Predictions for a planet just inside Fomalhaut's eccentric ring
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In this paper, the eccentricity and sharpness of the edge of Fomalhaut's disk are due to a planet just interior to the ring edge, which is likely to be located at the boundary of a chaotic zone in the corotation region of the planet.Abstract:
We propose that the eccentricity and sharpness of the edge of Fomalhaut’s disk are due to a planet just interior to the ring edge. The collision timescale consistent with the disk opacity is long enough that spiral density waves cannot be driven near the planet. The ring edge is likely to be located at the boundary of a chaotic zone in the corotation region of the planet. We find that this zone can open a gap in a particle disk as long as the collision timescale exceeds the removal or ejection timescale in the zone. We use the slope measured from the ring edge surface brightness profile to place an upper limit on the planet mass. The removal timescale in the chaotic zone is used to estimate a lower limit. The ring edge has eccentricity caused by secular perturbations from the planet. These arguments imply that the planet has a mass between that of Neptune and that of Saturn, a semi-major axis of approximately 119 AU and longitude of periastron and eccentricity, 0.1, the same as that of the ring edge.read more
Citations
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Journal ArticleDOI
FOMALHAUT b AS A DUST CLOUD: FREQUENT COLLISIONS WITHIN THE FOMALHAUT DISK
TL;DR: In this article, collisional probability simulations of the Fomalhaut debris disk based on the structure of our Kuiper Belt are performed, finding that the catastrophic disruption rate of d 100 km bodies in the high-eccentricity scattering component is several per decade.
Book ChapterDOI
Dusty Planetary Systems
TL;DR: In this article, the authors discuss the physical processes that affect dust particles in the gas-free environment of a debris disk and their effect on the dust particle size and spatial distribution.
Journal ArticleDOI
Insights into the planetary dynamics of HD 206893 with ALMA
Sebastian Marino,Alice Zurlo,Virginie Faramaz,Julien Milli,Th. Henning,Grant M. Kennedy,Luca Matrà,Sebastián Pérez,Philippe Delorme,Lucas A. Cieza,A. M. Hughes +10 more
TL;DR: In this article, the authors present ALMA observations of the debris/planetesimal disc surrounding HD 206893, a system that also hosts two massive companions at 2 and 11 au, and reveal a disc extending from 30 to 180 au, split by a 27 au wide gap centred at 74 au.
Book ChapterDOI
Dusty Planetary Systems
TL;DR: In this article, the authors discuss the physical processes that affect dust particles in the gas-free environment of a debris disk and their effect on the dust particle size and spatial distribution.
Journal ArticleDOI
The inner debris structure in the fomalhaut planetary system
Kate Y. L. Su,George H. Rieke,Denis Defrere,Kuo Song Wang,Shih-Ping Lai,David J. Wilner,Rik van Lieshout,Chin-Fei Lee +7 more
TL;DR: In this article, the authors presented ALMA cycle 1, 870 μm (345 GHz) observations targeted at the inner part of the Fomalhaut system with a synthesized beam of 0 45 ×0 37 (∼3 AU linear resolution at the distance of Fomal Haut) and an rms of 26 μJy beam.
References
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Book
Solar system dynamics
TL;DR: In this paper, the two-body problem and the restricted three body problem are considered. And the disturbing function is extended to include the spin-orbit coupling and the resonance perturbations.
Solar system dynamics
TL;DR: In this paper, the two-body problem and the restricted three body problem are considered. But the disturbing function is defined as a special case of the two body problem and is not considered in this paper.
Journal ArticleDOI
Disk-Satellite Interactions
Peter Goldreich,Scott Tremaine +1 more
TL;DR: In this article, the authors calculate the rate at which angular momentum and energy are transferred between a disk and a satellite which orbit the same central mass, and show that substantial changes in both the structure of the disk and the orbit of Jupiter must have taken place on a time scale of a few thousand years.
Journal ArticleDOI
The resonance overlap criterion and the onset of stochastic behavior in the restricted three-body problem
TL;DR: In this article, the resonance overlap criterion for the onset of stochastic behavior was applied to the planar circular-restricted three-body problem with small mass ratio (mu), and its predictions for mu = 0.001, 0.0001, and 0.00001 were compared to the transitions observed in the numerically determined Kolmogorov-Sinai entropy and found to be in remarkably good agreement.
Journal ArticleDOI
Submillimetre images of dusty debris around nearby stars
Wayne S. Holland,Jane Greaves,Barry Zuckerman,R. A. Webb,C. McCarthy,I. M. Coulson,D. Walther,William R. M. Dent,Walter Kieran Gear,Ian Robson +9 more
TL;DR: In this paper, the presence of the central cavity, approximately the size of Neptune's orbit, was detected in the emission from Fomalhaut, beta Pictoris and Vega, which may be the signature of Earth-like planets.