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Stellar Separation Shapes Spin–Orbit Alignment in Visual Binaries

  • Authors: Michael Poon, Dang Pham, Marta L. Bryan, Hanno Rein, Jiayin Dong

Michael Poon et al 2026 The Astrophysical Journal Letters 1002 .

  • Provider: AAS Journals

Caption: Figure 1.

Fisher distribution for several values of κ, showing the resulting spin–orbit angle ψ probability density functions. Small κ values produce nearly isotropic distributions, whereas large κ values indicate strong alignment.

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