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 Δλ D , source functionS and optical depth at line center τ0) 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 Δλ D derived from the method are reliable,S and τ0 are approximation. An influence of the variations of initial values in the parameter on the solution is given as well.
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Gu, XM., Lin, J., Li, KJ. et al. Multi-cloud model (MCM) method and its applications to the study on asymmetric spectral profiles. Astrophys Space Sci 240, 263–271 (1996). https://doi.org/10.1007/BF00639591
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DOI: https://doi.org/10.1007/BF00639591