Observable detail · COSMOLOGY
H_phys
Jordan-frame Hubble constant
| Prediction | H_E / √P_0 = 73.019 km/s/Mpc |
|---|---|
| Measured | 73.04 ± 1.04 (SH0ES) |
| Residual | 0.02σ match |
| Status | hit |
| Source paper | DCT-COS-01 |
Mechanism
Jordan-frame Hubble constant H_phys = H_E / √P_0 where H_E is the Einstein-frame value (Planck CMB inferred 67.4 km/s/Mpc) and P_0 = 0.851. Conformal-frame mapping in cluster paper DCT-COS-01.
Derivation
Jordan-frame Hubble constant H_phys = H_E / √P_0 where H_E is the Einstein-frame value (Planck CMB inferred 67.4 km/s/Mpc) and P_0 = 0.851. Conformal-frame mapping in cluster paper DCT-COS-01.
The closed-form prediction is
$$ \text{predicted} = H_E / √P_0 = 73.019 km/s/Mpc $$against the measurement 73.04 ± 1.04 (SH0ES), giving residual 0.02σ match.
Python verification
The verification script for this observable is cosmology_tests.py. Run it with python3 cosmology_tests.py to reproduce the canonical DCT result against the public-archive measurement source listed above (Riess et al. 2022 (SH0ES).).
References
- Riess et al. 2022
- Source paper: DCT-COS-01
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