Towards Understanding the Origin of Cosmic-Ray Electrons

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2019-03-13

Author

Aguilar, M.
Cavasonza, L. Ali
Alpat, B.
Ambrosi, G.
Arruda, L.
Attig, N.
Azzarello, P.
Bachlechner, A.
Barao, F.
Barrau, A.
Barrin, L.
Bartoloni, A.
Basara, L.
Basegmez-du Pree, S.
Battiston, R.
Becker, U.
Behlmann, M.
Beischer, B.
Berdugo, J.
Bertucci, B.
Bindi, V
de Boer, W.
Bollweg, K.
Borgia, B.
Boschini, M. J.
Bourquin, M.
Bueno, E. F.
Burger, J.
Burger, W. J.
Cai, X. D.
Capell, M.
Caroff, S.
Casaus, J.
Castellini, G.
Cervelli, F.
Chang, Y. H.
Chen, G. M.
Chen, H. S.
Chen, Y.
Cheng, L.
Chou, H. Y.
Choutko, V
Chung, C. H.
Clark, C.
Coignet, G.
Consolandi, C.
Contin, A.
Corti, C.
Crispoltoni, M.
Cui, Z.
Dadzie, K.
Dai, Y. M.
Datta, A.
Delgado, C.
Della Torre, S.
Demirköz, Melahat Bilge
Derome, L.
Di Falco, S.
Di Felice, V
Dimiccoli, F.
Diaz, C.
von Doetinchem, P.
Dong, F.
Donnini, F.
Duranti, M.
Egorov, A.
Eline, A.
Eronen, T.
Feng, J.
Fiandrini, E.
Fisher, P.
Formato, V
Galaktionov, Y.
Garcia-Lopez, R. J.
Gargiulo, C.
Gast, H.
Gebauer, I
Gervasi, M.
Giovacchini, F.
Gomez-Coral, D. M.
Gong, J.
Goy, C.
Grabski, V
Grandi, D.
Graziani, M.
Guo, K. H.
Haino, S.
Han, K. C.
He, Z. H.
Heil, M.
Hsieh, T. H.
Huang, H.
Huang, Z. C.
Incagli, M.
Jia, Yi
Jinchi, H.
Kanishev, K.
Khiali, B.
Kirn, Th
Konak, C.
Kounin, O.
Kounine, A.
Koutsenko, V
Kulemzin, A.
La Vacca, G.
Laudi, E.
Laurenti, G.
Lazzizzera, I
Lebedev, A.
Lee, H. T.
Lee, S. C.
Leluc, C.
Li, J. Q.
Li, Q.
Li, T. X.
Li, Z. H.
Light, C.
Lin, C. H.
Lipper, T.
Liu, F. Z.
Liu, Hu
Liu, Z.
Lu, S. Q.
Lu, Y. S.
Luebelsmeyer, K.
Luo, F.
Luo, J. Z.
Luo, Xi
Lyu, S. S.
Machate, F.
Mana, C.
Marin, J.
Martin, T.
Martinez, G.
Masi, N.
Maurin, D.
Menchaca-Rocha, A.
Meng, Q.
Mo, D. C.
Molero, M.
Mott, P.
Mussolin, L.
Nelson, T.
Ni, J. Q.
Nikonov, N.
Nozzoli, F.
Oliva, A.
Orcinha, M.
Palermo, M.
Palmonari, F.
Paniccia, M.
Pashnin, A.
Pauluzzi, M.
Pensotti, S.
Perrina, C.
Phan, H. D.
Picot-Clemente, N.
Plyaskin, V
Pohl, M.
Poireau, V
Popkow, A.
Quadrani, L.
Qi, X. M.
Qin, X.
Qu, Z. Y.
Rancoita, P. G.
Rapin, D.
Reina Conde, A.
Rosier-Lee, S.
Rozhkov, A.
Rozza, D.
Sagdeev, R.
Solano, C.
Schael, S.
Schmidt, S. M.
von Dratzig, A. Schulz
Schwering, G.
Seo, E. S.
Shan, B. S.
Shi, J. Y.
Siedenburg, T.
Song, J. W.
Sun, Z. T.
Tacconi, M.
Tang, X. W.
Tang, Z. C.
Tian, J.
Ting, Samuel C. C.
Ting, S. M.
Tomassetti, N.
Torsti, J.
Urban, T.
Vagelli, V.
Valente, E.
Valtonen, E.
Vazquez Acosta, M.
Vecchi, M.
Velasco, M.
Vialle, J. P.
Vizan, J.
Wang, L. Q.
Wang, N. H.
Wang, Q. L.
Wang, X.
Wang, X. Q.
Wang, Z. X.
Wei, J.
Weng, Z. L.
Wu, H.
Xiong, R. Q.
Xu, W.
Yan, Q.
Yang, Y.
Yi, H.
Yu, Y. J.
Yu, Z. Q.
Zannoni, M.
Zeissler, S.
Zhang, C.
Zhang, F.
Zhang, J. H.
Zhang, Z.
Zhao, F.
Zheng, Z. M.
Zhuang, H. L.
Zhukov, V
Zichichi, A.
Zimmerman, N.
Zuccon, P.

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Precision results on cosmic-ray electrons are presented in the energy range from 0.5 GeV to 1.4 TeV based on 28.1 x 10(6) electrons collected by the Alpha Magnetic Spectrometer on the International Space Station. In the entire energy range the electron and positron spectra have distinctly different magnitudes and energy dependences. The electron flux exhibits a significant excess starting from 42.1(-5.2)(+5.4) GeV compared to the lower energy trends, but the nature of this excess is different from the positron flux excess above 25.2 +/- 1.8 GeV. Contrary to the positron flux, which has an exponential energy cutoff of 810(-180)(+310) GeV, at the 5 sigma level the electron flux does not have an energy cutoff below 1.9 TeV. In the entire energy range the electron flux is well described by the sum of two power law components. The different behavior of the cosmic-ray electrons and positrons measured by the Alpha Magnetic Spectrometer is clear evidence that most high energy electrons originate from different sources than high energy positrons.

Subject Keywords

General Physics and Astronomy

URI

https://hdl.handle.net/11511/52141

Journal

PHYSICAL REVIEW LETTERS

DOI

https://doi.org/10.1103/physrevlett.122.101101

Collections

Department of Physics, Article

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Citation Formats

M. Aguilar et al., “Towards Understanding the Origin of Cosmic-Ray Electrons,” PHYSICAL REVIEW LETTERS, pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/52141.