Fig. 4
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Relation between the semi-major axis and mass ratio for the companions of the young association stars discovered through Gaia PMa, RUWE, or a variation in RVs that are not visual binaries or do not have an orbit determination. Filled blue circles are companions selected on the basis of the value of RUWE > 1.4; filled red squares are those selected from S /N(PMa) > 3; filled green triangles are those selected from RVs.
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