Open AccessThe evolution of substructure in galaxy, group and cluster haloes – II. Global properties
Author(s) -
Taylor James E.,
Babul Arif
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.09582.x
Subject(s) - physics , substructure , halo , astrophysics , galaxy formation and evolution , cluster (spacecraft) , dark matter , population , dark matter halo , galaxy , structure formation , astronomy , structural engineering , computer science , engineering , programming language , demography , sociology
In a previous paper, we described a new method for including detailed information about substructure in semi‐analytic models of dark matter halo formation based on merger trees. In this paper, we present the basic predictions of our full model of halo formation. We first describe the overall properties of substructure in galaxy, group or cluster haloes at the present day. We then discuss the evolution of substructure, and the effect of the mass‐accretion history of an individual halo on the mass function and orbital grouping of its subhalo population. We show, in particular, that the shape of the subhalo mass function is strongly correlated with the formation epoch of the halo. In a third paper in this series, we will compare the results of our semi‐analytic method with the results of self‐consistent numerical simulations of halo formation.