Cosmic Diamond: Astronomers Discover White Dwarf Star Undergoing Crystallization

Astronomers have discovered a white dwarf star just 104 light-years away that is undergoing a fascinating transformation into a “cosmic diamond.” The white dwarf, composed of carbon and metallic oxygen, is gradually crystallizing and becoming denser at its core. This discovery, detailed in a paper accepted into the Monthly Notices of the Royal Astronomical Society, marks the first time a crystallizing white dwarf’s age has been externally constrained. The presence of three companion stars in the system allowed astronomers to estimate a cooling delay caused by core crystallization. This finding opens up new possibilities for studying and benchmarking white dwarf crystallization models.


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