| Abstract: | The long term evolution of hierarchical three-body stellar systems often results in extreme close approaches of the inner bodies,
which could result in mergers or collisions among stars/planets/compact objects/moons/asteroids/satellites/other?
I will describe new results regarding the theoretical conditions for extreme approaches,
observational studies of the multiplicity of A-stars (the progenitors of most present white dwarfs) and possible connection (or lack of connection) to type Ia supernovae |
