Multi-cloud model (MCM) method and its applications to the study on asymmetric spectral profiles |
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| Authors: | Xiao-Ma Gu Jun Lin Ke-Jun Li Jing-Ping Dun |
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| Institution: | (1) CCAST (World Laboratory), P.O. Box 8730, 100080 Beijing;(2) Yunnan Observatory, P.O. Box 110, 650011 Kunming, YN, China |
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| Abstract: | A method of  multi-cloud model (MCM) is proposed in this paper in order to research asymmetric profiles of spectral line formed by solar discrete active objects aligned along the line-of-sight difection. Based on the MCM method, under the conditions of certain assumptions and approximations, the line-of-sight velocityV and three other physical parameter approximation values, (i.e. Doppler width  
D
, source functionS and optical depth at line center  0) within different clouds may be derived simultaneously by fitting both profiles theoretical and observational. An application example of the method withm=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. TheV and
D
derived from the method are reliable,S and 0 are approximation. An influence of the variations of initial values in the parameter on the solution is given as well. |
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