The flow field in the sunspot canopy
Aims.We investigate the flow field in the sunspot canopy using simultaneous Stokes vector spectropolarimetry of three sunspots (θ=27°, 50°, 75°) and their surroundings in visible (630.15 and 630.25 nm) and near infrared (1564.8 and 1565.2 nm) neutral iron lines. Methods: .To calibrate the Doppler shifts, we compare an absolute velocity calibration
Rezaei, R. et al.
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2006