Fig. 6: Quasi-periodic characteristics of synthetic SXR variation.
From: Microwave imaging of quasi-periodic pulsations at flare current sheet
a Temporal evolution of the SXR emission power at 1–8 Å, PSXR. b Temporal evolution of the time derivative of PSXR, dPSXR/dt. c The wavelet power spectrum of the temporal evolution of dPSXR/dt. Same as in Fig. 3, the gray shading denotes the cone of influence (COI), and the black contours enclose the regions where the global (solid line) and local (dashed line) significance is higher than 95%. d The evolution of the number distribution function of the magnetic island flux, \(N\left(\psi,t\right)\), in the integration region, where ψ is the flux of magnetic islands and ψ0 = 1011 Mx cm−1. \(N\left(\psi,t\right)\) is calculated by the same method as in ref. 50.
