Change the EAGLE ICs' CFL condition to 0.2. Set the Mg SNII yields back to 2x....

Change the EAGLE ICs' CFL condition to 0.2. Set the Mg SNII yields back to 2x. Set the SNIa rates back to an exponential as in original EAGLE.

examples/EAGLE_ICs/EAGLE_100/eagle_100.yml

@@ -51,7 +51,7 @@ SPH:
   resolution_eta:                    1.2348   # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
   h_min_ratio:                       0.1      # Minimal smoothing in units of softening.
   h_max:                             0.5      # Maximal softening in co-moving internal units.
-  CFL_condition:                     0.1      # Courant-Friedrich-Levy condition for time integration.
+  CFL_condition:                     0.2      # Courant-Friedrich-Levy condition for time integration.
   minimal_temperature:               100.0    # (internal units)
   initial_temperature:               268.7    # (internal units)
   particle_splitting:                1        # Particle splitting is ON
@@ -160,9 +160,10 @@ EAGLEFeedback:
   SNII_energy_fraction_n_0_H_p_cm3: 1.4588          # Pivot point for the birth density dependance of the SNII energy fraction in cm^-3.
   SNII_energy_fraction_n_Z:         0.8686          # Power-law for the metallicity dependance of the SNII energy fraction.
   SNII_energy_fraction_n_n:         0.8686          # Power-law for the birth density dependance of the SNII energy fraction.
-  SNIa_DTD:                         PowerLaw        # Functional form of the SNIa delay time distribution.
+  SNIa_DTD:                         Exponential     # Functional form of the SNIa delay time distribution.
   SNIa_DTD_delay_Gyr:               0.04            # Stellar age after which SNIa start in Gyr (40 Myr corresponds to stars ~ 8 Msun).
-  SNIa_DTD_power_law_norm_p_Msun:   0.0012          # Normalization of the SNIa delay time distribution (in Msun^-1).
+  SNIa_DTD_exp_timescale_Gyr:       2.0             # Time-scale of the exponential decay of the SNIa rates in Gyr.
+  SNIa_DTD_exp_norm_p_Msun:         0.002           # Normalisation of the SNIa rates in inverse solar masses.
   SNIa_energy_erg:                 1.0e51           # Energy of one SNIa explosion in ergs.
   AGB_ejecta_velocity_km_p_s:      10.0             # Velocity of the AGB ejectas in km/s.
   stellar_evolution_age_cut_Gyr:    0.1             # Stellar age in Gyr above which the enrichment is down-sampled.
@@ -173,7 +174,7 @@ EAGLEFeedback:
   SNII_yield_factor_Nitrogen:       1.0             # (Optional) Correction factor to apply to the Nitrogen yield from the SNII channel.
   SNII_yield_factor_Oxygen:         1.0             # (Optional) Correction factor to apply to the Oxygen yield from the SNII channel.
   SNII_yield_factor_Neon:           1.0             # (Optional) Correction factor to apply to the Neon yield from the SNII channel.
-  SNII_yield_factor_Magnesium:      4.0             # (Optional) Correction factor to apply to the Magnesium yield from the SNII channel.
+  SNII_yield_factor_Magnesium:      2.0             # (Optional) Correction factor to apply to the Magnesium yield from the SNII channel.
   SNII_yield_factor_Silicon:        1.0             # (Optional) Correction factor to apply to the Silicon yield from the SNII channel.
   SNII_yield_factor_Iron:           0.5             # (Optional) Correction factor to apply to the Iron yield from the SNII channel.
 

