Figure 1 from Helium Fluxes Measured by the PAMELA Experiment from the Minimum to the Maximum Solar Activity for Solar Cycle 24

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Helium Fluxes Measured by the PAMELA Experiment from the Minimum to the Maximum Solar Activity for Solar Cycle 24

Authors: N. Marcelli, M. Boezio, A. Lenni, W. Menn, R. Munini, O.P. M. Aslam, D. Bisschoff, M.D. Ngobeni, M.S. Potgieter, O. Adriani, G.C. Barbarino, G.A. Bazilevskaya, R. Bellotti, E.A. Bogomolov, M. Bongi, V. Bonvicini, A. Bruno, F. Cafagna, D. Campana, P. Carlson, M. Casolino, G. Castellini, C. De Santis, A.M. Galper, S.V. Koldashov, S. Koldobskiy, A.N. Kvashnin, A.A. Leonov, V.V. Malakhov, L. Marcelli, M. Martucci, A.G. Mayorov, M. Mergè, E. Mocchiutti, A. Monaco, N. Mori, V.V. Mikhailov, G. Osteria, B. Panico, P. Papini, M. Pearce, P. Picozza, M. Ricci, S.B. Ricciarini, M. Simon, A. Sotgiu, R. Sparvoli, P. Spillantini, Y.I. Stozhkov, A. Vacchi, E. Vannuccini, G.I. Vasilyev, S.A. Voronov, Y.T. Yurkin, G. Zampa, and N. Zampa

2022 The Astrophysical Journal Letters 925 L24.

Provider: AAS Journals

Caption: Figure 1.

Left panel: the evolution of the helium energy spectrum as intensities approached the period of maximum solar activity, from 2010 January (violet) to 2014 September (red). Right panel: the ratio of the measured spectra with respect to the spectrum of 2010 January. The color code is the same as the right panel.

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