ytree.tree_farm.ancestry_short.above_mass_fraction

ytree.tree_farm.ancestry_short.above_mass_fraction(halo, ancestor, fraction)

Return only the most massive ancestor.

Parameters:
  • halo (halo data container) – Data container of the descendent halo.
  • ancestor (halo data container) – Data containers for the ancestor halo.
Returns:

Return type:

True or False