4.7 Article

On the wake generated by a planet in a disc

Journal

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 330, Issue 4, Pages 950-954

Publisher

BLACKWELL PUBLISHING LTD
DOI: 10.1046/j.1365-8711.2002.05148.x

Keywords

accretion, accretion discs; hydrodynamics; waves; planetary systems

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A planet of low mass orbiting in a two-dimensional gaseous disc generates a one-armed spiral wake. We explain this phenomenon as the result of constructive interference between wave modes in the disc, somewhat similar to the Kelvin wedge produced in the wake of a ship. The same feature is not expected in a three-dimensional disc with thermal stratification.

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