V4142 Sgr: Double periodic variable with an accretor surrounded by the accretion disk’s atmosphere

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Fig. 17.

Test for donor synchronization. Solid black line is given by Eq. (6). The dashed red line represents the obtained mass ratio (q = 0.287) from RVs analysis (synchronous) and the continuum blue line represents the suggested mass ratio (q_theo. = 0.096) given by Eq. (6) (sub-synchronous).

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