The observable characteristics and subsequent evolution of young stellar populations is
dominated by their massive stars. As our understanding of those massive stars and the …

Close, compact, hierarchical, and multiple stellar systems, ie, multiples having an outer
orbital period from months to a few years, comprise a small but continuously growing group …

A graduate-level textbook on the astrophysics of binary star systems and their evolution
Physics of Binary Star Evolution is an up-to-date textbook on the astrophysics and evolution …

Gaia BHs, black hole (BH) binaries discovered from data base of an astrometric telescope
Gaia, pose a question to the standard binary evolution model. We have assessed whether …

White dwarf (WD) stars evolve simply and predictably, making them reliable age indicators.
However, self-consistent validation of the methods for determining WD total ages has yet to …

Observations suggest that massive stellar triples are common. However, their evolution is
not yet fully understood. We investigate the evolution of hierarchical triples in which the stars …

The theory of stellar escape from globular clusters (GCs) dates back nearly a century,
especially the gradual evaporation of GCs via two-body relaxation coupled with external …

The Gaia mission has detected many white dwarfs (WDs) in binary and triple configurations,
and while observations suggest that triple-stellar systems are common in our Galaxy, not …

Stellar mergers are responsible for a wide variety of phenomena such as rejuvenated blue
stragglers, highly magnetised stars, spectacular transients, iconic nebulae, and stars with …

Be stars make up almost 20 per cent of the B star population, and are rapidly rotating stars
surrounded by a disc; however the origin of this rotation remains unclear. Mass transfer …