From 1c65b7f0b0aabb3f3f9e90194e7c04e5e4eaedfd Mon Sep 17 00:00:00 2001
From: Matthieu Schaller <schaller@strw.leidenuniv.nl>
Date: Sat, 19 Oct 2019 17:53:39 +0200
Subject: [PATCH] Minor tweak to the EAGLE softening lengths and better
 explanation comments.

---
 examples/EAGLE_ICs/EAGLE_12/eagle_12.yml | 8 ++++----
 examples/EAGLE_ICs/EAGLE_25/eagle_25.yml | 8 ++++----
 examples/EAGLE_ICs/EAGLE_50/eagle_50.yml | 8 ++++----
 3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/examples/EAGLE_ICs/EAGLE_12/eagle_12.yml b/examples/EAGLE_ICs/EAGLE_12/eagle_12.yml
index aad295fa96..1730802000 100644
--- a/examples/EAGLE_ICs/EAGLE_12/eagle_12.yml
+++ b/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:
diff --git a/examples/EAGLE_ICs/EAGLE_25/eagle_25.yml b/examples/EAGLE_ICs/EAGLE_25/eagle_25.yml
index 7c1ee7305f..62db76840f 100644
--- a/examples/EAGLE_ICs/EAGLE_25/eagle_25.yml
+++ b/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:
diff --git a/examples/EAGLE_ICs/EAGLE_50/eagle_50.yml b/examples/EAGLE_ICs/EAGLE_50/eagle_50.yml
index cfd3674bf5..1a939d8ce1 100644
--- a/examples/EAGLE_ICs/EAGLE_50/eagle_50.yml
+++ b/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:
-- 
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