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Explore the limitations of classical approaches to understanding massive binary star interactions through observational evidence from stripped stars in binary systems in this 16-minute conference talk. Examine how recent gravitational wave detections, Gaia observations of dormant black holes, microlensing studies, and time domain surveys are revealing new stellar mass black hole populations that challenge existing theoretical frameworks. Discover how these multi-faceted observations are compelling astronomers to reassess current understanding of stellar black hole lifecycles, from the complex evolution of massive star progenitors through core collapse events to their final states as either dormant or accreting black holes. Learn about the observational evidence that questions traditional models of binary evolution and the implications for predicting gravitational wave sources from merging black hole systems.
