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

Research output: Contribution to journalArticle

42 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 languageEnglish
Pages (from-to)887-895
Number of pages9
JournalAstrophysical Journal
Volume580
Issue number2 I
DOIs
Publication statusPublished - 2002 Dec 1
Externally publishedYes

Fingerprint

Tibet
cosmic ray showers
gamma rays
galaxies
air
energy
electron sources
angular resolution
sky
confidence
telescopes
electron
index

Keywords

  • Acceleration of particles
  • Cosmic rays
  • Galaxy: disk
  • ISM: general

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Amenomori, M., Ayabe, S., Cui, S. H., Ding, L. K., Ding, X. H., Feng, C. F., ... 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

Observation of multi-TeV diffuse gamma rays from the galactic plane with the Tibet air shower array. / 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.; Kajino, F.; Kasahara, K.; Katayose, Y.; Kawata, K.; Labaciren; Le, G. M.; Li, J. Y.; Lu, H.; Lu, S. L.; Luo, G. X.; Meng, X. R.; Mizutani, K.; Mu, J.; Nanjo, H.; Nishizawa, M.; Ohnishi, M.; Ohta, I.; Ooura, H.; Ouchi, T.; Ozawa, Shunsuke; Ren, J. R.; Saito, T.; Sakata, M.; Sasaki, T.; Shibata, M.; Shiomi, A.; Shirai, T.; Sugimoto, H.; Taira, K.; Takita, M.; Tan, Y. H.; Tateyama, N.; Torii, Shoji; Tsuchiya, H.; Udo, S.; Utsugi, T.; Wang, C. R.; Wang, H.; Wang, X.; Xu, X. W.; Xue, L.; Yang, X. C.; Yamamoto, Y.; Ye, Z. H.; Yu, G. C.; Yuan, A. F.; Yuda, T.; Zhang, H. M.; Zhang, J. L.; Zhang, N. J.; Zhang, X. Y.; Zhaxiciren; Zhaxisangzhu.

In: Astrophysical Journal, Vol. 580, No. 2 I, 01.12.2002, p. 887-895.

Research output: Contribution to journalArticle

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
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. ; Kajino, F. ; Kasahara, K. ; Katayose, Y. ; Kawata, K. ; Labaciren ; Le, G. M. ; Li, J. Y. ; Lu, H. ; Lu, S. L. ; Luo, G. X. ; Meng, X. R. ; Mizutani, K. ; Mu, J. ; Nanjo, H. ; Nishizawa, M. ; Ohnishi, M. ; Ohta, I. ; Ooura, H. ; Ouchi, T. ; Ozawa, Shunsuke ; Ren, J. R. ; Saito, T. ; Sakata, M. ; Sasaki, T. ; Shibata, M. ; Shiomi, A. ; Shirai, T. ; Sugimoto, H. ; Taira, K. ; Takita, M. ; Tan, Y. H. ; Tateyama, N. ; Torii, Shoji ; Tsuchiya, H. ; Udo, S. ; Utsugi, T. ; Wang, C. R. ; Wang, H. ; Wang, X. ; Xu, X. W. ; Xue, L. ; Yang, X. C. ; Yamamoto, Y. ; Ye, Z. H. ; Yu, G. C. ; Yuan, A. F. ; Yuda, T. ; Zhang, H. M. ; Zhang, J. L. ; Zhang, N. J. ; Zhang, X. Y. ; Zhaxiciren ; Zhaxisangzhu. / Observation of multi-TeV diffuse gamma rays from the galactic plane with the Tibet air shower array. In: Astrophysical Journal. 2002 ; Vol. 580, No. 2 I. pp. 887-895.
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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.",
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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",
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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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