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
A Deep Search for Planets in the Inner 15 au around Vega
Tiffany Meshkat,Ricky Nilsson,Ricky Nilsson,Jonathan Aguilar,Gautam Vasisht,Rebecca Oppenheimer,Kate Y. L. Su,Eric Cady,Thomas Lockhart,Christopher T. Matthews,Richard Dekany,Jarron Leisenring,Marie Ygouf,Dimitri Mawet,Laurent Pueyo,Charles A. Beichman +15 more
TL;DR: In this paper, the authors presented the results of a deep high-contrast imaging search for planets around the Vega system using the coronagraphic integral field spectrograph Project 1640 (P1640).
Journal ArticleDOI
ALMA imaging of the M-dwarf Fomalhaut C's debris disc
Patrick Cronin-Coltsmann,Grant M. Kennedy,Paul Kalas,Paul Kalas,Julien Milli,Julien Milli,Cathie J. Clarke,Gaspard Duchene,Gaspard Duchene,Jane Greaves,Samantha Lawler,Jean-Francois Lestrade,Brenda C. Matthews,Brenda C. Matthews,A. Shannon,Mark C. Wyatt +15 more
TL;DR: In this paper, the Atacama Large Millimetre Array (ALMA) was used to model the Fomalhaut C (LP 876-10) debris disc.
Proceedings ArticleDOI
The Debris Disk Explorer: A Balloon-Borne Coronagraph for Observing Debris Disks
Lewis C. Roberts,Geoffrey Bryden,Wesley A. Traub,Stephen C. Unwin,John T. Trauger,John Krist,Jack Aldrich,Paul Brugarolas,Karl R. Stapelfeldt,Mark Wyatt,David Stuchlik,James Lanzi +11 more
TL;DR: The Debris Disk Explorer (DDX) is a balloon-borne investigation of debris disks around nearby stars as mentioned in this paper, which can measure the size, shape, brightness, and color of tens of disks.
Journal ArticleDOI
A Comprehensive Dust Model Applied to the Resolved Beta Pictoris Debris Disk from Optical to Radio Wavelengths
TL;DR: In this article, the authors investigate whether varying the dust composition (described by the optical constants) can solve a persistent problem in debris disk modeling, the inability to fit the thermal emission without over-predicting the scattered light.
Journal ArticleDOI
Debris Disks in Multi-Planet Systems: Are Our Inferences Compromised by Unseen Planets?
TL;DR: In this paper, the authors investigate if/how planet properties inferred from single-planet models are compromised when multiple planets reside in the system, and summarize the configurations for which assuming a single planet (i.e., planet b) leads to significantly flawed inferences of that planet's properties.
References
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