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Presentation #104.01 in the session “An Exploration of Thorne-Zytkow Objects: TZOs, Theory and Candidates (Meeting-in-a-Meeting)”.
In 1973, much influenced by Bohdan Paczynski, Anna Zytkow and I embarked on a theoretical study of hypothetical red supergiant stars with neutron-star cores. In this short talk I will recount the history of how this project came to be, some details of how we carried it out as a Polish-American collaboration in the depths of the Cold War, and some details of our TZO models and predictions.