What is the final theoretical remnant of a star less massive than 0.5 solar masses after cooling?

Answer

Helium White Dwarf

Stars less massive than 0.5 solar masses are classified as Red Dwarfs whose Main Sequence periods last trillions of years. After exhausting fuel, they become Helium White Dwarfs, as they never achieve the necessary temperature to fuse helium.

What is the final theoretical remnant of a star less massive than 0.5 solar masses after cooling?
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