On Alfvénic turbulence of solar wind streams observed by Solar Orbiter during March 2022 perihelion and their source regions

Open Access

Fig. 13.

Histograms of the drift speed normalized to the Alfvén speed. In particular, the blue line shows that of the proton beam respect to proton core, V_{D_b}^p/V_A while the red line shows that of alpha particle respect to proton core, $V_{D}^{α} / V_{A}$ $V^{\alpha}_{\mathrm{D}}/V_{\mathrm{A}}$ .

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