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Observing the Sun with a spectrometer like CDS one can derive the intensity and velocity distribution of the O V 629 M-E line formed at approximately 230 000 K in AR8737. Pixels with Doppler shifts corresponding to a velocity greater than M-140 km/s is fully red/blue. Contours outline areas with velocities exceeding M-150 km/s. The velocities are calculated relative to the part of the solar disk (to the left) that is within the field of view.



The movie shows doppler shifts over a period of time. Animation:(1M)
Last revised on .