F. Alemanno, Q. An, P. Azzarello, F. C. T. Barbato, P. Bernardini, X. J. Bi, H. V. Boutin, I. Cagnoli, M. H. Cai, E. Casilli, J. F. Chang, D. Y. Chen, J. H. Chen, Z. Y. Chen, Z. Y. Chen, P. Coppin, M. Y. Cui, T. S. Cui, I. De Mitri, F. de Palma, A. Di Giovanni, T. K. Dong, Z. X. Dong, G. Donvito, J. L. Duan, K. K. Duan, R. R. Fan, Y. H. Fan, F. Fang, K. Fang, C. Q. Feng, L. Feng, S. Fogliacco, J. M. Frieden, P. Fusco, M. Gao, F. Gargano, E. Ghose, K. Gong, Y. Z. Gong, D. Y. Guo, J. N. Guo, S. X. Han, Y. X. Hu, G. S. Huang, X. T. Huang, Y. S. Huang, M. Ionica, L. Y. Jiang, W. Jiang, Y. J. Jiang, J. Kong, A. Kotenko, D. Kyratzis, S. J. Lei, B. Li, M. T. Li, W. D. Li, W. D. Li, X. Y. Li, X. Y. Li, Y. F. Liang, C. X. Liu, H. M. Liu, J. J. Liu, S. B. Liu, Y. L. Liu, F. Loparco, M. Ma, P. X. Ma, T. Ma, X. Y. Ma, G. Marsella, M. N. Mazziotta, D. Mo, Y. Nie, X. Y. Niu, A. Parenti, W. X. Peng, X. J. Peng, C. Perrina, E. Putti- Garcia, R. Qiao, J. N. Rao, Y. Rong, R. Sarkar, P. Savina, A. Serpolla, Z. Shangguan, W. H. Shen, Z. T. Shen, Z. T. Shen, L. Silveri, J. J. Song, H. Su, M. Su, H. K. Sun, Z. Q. Sun, A. Surdo, X. J. Teng
Abstract The DArk Matter Particle Explorer (DAMPE) is a spaceborne high-energy particle detector that surveys the γ -ray sky above ∼2 GeV with a peak acceptance of ∼0.2 m 2 sr. With the 102 months of data collected by DAMPE, we show that the Fermi bubbles are detected at a significance of ∼26 σ and identify a GeV excess in the direction of the Galactic center at ∼7 σ confidence. Both spectra and morphology are consistent with those observed by the Fermi Large Area Telescope (Fermi-LAT) and the GeV excess component can be interpreted by dark matter annihilation with a mass of ∼50 GeV and a velocity-averaged cross section of ∼10 −26 cm 3 s −1 for the χ χ → b b ¯ channel. Our results thus provide the first independent detection of these two intriguing diffuse γ -ray sources besides Fermi-LAT.