Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..51..265a&link_type=abstract
Astrophysics and Space Science, vol. 51, no. 2, Oct. 1977, p. 265-282.
Astronomy and Astrophysics
Astronomy
22
Algol, Eclipsing Binary Stars, Infrared Astronomy, Light Curve, Stellar Atmospheres, Stellar Spectrophotometry, Bouguer Law, Broadband, Curve Fitting, Gas Streams, Limb Darkening, Quadratures, Reflectance, Roche Limit
Scientific paper
The basic physical picture of the Algol system is reviewed, and, using collected red and infrared observations, photometric-curve fits are investigated by applying numerical quadratures to determine theoretical light curves appropriate to Roche-model stars. The 'contact' nature of Algol B appears to be confirmed, and effective temperatures of the three components are 11,400 K for component A, 5300 K for component B, and 7600 K for component C. In terms of a Lambert's law approach to the 'reflection effect', the effective heat-albedo should be reduced from unity to one half. It is also found that the averaged 'gravity-darkening coefficient' is close to the value appropriate for a diffusion type of heat-transfer mechanism operating in subphotospheric layers.
Al-Naimiy H. M.
Budding Edwin
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