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No Evidence that the Majority of Black Holes in Binaries Have Zero Spin

• Authors: Thomas A. Callister, Simona J. Miller, Katerina Chatziioannou, Will M. Farr

Thomas A. Callister et al 2022 The Astrophysical Journal Letters 937 .

• Provider: AAS Journals

Caption: Figure 7.

Posterior for the first percentile (χ eff,1%) of the χ eff distributions implied by each of our component spin models, as shown in the right-hand column of Figure 5. The median values and 90% credible intervals for χ eff,1% are also reported in Table 1. Each of our component spin models require the binary black hole population to contain spins misaligned by more than 90° relative to their Newtonian orbital angular momentum. Correspondingly, χ eff,1% is inferred to likely (although not necessarily) be negative. The χ eff,1% values recovered here are consistent with the minimum χ eff values measured by Abbott et al. (2021a, 2021b).