Multi-line two-dimensional spectroscopy of a limb flare

We present the result of a preliminary analysis of the 2D spectra of Hα and Caii λ8542 for a limb flare on 11 November, 1998. Near the top of the flaring loop, the H α line is extraordinarily broadened. The effect of line opacity (or the saturation of line core) cannot fully account for the observed line width since it requires an extremely high loop… CONTINUE READING