Evolution of Close Binaries with particular emphasis on the formation of Algol type systems and Cataclysmic Variables.
The Effects on the evolution of stars placed in high temperature radiation baths such as might be expected in the vicinity of Active Galactic Nuclei.
Production of a simple fast algorithm for evolving stars such that given a mass and age the radius, luminosity and temperature can be calculated in a very short time. This algorithm can be used to look at the statistics of stellar distributions and was applied to the Bright Star Catalogue to test our theory of stellar evolution and to constrain the mass-ratio distribution in binary stars.
The possibility of mass loss being the driving force in the evolution of interacting binaries.
The effects of unresolved binary stars on the determination of the stellar mass function.
The hydrodynamics of spherical accretion that is retarded by its own radiation losses and the possibility of super-Eddington-accretion rates.
A detailed study of the structure and evolutionary state of the star Arcturus as constrained by its pulsations.
The effects of unresolved binaries on the determination of galactic-disc structure.
Accretion on to protostellar cores using a full stellar evolution code.
Magnetic dynamos in rapidly rotating stars and discs and in common envelope and contact binary evolution.
Statistical analysis of various binary classes in order to understand the evolutionary processes relating them.
The effects of the dissipation of tidal energy during capture formation of binaries (particularly in globular clusters) on the state of the stars and the subsequent evolution of the resulting system.
Development of a rapid evolution algorithm for interacting binary stars for use with an N-body code.
Development of a more comprehensive rapid stellar evolution algorithm including a range in composition (metallicity) and the effects of mass loss and binary interactions.
Application of this algorithm to Schmidt plates to study spatial variations in the initial mass function.
Use of this algorithm to study binary statistics.
Application of these results to constrain theories of star formation.
Extension of my previous work on stellar mass functions and the distribution of binary properties to star clusters and galaxies particularly globular clusters and population~II stars.
Analysis of the relation between the properties of binaries in globular clusters, the number of blue stragglers and the colour dispersion on the giant branch.
A more profound examination of the link between magnetic fields and stellar winds in binary stars and protostars.
The means by which magnetic fields in accretion discs can drive outflows in young stars.
The distribution of magnetic fields in cataclysmic-variable stars and single white dwarfs and its relation to magnetic dynamos in common-envelope evolution.
The importance of binary star evolution for Galactic chemical evolution.