Other
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....109..791k&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 109, no. 2, p. 791-796
Other
Algol, Atmospheric Effects, Eclipsing Binary Stars, Light Curve, Stellar Atmospheres, Stellar Color, Stellar Temperature, Temperature Effects, Astronomical Photometry, Fourier Analysis, Photoelectricity
Scientific paper
The largest systematic error in the differential photoelectric photometry of the eclipsing binary, Algol, has appeared to be the atmospheric and temperture effects arising from the color difference between program star and comparison star. On the light curve, the maximum difference in magnitude obtained by using individual extinction coefficients of comparsion stars proved to be about 0.08 mag and the temperature effect was about 0.01-0.02 mag in B and V bands. After correction of atmospheric and temperature effects, the shapes and the depths of the primary minimum of light curves for two comparison stars (pi Per: A2 IV, omega Per: K1 III) became similar to each other. The result of Fourier analysis of the Algol light curve showed that the atmospheric and temperature effects influenced the solution of the light curve. That is, the reflection effect (delta l) obtained from 'Algol+w omega Per (K1 III)' became about 57% and 11% larger than the reflection effect (delta l) obtained from 'Algol+pi Per (A2 IV), for the B and V filters, respectively. However, the difference of reflection effect by the selection of the comparison stars was nearly removed, after the atmospheric effect and temperature effect were corrected.
Kim Hee-Soo
Park Hong-Suh
Park In Hee
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