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Fig. 8.

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Post-disruption normalized specific orbital energies of the star-BH system, εorb, for a star of mass 1 M (left) and 0.5 M (right) initially in a parabolic orbit, due to a BH of mass 10 M (top) and 40 M (bottom), as a function of impact parameter b and MS age (Hc abundance). The dashed line represents parabolic orbits and separates the parameter space into bound (eccentric) and unbound (hyperbolic) orbits. When mass loss is relatively low, a lower value of b generally results in more negative εorb in the case of 1 M star. This trend continues for the TAMS star. However, for the ZAMS and MAMS stars, significant mass losses can reverse this trend, with hyperbolic orbits also being a possibility (e.g., 1 M ZAMS star and 40 M BH mass with b < 1.00) 0.5 M stars, on the other hand, can become unbound for larger b, with boundedness also depending on the mass of the BH.

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