Figure 3 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 3.

Time profiles of proton-to-helium ratio for the five rigidity intervals specified in the legend. The error bars are the quadratic sum of statistical and systematic errors. After 2009 the data points cover nine Carrington rotation time periods. The lines and P₀ parameters resulting from the fit of a constant in each rigidity bin in the solar minimum (solid line) and maximum (dashed line) periods are also shown.

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