Fig. 1: Turbulent power spectra measured by PSP.
From: Mediation of collisionless turbulent dissipation through cyclotron resonance
a, Observed trace of the PSD of magnetic field fluctuations for 747 intervals. Spectra are computed from measured time series using a fast Fourier transform. Frequencies are then normalized to the ion-inertial scale kdi using the Taylor hypothesis. Spectra are coloured from blue to red by sequential occurrence in time on 27 September 2020. Dashed lines show various known spectral scalings: k−5/3, k−8/3 and k−4. b, Circularly polarized power normalized to trace power spectra computed from a wavelet transform. Frequencies are normalized to kdi using the Taylor hypothesis. The solid vertical black line is an approximate lower-bound cutoff of the circularly polarized power kcdi = 0.35. The blue line is the average position of the ion gyroscale kρi.
