The dynamic of recombination is determined now by the underequilibrium Lyman quanta conversion rate. The constructing of synthetic spectrum demands of profile calculating according to the equation from Bernshtein et al. Then we must allocate rightly the central frequencies of profiles on appropriate places of spectrum where we are observing them today with . A summarizing of different we must conduct, taking into account that . Certainly it is important to take into consideration an optical depth due to dissipation processes , and to multiplicate initial profiles on .
Lines contrast for non-equlibrium case.
We received the set of profiles for different parameters . The width of obtained profiles vary from to in relation to parameters. It is easy to calculate what the distance between the neighbouring lines is ought to be equal. It is clear that the neighbouring profiles will be put one onto another from a certain , and synthetic spectrum will be smooth in that wavelength band. Moreover, we must take into account that in forming of spectra take part not only main lines with but secondary , which have an amplitude only in 2-4 times less and fill up the frequency axis very closely.