Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983azh....60..746k&link_type=abstract
(Astronomicheskii Zhurnal, vol. 60, July-Aug. 1983, p. 746-757) Soviet Astronomy (ISSN 0038-5301), vol. 27, July-Aug. 1983, p. 4
Astronomy and Astrophysics
Astronomy
10
Novae, Stellar Spectrophotometry, Ubv Spectra, Binary Stars, Electrophotometry, Infrared Astronomy, Light Curve, Long Term Effects
Scientific paper
The variable star PU Vul, discovered by Kuwano in 1979, is characterized on the basis of published IR and spectral observations and of UBV photoelectric observations obtained with a Zeiss 60-cm reflector at the Crimean station of the Shternberg State Astronomical Institute during 1979-1982. The data are presented in tables and graphs, and the deep fading observed in 1980-1981, after the 'outburst' of 1977-1979, is described in detail. A binary-system model is proposed to explain the observed behavior of the star, with discussion of the probable nature of the components, the evolution of the hot component and the gas shell, of the cool component, and the mechanism of the fading. It is also considered possible that PU Vul is a single star, but not one of FU Ori type.
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