MULTI-CLOUD MODEL (MCM) METHOD AND ITS APPLICATIONS TO THE STUDY ON ASYMMETRIC SPECTRAL PROFILES

A method of 'multi-cloud model' (MCM) is proposed in this paper in ord er to research asymmetric profiles of spectral line formed by solar di screte active objects aligned along the line-of-sight direction. Based on the MCM method, under the conditions of certain assumptions and ap proximations, the line-of-sight velocity V and three other physical pa rameter approximation values, (i.e. Doppler width Delta lambda(D), sou rce function S and optical depth at line center tau(O)) within differe nt 'clouds' may be derived simultaneously by fitting both profiles the oretical and observational. An application example of the method with m = 3 shows that MCM method is suitable to measure the velocity fields of multi-object at the same time from their non-Gaussian profiles of complex. The V and Delta lambda(D) derived from the method are reliabl e, S and tau(O) are approximation. An influence of the variations of i nitial values in the parameter on the solution is given as well.