Science
Alkali Metals from Rocky Planets Found in Atmospheres of Nearby White Dwarfs | Astronomy – Sci-News.com
Astronomers have detected lithium in the atmospheres of four cool and old white dwarfs, of which one also displayed atmospheric potassium.
Astronomers have detected lithium in the atmospheres of four cool and old white dwarfs, of which one also displayed atmospheric potassium. The relative abundances of these two alkali elements with respect to sodium and calcium strongly suggest that all four stars have accreted fragments of rocky planets similar to Earth and Mars.
Remnants of planetary crust disintegrating under the tidal forces around a cool white dwarf; material in the disk becomes vaporized close to the central star and flows…
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