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Gravitational-wave observations have revealed the population of stellar remnants from a new angle. Yet their stellar progenitors remain uncertain, in particular in the case of black holes. At least a fraction of these stars is believed to form in isolated binary systems. In this talk, I will discuss how binary mass transfer affects the late evolution and final fate of massive stars, and discuss consequences for supernovae, black hole formation, and gravitational-wave observations. Finally, I will highlight important uncertainties in stellar physics that affect these outcomes, and how these can be constrained from observations.
Evan O'Connor (speaker host), Ragnhild Lunnan (speaker host), Alex Burgman (OKC colloquium coordinator)