Influence of Interstellar and Atmospheric Extinction on Light Curves of Eclipsing Binaries |
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| Authors: | A Pr?a T Zwitter |
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| Institution: | (1) Department of Physics, University of Ljubljana, Jadranska, Ljubljana, Slovenia |
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| Abstract: | Interstellar and atmospheric extinctions redden the observational photometric data and they should be handled rigorously.
This paper simulates the effect of reddening for the modest case of two main sequence T
1 = 6500 K and T
2 = 5500 K components of a detached eclipsing binary system. It is shown that simply subtracting a constant from measured magnitudes
(the approach often used in the field of eclipsing binaries) to account for reddening should be avoided. Simplified treatment
of the reddening introduces systematics that reaches ∼0.01 mag for the simulated case, but can be as high as ∼0.2 mag for,
e.g., B8 V-K4 III systems. With rigorous treatment, it is possible to uniquely determine the colour excess value E(B−V) from multi-colour photometric light curves of eclipsing binaries. |
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| Keywords: | binaries: eclipsing ISM: dust extinction atmosphere: scattering stars: fundamental parameters methods: numerical |
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