Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ssrv...30..213g&link_type=abstract
(European Space Agency, ESLAB Symposium on X-ray Astronomy, 15th, Amsterdam, Netherlands, June 22-26, 1981.) Space Science Revie
Astronomy and Astrophysics
Astronomy
4
Novae, Periodic Variations, Radiant Flux Density, Stellar Spectrophotometry, White Dwarf Stars, Light Curve, Stellar Mass Accretion, Stellar Models, Stellar Temperature
Scientific paper
High speed photometry of the dwarf nova SS Cygni during the November 1973 outburst reveals the presence of rapid oscillations over an interval of four days. The period of the oscillations ranged from a minimum of 8.96 sec to a maximum of 9.91 sec. The amplitudes of the optical pulsations are consistent with the upper limit estimated by Cardova et al. (1980), and reach a maximum at the maximum of the outburst. It is proposed that the white dwarf may be heated directly by surrounding luminous material, as by accretion. The variation of the rapid oscillation periods in SS Cyg has the same trend as AH Her (Hildebrand et al., 1980), from which it is concluded that the temperature is minimum at the peak of the outburst. Results also support the inverse relation between outburst luminosity and oscillation period as a general property of the cataclysmic variables (Nather and Robinson, 1974; Neva and Sadeh, 1978).
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