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Keplerian disk

(disk whose motion follows Kepler's laws)

A Keplerian disk is a disk of material that follows Kepler's laws of motion in conjunction with a central body, which could be a circumstellar disk, or rings around a planet, both of which generally follow the laws for the most part.

The Keplerian disk concept is a somewhat ideal (a first approximation), as forces other than gravity can make portions of the disk diverge from normal Keplerian orbit such as radiation pressure from the central star or pressure from heat in the disk material. Such non-gravitational pressure helps keep the material from falling into the star, thus once things have found a stable state, the material is moving slower than it would in a pure Keplerian orbit.


(disks,object type)
http://astronomy.swin.edu.au/cosmos/K/Keplerian+Disk

Referenced by:
Lindblad torque
magnetorotational instability (MRI)
planet formation
Rossby wave instability (RWI)

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