Binary orbital evolution driven by a circumbinary disc

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Fig. 13.

Specific angular momentum j_s transferred to the binary as a function of the disc viscosity for a mass ratio q = 1.0 and different aspect ratios. For q = 1, the critical rate is given by j_s, crit = 3/8. We display the results for the two different codes RH2D (crosses, solid lines) and PLUTO (asterisks, dashed lines).

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