The two flares of 19 and 30 July 1999 were observed in the H line using the multichannel flare spectrograph (MFS) at the Astronomical Institute in Ondřejov, Czech Republic. We use a modified cloud method to fit the H line profiles which avoids using the background profile. We obtain the four parameters of the two flares: the source function, the optical thickness at line center, the line-of-sight velocity and the Doppler width. The observed asymmetry profiles have been reproduced by the theoretical ones based on our model. A discussion is made about the results of strong and weak flares using the present method.
Semeida, M., & Rashed, M. (2016). Derivation of the physical parameters for strong and weak flares from the H line. NRIAG Journal of Astronomy and Geophysics, 5(1), 48-54. doi: 10.1016/j.nrjag.2016.04.005
MLA
M.A. Semeida; M.G. Rashed. "Derivation of the physical parameters for strong and weak flares from the H line", NRIAG Journal of Astronomy and Geophysics, 5, 1, 2016, 48-54. doi: 10.1016/j.nrjag.2016.04.005
HARVARD
Semeida, M., Rashed, M. (2016). 'Derivation of the physical parameters for strong and weak flares from the H line', NRIAG Journal of Astronomy and Geophysics, 5(1), pp. 48-54. doi: 10.1016/j.nrjag.2016.04.005
VANCOUVER
Semeida, M., Rashed, M. Derivation of the physical parameters for strong and weak flares from the H line. NRIAG Journal of Astronomy and Geophysics, 2016; 5(1): 48-54. doi: 10.1016/j.nrjag.2016.04.005
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