Angular-momentum profiles at core helium depletion for the primary stars of binaries from our grid that result in double helium star binaries. We show stars of three different initial masses in binaries with similar initial orbital periods at metallicities of Z = Z⊙/ 50,Z⊙/ 20, and Z⊙/ 10. The curves for the specific angular momentum of the last stable orbit for a non-rotating (Schwarzschild) and critically rotating (Kerr) black hole are also included.
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