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We selected three double-lined spectroscopic binary systems which haveextreme mass ratios, if measured using the Wilson method. We analysed mediumresolution spectroscopic observations and space-based photometry and find thatall these systems are not SB2, but rather triple systems and a chance alignmentof another star with SB1 that have an unseen component. Therefore suspiciousmass ratios determined by the Wilson method for some double-lined spectroscopicbinary systems aren't correct as these systems are more complex.

Spectroscopic triples and a chance alignment. A solution for a problem of suspicious mass ratios for SB2s from Wilson method