Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...157..163v&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 157, no. 1, March 1986, p. 163-170.
Astronomy and Astrophysics
Astrophysics
14
B Stars, Early Stars, O Stars, Spectrum Analysis, Stellar Luminosity, Variable Stars, Visible Spectrum, A Stars, Hertzsprung-Russell Diagram, Interstellar Extinction, Stellar Color, Stellar Gravitation, Stellar Temperature, Supergiant Stars, Ubv Spectra
Scientific paper
The optical microvariations of eight high luminous stars, five of type O, two of type B, and one of type A are analyzed. The reddening, temperatures, gravities, and characteristic periods for the stars are estimated. The changes in the light and color curves are discussed. The amplitude-wavelength relation is studied. It is observed that seven of the stars are variable and characteristic periods for only three of the stars are detected in the light curve. The data reveal that the amplitudes of light variations are largest in the ultraviolet for BA type supergiants; for some O type stars there is little difference between the amplitudes at short and long wavelengths.
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