Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ap%26ss.240..263g&link_type=abstract
Astrophysics and Space Science, Volume 240, Issue 2, pp.263-271
Astronomy and Astrophysics
Astrophysics
6
Scientific paper
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.
Dun Jing-Ping
Gu Xiao-Ma
Li Ke-Jun
Lin Jun
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