What object stabilizes if the accumulating core mass fails to reach the critical threshold of 0.08 Solar Masses?
Answer
Brown dwarf
The final fate of a condensing core is dictated by its accumulated mass. If the material fails to gather enough mass to reach the critical threshold, estimated to be roughly $0.08$ times the mass of our Sun, the core temperature and pressure will never become sufficient to initiate the sustained nuclear fusion necessary for true starhood. In this scenario, the object stabilizes as a brown dwarf. A brown dwarf is often referred to as a 'failed star' because, although it glows faintly due to leftover heat from its contraction, it cannot sustain the core thermonuclear reactions that define an actual star.
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