Cosmic-ray electron-positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope

作者：S. Abdollahi, M. Ackermann, Marco Ajello, W. B. Atwood, L. Baldini, Guido Barbiellini, D. Bastieri, R. Bellazzini, E. D. Bloom, R. Bonino, T. J. Brandt, J. Bregeon, P. Bruel, R. Buehler, R. A. Cameron, R. Caputo, M. Caragiulo, Daniel Castro, E. Cavazzuti, Claudia Cecchi, Alexandre Chekhtman, S. Ciprini, J. Cohen-Tanugi, F. Costanza, A. Cuoco, S. Cutini, Filippo D'Ammando, F. de Palma, R. Desiante, S. W. Digel, Niccolò Di Lalla, Mattia Di Mauro, L. Di Venere, Persis S. Drell, A. Drlica-Wagner, C. Favuzzi, Warren B. Focke, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Giglietto, F. Giordano, M. Giroletti, D. Green, Lucas Guillemot, S. Guiriec, Alice Kust Harding, T. Jogler, G. Jóhannesson, T. Kamae, M. Kuss, G. La Mura, L. Latronico, Francesco Longo, F. Loparco, P. Lubrano, S. Maldera, D. Malyshev, Alberto Manfreda, Mario Nicola Mazziotta, P. F. Michelson, N. Mirabal, W. Mitthumsiri, Tsunefumi Mizuno, A. A. Moiseev, Maria Elena Monzani, Aldo Morselli, Igor V. Moskalenko, Michela Negro, E. Nuss, E. Orlando, D. Paneque, Jeremy S Perkins, M. Pesce-Rollins, Frederic Piron, G. Pivato, T. A. Porter, G. Principe, S. Rainò, R. Rando, M. Razzano, A. Reimer, Olaf Reimer, Carmelo Sgro', D. Simone, E. J. Siskind, F. Spada, Gloria Spandre, Paolo Spinelli, H. Tajima, J. B. Thayer, Luigi Tibaldo, Diego F. Torres, Eleonora Troja, Marion Wood, Aaron Worley, Gabrijela Zaharijaš, S. Zimmer · 发表于：Physical review. D/Physical review. D. · 年份：2017 · DOI：10.1103/physrevd.95.082007 · 被引用次数：211 · 研究领域：Dark Matter and Cosmic Phenomena、Particle physics theoretical and experimental studies、Astrophysics and Cosmic Phenomena

We present a measurement of the cosmic-ray $\mathrm{electron}+\mathrm{positron}$ spectrum between 7 GeV and 2 TeV performed with almost seven years of data collected with the Fermi Large Area Telescope. We find that the spectrum is well fit by a broken power law with a break energy at about 50 GeV. Above 50 GeV, the spectrum is well described by a single power law with a spectral index of $3.07\ifmmode\pm\else\textpm\fi{}0.02\phantom{\rule{0ex}{0ex}}(\mathrm{stat}+\mathrm{syst})\ifmmode\pm\else\textpm\fi{}0.04(\text{energy measurement})$. An exponential cutoff lower than 1.8 TeV is excluded at 95% CL.