The Chemical Composition of an Extrasolar Minor Planet
B. Zuckerman (1), D. Koester (2), C. Melis (1), B. Hansen (1), M. Jura, (1) ((1) UCLA, (2) University of Kiel)
TL;DR
This study analyzes the elemental composition of material in a white dwarf's atmosphere, revealing insights into the makeup of an extrasolar asteroid similar to Earth's planetary system.
Contribution
It provides the first detailed elemental abundance measurements of an extrasolar minor planet, suggesting its similarity to terrestrial planetary bodies.
Findings
Elemental abundances of 17 elements measured
Asteroid composition resembles Earth/Moon system
Supports the idea of terrestrial-like bodies orbiting other stars
Abstract
We report the relative abundances of 17 elements in the atmosphere of the white dwarf star GD 362, material that, very probably, was contained previously in a large asteroid or asteroids with composition similar to the Earth/Moon system. The asteroid may have once been part of a larger parent body not unlike one of the terrestrial planets of our solar system.
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