Subject: Abstracts from D.C. Heggie

From: "D.C. Heggie" <[email-masked]>
Date: Fri, 30 Jun 95 10:06:27 BST

1.  Statistics of Small-N Simulations

We first review the reasons for carrying out statistical analysis of
results from large numbers of N-body simulations, including a summary
of previous work.  Then we describe some results about the behaviour
of N-body systems which have been acquired by this technique,
including a selection from: (i) the N-dependence of relaxation; (ii)
the effect of anisotropy and core collapse on the escape rate; (iii)
the behaviour of binaries at core bounce and in post-collapse
expansion; (iv) the behaviour of anisotropy and mass segregation
throughout pre- and post-collapse regimes; (v) the effect on the
escape rate of different treatments of a tidal boundary; (vi) the
effect of mass loss through stellar evolution; and (vii) problems
associated with the scaling of N-body data with N.

2.  Effects of Dark Matter [with P.Hut]

We first review reasons why dark matter is an interesting issue in
connection with star clusters.  Next we consider to what extent the
presence of dark matter is either permitted or required by
observations of globular clusters.  Model-dependent and
model-independent ways of tackling this issue are compared. Finally,
the link with the determination of the stellar mass function is
emphasised.