Towards Understanding the Origin of Cosmic-Ray Electrons

Precision results on cosmic-ray electrons are presented in the energy range from 0.5 GeV to 1.4 TeV based on 28.1×106 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 magn...

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Detalles Bibliográficos
Autores principales: Aguilar, M, Ali Cavasonza, L, Alpat, B, Ambrosi, G, Arruda, L, Attig, N, Azzarello, P, Bachlechner, A, Barao, F, Barrau, A, Barrin, L, Bartoloni, A, Basara, L, Başeğmez-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, M B, Derome, L, Di Falco, S, Di Felice, V, Dimiccoli, F, Díaz, 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, García-López, R J, Gargiulo, C, Gast, H, Gebauer, I, Gervasi, M, Giovacchini, F, Gómez-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, Kounina, 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, Lippert, 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, Mañá, C, Marín, J, Martin, T, Martínez, 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, Conde, A Reina, Rosier-Lees, 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, Acosta, M Vázquez, Vecchi, M, Velasco, M, Vialle, J P, Vizán, 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, Zimmermann, N, Zuccon, P
Lenguaje:eng
Publicado: 2019
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.122.101101
http://cds.cern.ch/record/2686972
Descripción
Sumario:Precision results on cosmic-ray electrons are presented in the energy range from 0.5 GeV to 1.4 TeV based on 28.1×106 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 5σ 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.

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