ytree.tree_farm.tree_farm.TreeFarm.trace_descendents

TreeFarm.trace_descendents(halo_type, fields=None, filename=None)

Trace the descendents of all halos.

A merger-tree for all halos will be created, starting with the first halo catalog and moving forward.

halo_type : string

The type of halo, typically “FOF” for FoF groups or “Subfind” for subhalos.

fields : optional, list of strings

List of additional fields to be saved to halo catalogs.

filename : optional, string

Directory in which merger-tree catalogs will be saved.