Commit a3ff381e authored by Matthieu Schaller's avatar Matthieu Schaller
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Clarify the possible temperature discrepancy between the entropy floor and the...

Clarify the possible temperature discrepancy between the entropy floor and the actual gas temperature in the RTD.
parent 930027bb
......@@ -62,12 +62,21 @@ EAGLE run, that section of the parameter file reads:
Jeans_density_threshold_H_p_cm3: 0.1 # Physical density above which the EAGLE Jeans limiter entropy floor kicks in, expressed in Hydrogen atoms per cm^3.
Jeans_over_density_threshold: 10. # Overdensity above which the EAGLE Jeans limiter entropy floor can kick in.
Jeans_temperature_norm_K: 8000 # Temperature of the EAGLE Jeans limiter entropy floor at the density threshold, expressed in Kelvin.
Jeans_gamma_effective: 1.3333333 # Slope the of the EAGLE Jeans limiter entropy floor
Jeans_gamma_effective: 1.3333333 # Slope of the EAGLE Jeans limiter entropy floor
Cool_density_threshold_H_p_cm3: 1e-5 # Physical density above which the EAGLE Cool limiter entropy floor kicks in, expressed in Hydrogen atoms per cm^3.
Cool_over_density_threshold: 10. # Overdensity above which the EAGLE Cool limiter entropy floor can kick in.
Cool_temperature_norm_K: 8000 # Temperature of the EAGLE Cool limiter entropy floor at the density threshold, expressed in Kelvin.
Cool_gamma_effective: 1. # Slope the of the EAGLE Cool limiter entropy floor
Cool_gamma_effective: 1. # Slope of the EAGLE Cool limiter entropy floor
SWIFT will convert the temperature normalisations and Hydrogen number
density thresholds into internal energies and densities respectively
assuming a neutral gas with primoridal abundance pattern. This implies
that the floor may not be exactly at the position given in the YAML
file if the gas has different properties. This is especially the case
for the temperature limit which will often be lower than the imposed
floor by a factor :math:`\frac{\mu_{\rm neutral}}{\mu_{ionised}}
\approx \frac{1.22}{0.59} \approx 2` due to the different ionisation
states of the gas.
Note that the model only makes sense if the ``Cool`` threshold is at a lower
density than the ``Jeans`` threshold.
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