(a) LOS velocities calculated from the double Gaussian fitting method (stars) and from the RB asymmetry analysis (diamonds) for O III 52.57 nm (yellow), O V 62.96 nm (green), and Ne VII 46.52 nm (pink). The vertical red dashed line indicates the time of the flare’s peak. (b) A sketch of the full velocity calculation on the ecliptic plane for the mass ejection. (c) A snapshot of the full velocity calculation for the ejecta in 3D space. The yellow plane represents the ecliptic plane. The red/green/blue sphere shows the location of the Sun/Earth/STEREO-A. The arrows indicate the velocity vectors and the corresponding speed is labeled at the header of each arrow. A 3D interactive version of panel (c) is available online and is created by Plotly. One can zoom in and rotate the 3D plot using the toolbar located at the upper right corner of the figure. The interactive version provides a better understanding of the direction of the bulk motion of the ejecta in 3D space.
An interactive version of this figure is available in the online journal.