Consequences of a distant massive planet on the large semimajor axis trans-Neptunian objects

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.3847/1538-3881/153/2/63
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Name affiliation
  1. National Research Council of Canada. Herzberg Astronomy and Astrophysics
FormatText, Article
Journal titleThe Astronomical Journal
ISSN0004-6256
1538-3881
Volume153
Issue2
Pages63–
SubjectKuiper belt: general; planet; disk interactions
Abstract
We explore the distant giant planet hypothesis by integrating the large-semimajor-axis, large-pericenter trans-Neptunian objects (TNOs) in the presence of the giant planets and an external perturber whose orbit is consistent with the proposed distant, eccentric, and inclined giant planet, so-called planet 9. We find that TNOs with semimajor axes greater than 250 au experience some longitude of perihelion shepherding, but that a generic outcome of such evolutions is that the TNOs evolve to larger pericenter orbits and commonly get raised to retrograde inclinations. This pericenter and inclination evolution requires a massive disk of TNOs (tens of ${M}_{\oplus }$) in order to explain the detection of the known sample today. Some of the highly inclined orbits produced by the examined perturbers will be inside of the orbital parameter space probed by prior surveys, implying a missing signature of the ninth-planet scenario. The distant giant planet scenarios explored in this work do not reproduce the observed signal of simultaneous clustering in argument of pericenter, longitude of the ascending node, and longitude of perihelion in the region of the known TNOs.
Publication date
PublisherAmerican Astronomical Society
LanguageEnglish
Peer reviewedYes
NPARC number23002676
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