Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...204..151h&link_type=abstract
Astrophysical Journal, vol. 204, Feb. 15, 1976, pt. 1, p. 151-159. NASA-supported research.
Astronomy and Astrophysics
Astrophysics
7
Eclipsing Binary Stars, Light Curve, Stellar Luminosity, Energy Sources, Radiative Transfer, Stellar Spectra, Stellar Temperature
Scientific paper
An elementary theory of the ratio of depths of secondary and primary eclipses of a light curve has been proposed for studying the nature of component stars. It has been applied to light curves of Beta Lyrae in the visual, blue, and far-ultraviolet regions with the purpose of investigating the energy sources for the luminosity of the disk surrounding the secondary component and determining the dominant radiative process in the disk. No trace of the spectrum of primary radiation has been found in the disk. Therefore, it is suggested that LTE is the main radiative process in the disk, which radiates at a temperature of approximately 12,000 K in the portion that undergoes eclipse. A small source corresponding to 14,500 K has also been tentatively detected and may represent a hot spot caused by hydrodynamic flow of matter from the primary component to the disk.
Brown David A.
Huang Shizhen
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