energy region and other air shower arrays in the higher energy region; however, the results are not sufficient to rule out the inverse Compton model with a source electron spectral index of 2.0.

AB - Data from the Tibet III air shower array (with energies around 3 TeV) and from the Tibet II array (with energies around 10 TeV) have been searched for diffuse gamma rays from the Galactic plane. These arrays have an angular resolution of about 0°.9. The sky regions searched are the inner Galaxy, 20° ≤ l ≤ 55°, and outer Galaxy, 140° ≤ l ° 225°, and |b| ≤ 2° or ≤ 5°. No significant Galactic-plane gamma-ray excess was observed. The 99% confidence level upper limits for gamma-ray intensity obtained are (for |b| ≤ 2°) 1.1 × 10-15cm -2s-1sr-1MeV-1at 3 TeV and 4.1 × 10-17 cm-2 s-1 sr-1 MeV -1 at 10 TeV for the inner Galaxy, and 3.6 × 10-16 cm-2 s-1 sr-1 MeV-1 at 3 TeV and 1. 3 × 10-17 cm-2 s-1 sr-1 MeV-1 at 10 TeV for the outer Galaxy, assuming a differential spectral index of 2.4. The upper limits are significant in the multi-TeV region when compared to those from Cerenkov telescopes in the lower energy region and other air shower arrays in the higher energy region; however, the results are not sufficient to rule out the inverse Compton model with a source electron spectral index of 2.0.

KW - Acceleration of particles

KW - Cosmic rays

KW - Galaxy: disk

KW - ISM: general

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UR - http://www.scopus.com/inward/citedby.url?scp=0041328804&partnerID=8YFLogxK

U2 - 10.1086/343857

DO - 10.1086/343857

M3 - Article

AN - SCOPUS:0041328804

SN - 0004-637X

VL - 580

SP - 887

EP - 895

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 I

ER -

Observation of multi-TeV diffuse gamma rays from the galactic plane with the Tibet air shower array

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