Analysis of observations of the dwarf nova pegasi 2010 |
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| Authors: | V V Shimansky A A Mitrofanova N V Borisov M M Gabdeev |
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| Institution: | 11116. Kazan Federal University, Kazan, Russia
21116. Special Astrophysical Observatory, Nizhny Arkhyz, Karachai-Cherkess Republic, Russia
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| Abstract: | Analysis of photometric and spectroscopic observations of GSC 02197-00886 at the outburst maximum (on May 8, 2010) and at the stage of relaxation towards the quiescent (on August 4, 2010) was performed. Radiation of an optically thick accretion disc with a hot boundary layer dominates the spectra, which are consistent with the spectra of a WZ Sge-type dwarf novae. In the relaxation phase, an optically thin accretion disc with radiation in the HI and HeI emission lines is observed against the background of the absorption spectrum of a white dwarf. The parameters of GSC 02197-00886, which were determined by combining the radial velocities of the components with the assumption that the secondary component is close to mainsequence stars, differ significantly from the parameters that characterize other WZ Sge-type systems. We hypothesize that the secondary component was excited in the course of the outburst and experienced long-lasting relaxation towards the main-sequence state. |
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