Some Problems of Asymmetry of Coronal Spectral Lines

In the study of the asymmetry of the coronal lines researcher trying to determine as accurately as possible the location of the center line. In this paper we investigate the influence of the secondary component on the position of the center of the main profile and the effect of the erroneous position of the center on the value of the asymmetry; It is shown that the secondary profile can move the center of the main profile by the value < 1 km /s Further, it is shown that an erroneous position of the center of the profile by an amount of up to 5 km / sec can change the value of the asymmetry several times. A method for determining the center of the observed asymmetric profile was proposed, the essence of which is as follows: Taking the main profile as Gaussian, they write Doppler expressions for the four points of the red wing; from this expression, it can calculate the position of the center.