Exoplanets in debris disks
Debris disks around main-sequence stars are tenuous belts of dust thought to be produced when asteroids or other planetesimals collide and fragment. They are common: more than about a quarter of all main-sequence stars have debris disks and, since these disks can be hard to detect, it is likely that the fraction is even higher. Current instruments are only able to detect debris disks in systems that are at least an order of magnitude more luminous than the disk generated by the solar system’s Kuiper Belt (the region extending from the orbit of Neptune at about thirty astronomical units out to about fifty au).
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2021-12-03
