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On the Origin of Black Hole Spin in High-mass X-Ray Binaries

  • Authors: Ying Qin, Pablo Marchant, Tassos Fragos, Georges Meynet, and Vicky Kalogera

2019 The Astrophysical Journal Letters 870 L18.

  • Provider: AAS Journals

Caption: Figure 2.

Outcomes of binary systems with a fixed mass ratio of q = 0.4 and different initial orbital periods and primary star masses. The gray squares represent systems with MT rates higher than 10 M yr−1, which we consider as dynamically unstable, the cyan squares represent systems that overflow the second Lagrangian point L2, and the green squares represent models that are overflowing at the zero-age MS (ZAMS). The blue squares represent systems that undergo the Case-A MT, red squares represent systems that undergo the CHE, and orange squares represent models with numerical errors and where the simulation was not completed.

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