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-rw-r--r--fg21sim/extragalactic/clusters/halo.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/fg21sim/extragalactic/clusters/halo.py b/fg21sim/extragalactic/clusters/halo.py
index 9c030a5..7230a81 100644
--- a/fg21sim/extragalactic/clusters/halo.py
+++ b/fg21sim/extragalactic/clusters/halo.py
@@ -145,6 +145,12 @@ class RadioHalo:
@property
def time_crossing(self):
+ """
+ The time duration of the sub-cluster crossing the main cluster,
+ which is also used to approximate the merging time, during which
+ the turbulence acceleration is regarded as effective.
+ Unit: [Gyr]
+ """
return helper.time_crossing(self.M_main, self.M_sub,
z=self.z_merger)