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Secular evolution of eccentricity in protoplanetary discs with gap-opening planets

dc.creatorTeyssandier, Jean Adrien
dc.creatorOgilvie, Gordon Ian
dc.description.abstractWe explore the evolution of the eccentricity of an accretion disc perturbed by an embedded planet whose mass is sufficient to open a large gap in the disc. Various methods for representing the orbit-averaged motion of an eccentric disc are discussed. We characterize the linear instability that leads to the growth of eccentricity by means of hydrodynamical simulations. We numerically recover the known result that eccentricity growth in the disc is possible when the planet-to-star mass ratio exceeds 3 × 10$^{−3}$. For mass ratios larger than this threshold, the precession rates and growth rates derived from simulations, as well as the shape of the eccentric mode, compare well with the predictions of a linear theory of eccentric discs. We study mechanisms by which the eccentricity growth eventually saturates into a non-linear regime.
dc.publisherOxford University Press
dc.publisherMonthly Notices of the Royal Astronomical Society
dc.subjectaccretion, accretion discs
dc.subjectcelestial mechanics
dc.subjectplanet-disc interactions
dc.titleSecular evolution of eccentricity in protoplanetary discs with gap-opening planets

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