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Fig. 4

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Calculated amounts of mass lost by a binary with a 7 M primary at birth undergoing strong tidal interaction during its evolution. The total amount of lost mass ΔM is on the vertical axis, and the initial orbital period is on the horizontal axis. Calculated cases are indicated by filled circles. Binaries starting with an initial mass ratio q = 0.4 are connected by a long-dashed line, those with q = 0.6 by a dashed line, and those with q = 0.9 by a solid line.

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