Metal-Scarred Cannibal Star: A Celestial Phenomenon Unprecedented in Astronomy

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Source: SciTechDaily
Metal-Scarred Cannibal Star: A Celestial Phenomenon Unprecedented in Astronomy
Photo: SciTechDaily
TL;DR

Astronomers using ESO's VLT have discovered a scar on the surface of a white dwarf star, WD 0816-310, caused by ingesting planetary debris, indicating the role of the star's magnetic field in this process. The scar is a concentration of metals from a planetary fragment, possibly as large as Vesta, and is located on one of the star's magnetic poles. This unique discovery sheds light on the dynamics of planetary systems even after the death of a star and provides insights into the bulk composition of exoplanets.

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