Luk'yanyk I. Non-stationary processes in comets: analysis of light curves and spectra

The dissertation contains the results of study of the non-stationary processes in comets. As result of the analysis of the light curves of comets, the connection of the light outbursts and the fluctuations of the bright-ness with interplanetary magnetic field is established. Using spectral observations some results who characterize peculiarities of the splitting of nucleus of the comet С/1999 S4 (LINEAR) are obtained. The removal of luminescent continuum in the spectra of comets С/1999 S4 (LINЕAR) and С/2001 А2 (LINЕAR) is found. The physical characteristics of a neutral atmosphere of comet С/2000 WM1 (LINEAR) are determined. The detailed identification of emission lines in the spectra of these comets is made. Field of use: astrophysics.