Observable detail · GALACTIC
M_lens / M_dyn cluster turnover
| Prediction | Peak 1.30 at z ~ 1.5 |
|---|---|
| Measured | Awaiting Euclid 2027–2029 |
| Residual | open |
| Status | open |
| Source paper | DCT-DM-01 |
Mechanism
Avrami crystallisation profile of the tie field gives a peak in lensing-to-dynamical mass ratio at the redshift where P passes through P_0. For canonical parameters this places the peak at z ~ 1.5, peak amplitude 1.30.
Derivation
Avrami crystallisation profile of the tie field gives a peak in lensing-to-dynamical mass ratio at the redshift where P passes through P_0. For canonical parameters this places the peak at z ~ 1.5, peak amplitude 1.30.
The closed-form prediction is
$$ \text{predicted} = Peak 1.30 at z ~ 1.5 $$against the measurement Awaiting Euclid 2027–2029, giving residual open.
Python verification
The verification script for this observable is astrophysical_tests.py. Run it with python3 astrophysical_tests.py to reproduce the canonical DCT result against the public-archive measurement source listed above (Walmsley et al. 2025 Euclid Q1 (first-look); Euclid DR1 2027–2029 decisive.).
References
- Walmsley et al. 2025
- Source paper: DCT-DM-01
Back to all observables or the predictions table.