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Table A.2.
Summary of parameters in MULTI PEAK model.
| Parameter | Description | Prior | |
|---|---|---|---|
| α | Spectral index for the power-law of the m1 distribution. | U(-4, 12) | |
| mmin [M⊙] | Minimum mass of the power-law component of the m1 distribution. | U(2, 10) | |
| mmax [M⊙] | Maximum mass of the power-law component of the m1 distribution. | U(30, 100) | |
| β | Spectral index for the power-law of the q distribution paired with the power law component of the m1 distribution. | U(-4, 12) | |
| fpeaks (or λ) | Fraction of BHs in the Gaussian components of the m1 distribution. | U(0, 1) | |
| f1 (or λ1) | Fraction of BHs in the lower-mass Gaussian component of the Gaussian components of the m1 distribution. | U(0, 1) | |
| μm, 1 [M⊙] | Mean of the lower-mass Gaussian component in the m1 distribution. | U(5, 20) | |
| σm, 1 [M⊙] | Width of the lower-mass Gaussian component in the m1 distribution. | U(1,5) | |
| μm, 2 [M⊙] | Mean of the upper-mass Gaussian component in the m1 distribution. | U(20, 50) | |
| σm, 2 [M⊙] | Width of the upper-mass Gaussian component in the m1 distribution. | U(1, 10) | |
Notes. This model, with similar prior ranges, was the most preferred parametric model used in Abbott et al. (2023b); see Appendix D. The minimum and maximum of the Gaussian components are equivalent to the minimum and maximum of the power law component.
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