White Dwarf Spotted Eating Planetary Debris astronomy space science
, which is among the 100 closest white dwarfs. Their results are the first direct measurement of the accretion of rocky material onto a white dwarf.
This plasma, with a temperature between 100,000 K to one million K, then settles on the surface, and as it cools it emits X-rays that can be detected. “These are numerical models that calculate how quickly an element sinks out of the atmosphere into the star, and that tells you how much is falling into the atmosphere as an accretion rate.”
With Chandra’s improved angular resolution over other telescopes, they could isolate the target star from other X-ray sources and viewed, for the first time, X-rays from an isolated white dwarf.
France Dernières Nouvelles, France Actualités
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