trace_descendents(halo_type, fields=None, filename=None)[source]¶
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.