A main-sequence star of 8.5 solar masses can become a white dwarf by

Question

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When a main-sequence star of 8.5 solar masses loses mass in a close binary system, its core becomes exposed and it continues to fuse hydrogen, producing more helium. This causes the outer layers to expand, cool, and become a red giant. Eventually, the star sheds its outer layers and becomes a white dwarf. If the star were to gain mass or remain at 8.5 solar masses, it would follow a different evolutionary path, potentially leading to a supernova. Exceeding the Chandrasekhar limit, which is 1.4 solar masses, would also lead to a supernova.

A Main-Sequence Star of 8