Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984azh....61..521g&link_type=abstract
(Astronomicheskii Zhurnal, vol. 61, May-June 1984, p. 521-529) Soviet Astronomy (ISSN 0038-5301), vol. 28, May-June 1984, p. 305
Astronomy and Astrophysics
Astronomy
1
A Stars, Electron Energy, Spectral Energy Distribution, Stellar Envelopes, Supergiant Stars, Infrared Astronomy, Stellar Spectrophotometry, Stellar Temperature
Scientific paper
Observations of Alpha Cyg at 320-1080 nm and of Nu Cep at 320-760 nm, obtained using concave-grating Seya-Namioka spectrophotometers on the 48-cm AZT-14 reflector at the Crimean station of the Shternberg State Astronomical Institute during 1978-1979, are reported. The relative spectral energy distributions are presented in tables and graphs and compared with the results of model computations. The electron temperatures of the stellar envelopes are determined on the basis of the 320-360-nm data and found to be 12,500 K for Alpha Cyg and 11,000 K for Nu Cep, as compared to the effective temperature, 8500 K for both stars. The Alpha Cyg envelope is shown to contain higher-temperature (10,000-20,000-K) regions producing a marked IR excess.
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