examples/EAGLE_ICs/EAGLE_12/eagle_12.yml

@@ -51,7 +51,7 @@ SPH:
   resolution_eta:                    1.2348   # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
   h_min_ratio:                       0.1      # Minimal smoothing in units of softening.
   h_max:                             0.5      # Maximal softening in co-moving internal units.
-  CFL_condition:                     0.1      # Courant-Friedrich-Levy condition for time integration.
+  CFL_condition:                     0.2      # Courant-Friedrich-Levy condition for time integration.
   minimal_temperature:               100.0    # (internal units)
   initial_temperature:               268.7    # (internal units)
   particle_splitting:                1        # Particle splitting is ON
@@ -159,9 +159,10 @@ EAGLEFeedback:
   SNII_energy_fraction_n_0_H_p_cm3: 1.4588          # Pivot point for the birth density dependance of the SNII energy fraction in cm^-3.
   SNII_energy_fraction_n_Z:         0.8686          # Power-law for the metallicity dependance of the SNII energy fraction.
   SNII_energy_fraction_n_n:         0.8686          # Power-law for the birth density dependance of the SNII energy fraction.
-  SNIa_DTD:                         PowerLaw        # Functional form of the SNIa delay time distribution.
+  SNIa_DTD:                         Exponential     # Functional form of the SNIa delay time distribution.
   SNIa_DTD_delay_Gyr:               0.04            # Stellar age after which SNIa start in Gyr (40 Myr corresponds to stars ~ 8 Msun).
-  SNIa_DTD_power_law_norm_p_Msun:   0.0012          # Normalization of the SNIa delay time distribution (in Msun^-1).
+  SNIa_DTD_exp_timescale_Gyr:       2.0             # Time-scale of the exponential decay of the SNIa rates in Gyr.
+  SNIa_DTD_exp_norm_p_Msun:         0.002           # Normalisation of the SNIa rates in inverse solar masses.
   SNIa_energy_erg:                 1.0e51           # Energy of one SNIa explosion in ergs.
   AGB_ejecta_velocity_km_p_s:      10.0             # Velocity of the AGB ejectas in km/s.
   stellar_evolution_age_cut_Gyr:    0.1             # Stellar age in Gyr above which the enrichment is down-sampled.
@@ -172,7 +173,7 @@ EAGLEFeedback:
   SNII_yield_factor_Nitrogen:       1.0             # (Optional) Correction factor to apply to the Nitrogen yield from the SNII channel.
   SNII_yield_factor_Oxygen:         1.0             # (Optional) Correction factor to apply to the Oxygen yield from the SNII channel.
   SNII_yield_factor_Neon:           1.0             # (Optional) Correction factor to apply to the Neon yield from the SNII channel.
-  SNII_yield_factor_Magnesium:      4.0             # (Optional) Correction factor to apply to the Magnesium yield from the SNII channel.
+  SNII_yield_factor_Magnesium:      2.0             # (Optional) Correction factor to apply to the Magnesium yield from the SNII channel.
   SNII_yield_factor_Silicon:        1.0             # (Optional) Correction factor to apply to the Silicon yield from the SNII channel.
   SNII_yield_factor_Iron:           0.5             # (Optional) Correction factor to apply to the Iron yield from the SNII channel.
 

examples/EAGLE_ICs/EAGLE_25/eagle_25.yml

@@ -51,7 +51,7 @@ SPH:
   resolution_eta:                    1.2348   # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
   h_min_ratio:                       0.1      # Minimal smoothing in units of softening.
   h_max:                             0.5      # Maximal softening in co-moving internal units.
-  CFL_condition:                     0.1      # Courant-Friedrich-Levy condition for time integration.
+  CFL_condition:                     0.2      # Courant-Friedrich-Levy condition for time integration.
   minimal_temperature:               100.0    # (internal units)
   initial_temperature:               268.7    # (internal units)
   particle_splitting:                1        # Particle splitting is ON
@@ -160,9 +160,10 @@ EAGLEFeedback:
   SNII_energy_fraction_n_0_H_p_cm3: 1.4588          # Pivot point for the birth density dependance of the SNII energy fraction in cm^-3.
   SNII_energy_fraction_n_Z:         0.8686          # Power-law for the metallicity dependance of the SNII energy fraction.
   SNII_energy_fraction_n_n:         0.8686          # Power-law for the birth density dependance of the SNII energy fraction.
-  SNIa_DTD:                         PowerLaw        # Functional form of the SNIa delay time distribution.
+  SNIa_DTD:                         Exponential     # Functional form of the SNIa delay time distribution.
   SNIa_DTD_delay_Gyr:               0.04            # Stellar age after which SNIa start in Gyr (40 Myr corresponds to stars ~ 8 Msun).
-  SNIa_DTD_power_law_norm_p_Msun:   0.0012          # Normalization of the SNIa delay time distribution (in Msun^-1).
+  SNIa_DTD_exp_timescale_Gyr:       2.0             # Time-scale of the exponential decay of the SNIa rates in Gyr.
+  SNIa_DTD_exp_norm_p_Msun:         0.002           # Normalisation of the SNIa rates in inverse solar masses.
   SNIa_energy_erg:                 1.0e51           # Energy of one SNIa explosion in ergs.
   AGB_ejecta_velocity_km_p_s:      10.0             # Velocity of the AGB ejectas in km/s.
   stellar_evolution_age_cut_Gyr:    0.1             # Stellar age in Gyr above which the enrichment is down-sampled.
@@ -173,7 +174,7 @@ EAGLEFeedback:
   SNII_yield_factor_Nitrogen:       1.0             # (Optional) Correction factor to apply to the Nitrogen yield from the SNII channel.
   SNII_yield_factor_Oxygen:         1.0             # (Optional) Correction factor to apply to the Oxygen yield from the SNII channel.
   SNII_yield_factor_Neon:           1.0             # (Optional) Correction factor to apply to the Neon yield from the SNII channel.
-  SNII_yield_factor_Magnesium:      4.0             # (Optional) Correction factor to apply to the Magnesium yield from the SNII channel.
+  SNII_yield_factor_Magnesium:      2.0             # (Optional) Correction factor to apply to the Magnesium yield from the SNII channel.
   SNII_yield_factor_Silicon:        1.0             # (Optional) Correction factor to apply to the Silicon yield from the SNII channel.
   SNII_yield_factor_Iron:           0.5             # (Optional) Correction factor to apply to the Iron yield from the SNII channel.
 

