Derivation of the physical parameters for strong and weak flares from the H line
Semeida, M., Rashed, M. (2016). Derivation of the physical parameters for strong and weak flares from the H line. EKB Journal Management System, 5(1), 48-54. doi: 10.1016/j.nrjag.2016.04.005
M.A. Semeida; M.G. Rashed. "Derivation of the physical parameters for strong and weak flares from the H line". EKB Journal Management System, 5, 1, 2016, 48-54. doi: 10.1016/j.nrjag.2016.04.005
Semeida, M., Rashed, M. (2016). 'Derivation of the physical parameters for strong and weak flares from the H line', EKB Journal Management System, 5(1), pp. 48-54. doi: 10.1016/j.nrjag.2016.04.005
Semeida, M., Rashed, M. Derivation of the physical parameters for strong and weak flares from the H line. EKB Journal Management System, 2016; 5(1): 48-54. doi: 10.1016/j.nrjag.2016.04.005

Derivation of the physical parameters for strong and weak flares from the H line

NRIAG Journal of Astronomy and Geophysics
Volume 5, Issue 1, June 2016, Pages 48-54    PDF (870.28 K)
DOI: 10.1016/j.nrjag.2016.04.005
Authors
M.A. Semeida; M.G. Rashed
Abstract
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.
Keywords
Solar flares; physical parameters; H-alpha; Spectral lines
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