The Struve–Sahade effect (S–S effect) occurs in a double-lined spectroscopic binary star system when the strength of the spectral lines of the components varies during the orbital motion. A spectroscopic binary is called double-lined when the absorption lines of both stars can be observed with a spectroscope.
The Struve–Sahade effect (S–S effect) occurs in a double-lined spectroscopic binary star system when the strength of the spectral lines of the components varies during the orbital motion. A spectroscopic binary is called double-lined when the absorption lines of both stars can be observed with a spectroscope.
Source: Wikipedia "Struve–Sahade effect" · CC BY-SA 4.0
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