examples/EAGLE_ICs/EAGLE_50/eagle_50.yml

@@ -51,7 +51,7 @@ SPH:
   resolution_eta:                    1.2348   # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel).
   h_min_ratio:                       0.1      # Minimal smoothing in units of softening.
   h_max:                             0.5      # Maximal softening in co-moving internal units.
-  CFL_condition:                     0.1      # Courant-Friedrich-Levy condition for time integration.
+  CFL_condition:                     0.2      # Courant-Friedrich-Levy condition for time integration.
   minimal_temperature:               100.0    # (internal units)
   initial_temperature:               268.7    # (internal units)
   particle_splitting:                1        # Particle splitting is ON
@@ -160,9 +160,10 @@ EAGLEFeedback:
   SNII_energy_fraction_n_0_H_p_cm3: 1.4588          # Pivot point for the birth density dependance of the SNII energy fraction in cm^-3.
   SNII_energy_fraction_n_Z:         0.8686          # Power-law for the metallicity dependance of the SNII energy fraction.
   SNII_energy_fraction_n_n:         0.8686          # Power-law for the birth density dependance of the SNII energy fraction.
-  SNIa_DTD:                         PowerLaw        # Functional form of the SNIa delay time distribution.
+  SNIa_DTD:                         Exponential     # Functional form of the SNIa delay time distribution.
   SNIa_DTD_delay_Gyr:               0.04            # Stellar age after which SNIa start in Gyr (40 Myr corresponds to stars ~ 8 Msun).
-  SNIa_DTD_power_law_norm_p_Msun:   0.0012          # Normalization of the SNIa delay time distribution (in Msun^-1).
+  SNIa_DTD_exp_timescale_Gyr:       2.0             # Time-scale of the exponential decay of the SNIa rates in Gyr.
+  SNIa_DTD_exp_norm_p_Msun:         0.002           # Normalisation of the SNIa rates in inverse solar masses.
   SNIa_energy_erg:                 1.0e51           # Energy of one SNIa explosion in ergs.
   AGB_ejecta_velocity_km_p_s:      10.0             # Velocity of the AGB ejectas in km/s.
   stellar_evolution_age_cut_Gyr:    0.1             # Stellar age in Gyr above which the enrichment is down-sampled.
@@ -173,7 +174,7 @@ EAGLEFeedback:
   SNII_yield_factor_Nitrogen:       1.0             # (Optional) Correction factor to apply to the Nitrogen yield from the SNII channel.
   SNII_yield_factor_Oxygen:         1.0             # (Optional) Correction factor to apply to the Oxygen yield from the SNII channel.
   SNII_yield_factor_Neon:           1.0             # (Optional) Correction factor to apply to the Neon yield from the SNII channel.
-  SNII_yield_factor_Magnesium:      4.0             # (Optional) Correction factor to apply to the Magnesium yield from the SNII channel.
+  SNII_yield_factor_Magnesium:      2.0             # (Optional) Correction factor to apply to the Magnesium yield from the SNII channel.
   SNII_yield_factor_Silicon:        1.0             # (Optional) Correction factor to apply to the Silicon yield from the SNII channel.
   SNII_yield_factor_Iron:           0.5             # (Optional) Correction factor to apply to the Iron yield from the SNII channel.
 

examples/EAGLE_ICs/README

@@ -21,11 +21,6 @@ the following changes have been made:
  - The minimal mass of SNII stars has been raised to 8 Msun (from 6).
  - The SNII feedback delay is done by sampling the stellar age
    distribution and not using a fixed delay of 30 Myr any more.
- - The Magnesium yields from SNII stars have been boosted by a
-   factor of 2.
- - The delay time distribution of the SNIa has been changed to a
-   power-law of slope -1 (instead of the exponential model) and
-   the rates have been renormalized.
  - The black hole accretion rate is now limited to 100% of the
    Eddington rate (from 100/h = 150 %).