Minor tweak to the EAGLE softening lengths and better explanation comments.

examples/EAGLE_ICs/EAGLE_12/eagle_12.yml

@@ -40,10 +40,10 @@ Gravity:
   eta:                    0.025     # Constant dimensionless multiplier for time integration.
   theta:                  0.7       # Opening angle (Multipole acceptance criterion)
   mesh_side_length:       64
-  comoving_DM_softening:         0.0026994 # Comoving DM softening length (in internal units).
-  max_physical_DM_softening:     0.0007    # Max physical DM softening length (in internal units).
-  comoving_baryon_softening:     0.0026994 # Comoving DM softening length (in internal units).
-  max_physical_baryon_softening: 0.0007    # Max physical DM softening length (in internal units).
+  comoving_DM_softening:         0.0026596 # Comoving softening for DM: 1/25th of mean inter-particle separation = 2.6596 (comoving) kpc.
+  max_physical_DM_softening:     0.0007    # Physical softening for DM: 700 (physical) pc.
+  comoving_baryon_softening:     0.0026596 # Comoving softening for baryons: 1/25th of mean inter-particle separation = 2.6596 (comoving) kpc.
+  max_physical_baryon_softening: 0.0007    # Physical softening for baryons: 700 (physical) pc.
   
 # Parameters for the hydrodynamics scheme
 SPH:

examples/EAGLE_ICs/EAGLE_25/eagle_25.yml

@@ -40,10 +40,10 @@ Gravity:
   eta:                    0.025     # Constant dimensionless multiplier for time integration.
   theta:                  0.7       # Opening angle (Multipole acceptance criterion)
   mesh_side_length:       128
-  comoving_DM_softening:         0.0026994 # Comoving DM softening length (in internal units).
-  max_physical_DM_softening:     0.0007    # Max physical DM softening length (in internal units).
-  comoving_baryon_softening:     0.0026994 # Comoving DM softening length (in internal units).
-  max_physical_baryon_softening: 0.0007    # Max physical DM softening length (in internal units).
+  comoving_DM_softening:         0.0026596 # Comoving softening for DM: 1/25th of mean inter-particle separation = 2.6596 (comoving) kpc.
+  max_physical_DM_softening:     0.0007    # Physical softening for DM: 700 (physical) pc.
+  comoving_baryon_softening:     0.0026596 # Comoving softening for baryons: 1/25th of mean inter-particle separation = 2.6596 (comoving) kpc.
+  max_physical_baryon_softening: 0.0007    # Physical softening for baryons: 700 (physical) pc.
   
 # Parameters for the hydrodynamics scheme
 SPH:

examples/EAGLE_ICs/EAGLE_50/eagle_50.yml

@@ -40,10 +40,10 @@ Gravity:
   eta:                    0.025     # Constant dimensionless multiplier for time integration.
   theta:                  0.7       # Opening angle (Multipole acceptance criterion)
   mesh_side_length:       256
-  comoving_DM_softening:         0.0026994 # Comoving DM softening length (in internal units).
-  max_physical_DM_softening:     0.0007    # Max physical DM softening length (in internal units).
-  comoving_baryon_softening:     0.0026994 # Comoving DM softening length (in internal units).
-  max_physical_baryon_softening: 0.0007    # Max physical DM softening length (in internal units).
+  comoving_DM_softening:         0.0026596 # Comoving softening for DM: 1/25th of mean inter-particle separation = 2.6596 (comoving) kpc.
+  max_physical_DM_softening:     0.0007    # Physical softening for DM: 700 (physical) pc.
+  comoving_baryon_softening:     0.0026596 # Comoving softening for baryons: 1/25th of mean inter-particle separation = 2.6596 (comoving) kpc.
+  max_physical_baryon_softening: 0.0007    # Physical softening for baryons: 700 (physical) pc.
   
 # Parameters for the hydrodynamics scheme
 SPH: