利用西藏大气簇射阵列观测费米亮银河源的 TeV 伽马射线
高能天体物理现象
2015-05-14 v1
摘要
利用西藏-III大气簇射阵列，我们在费米大面积望远镜在 100 MeV 以上能量获得的早期亮源列表中，搜寻了 27 个潜在银道面源的 TeV 伽马射线。其中，我们观测到 7 个源，而非在 2 sigma 或更高显著性超出下的预期 0.61 个源。根据泊松统计，偶然概率估计为 3.8 x 10^-6。如果西藏-III阵列观测到的超出分布具有朝向银道面的密度梯度，则偶然关联的预期源数可能会增加。随后，基于简单的蒙特卡洛模拟，偶然概率略微上升至 1.2 x 10^-5。这些极低的偶然概率清楚地表明，费米亮银道面源与 TeV 伽马射线超出具有统计上显著的相关性。我们还发现所有 7 个源均与脉冲星相关，其中 6 个与 Milagro 实验在 35 TeV 代表能量下以 3 sigma 或更高显著性探测到的源相符合。西藏-III大气簇射阵列在费米源（与 Milagro >=3sigma 源相符）周围观测到的显著性图与 Milagro 的观测结果一致。这是费米亮银道面源在 TeV 能区北天巡天的首个结果。
引用
@article{arxiv.0912.0386,
title = {Observation of TeV Gamma Rays from the Fermi Bright Galactic Sources with the Tibet Air Shower Array},
author = {M. Amenomori and X. J. Bi and D. Chen and S. W. Cui and Danzengluobu and L. K. Ding and X. H. Ding and C. Fan and C. F. Feng and Zhaoyang Feng and Z. Y. Feng and X. Y. Gao and Q. X. Geng and Q. B. Gou and H. W. Guo and H. H. He and M. He and K. Hibino and N. Hotta and Haibing Hu and H. B. Hu and J. Huang and Q. Huang and H. Y. Jia and L. Jiang and F. Kajino and K. Kasahara and Y. Katayose and C. Kato and K. Kawata and Labaciren and G. M. Le and A. F. Li and H. C. Li and J. Y. Li and C. Liu and Y. -Q. Lou and H. Lu and X. R. Meng and K. Mizutani and J. Mu and K. Munakata and H. Nanjo and M. Nishizawa and M. Ohnishi and I. Ohta and S. Ozawa and T. Saito and T. Y. Saito and M. Sakata and T. K. Sako and M. Shibata and A. Shiomi and T. Shirai and H. Sugimoto and M. Takita and Y. H. Tan and N. Tateyama and S. Torii and H. Tsuchiya and S. Udo and B. Wang and H. Wang and Y. Wang and Y. G. Wang and H. R. Wu and L. Xue and Y. Yamamoto and C. T. Yan and X. C. Yang and S. Yasue and Z. H. Ye and G. C. Yu and A. F. Yuan and T. Yuda and H. M. Zhang and J. L. Zhang and N. J. Zhang and X. Y. Zhang and Y. Zhang and Yi Zhang and Ying Zhang and Zhaxisangzhu and X. X. Zhou},
journal= {arXiv preprint arXiv:0912.0386},
year = {2015}
}
备注
17 pages, 2 figures, 1 table, Accepted for publication in ApJ Letters