Accreting millisecond X-ray pulsars (AMXPs)
Our hero, Dr. Astrid, is studying one of these tiny stars, XTE J1751-305 (lets just call it "Sparky"). She discovers that Sparky's companion, let's say "Bulb," is going faster and faster because of all the glueing on
Technical definition
A class of compact binary systems characterized by strong X-ray emission due to accretion onto a rapidly rotating neutron star.