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The Pitch-angle Distributions of Suprathermal Ions near an Interplanetary Shock

  • Authors: Liu Yang, Lars Berger, Robert F. Wimmer-Schweingruber, Linghua Wang, Jia Yu, Antoinette B. Galvin, and Eberhard Möbius

2020 The Astrophysical Journal Letters 888 L22.

  • Provider: AAS Journals

Caption: Figure 5.

(a)–(c) Normalized PADs of ∼10–40 keV/nuc H+, He2+ and ∼8–20 keV/nuc He+ in “D2” (a), “D1” (b), and “U2” (c) indicated in Figure 2. The estimated statistical errors are shown. (d)–(f) Comparison of the PADs observed during the upstream intervals “U1” and “U2” for He2+ (d), He+ (e), and H+ (f). For each ion species, the PSDs in “U1” and “U2” are both normalized to the maximum PSD observed in “U2,” shown as solid lines. In order to compare the width of the H+ beam, the PSDs in “U1” are further normalized to the PSD at −0.5 < μ < −0.3 in “U2,” shown as the dashed line in (f). The estimated statistical errors are also shown.

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