Michel Henon's contributions to collisional stellar systems

Understand

The theory of star cluster dynamics was a major topic in H\'enon's early research career.

• Here we summarise his contributions under three headings: (i) the Monte Carlo method, (ii) homological evolution of star clusters, and (iii) escape from star clusters.
• In each case we also trace some aspects of how H\'enon's contributions have been developed or applied in subsequent decades up to the present.
• We also propose that H\'enon's work be commemorated by adopting the names "H\'enon units" and "H\'enon's Principle".